Compare commits
3
Commits
| Author | SHA1 | Date | |
|---|---|---|---|
 fritz-hh
|
d55e36267a | ||
|
fritz-hh
|
6ea29cc892 | ||
|
fritz-hh
|
0245ce4385 |
-24
@@ -1,24 +0,0 @@
|
||||
[paths]
|
||||
source =
|
||||
src
|
||||
*/site-packages
|
||||
|
||||
[run]
|
||||
branch = true
|
||||
parallel = true
|
||||
concurrency =
|
||||
thread
|
||||
multiprocessing
|
||||
source =
|
||||
src/ocrmypdf
|
||||
|
||||
[report]
|
||||
exclude_lines =
|
||||
pragma: no cover
|
||||
def __repr__
|
||||
raise AssertionError
|
||||
raise NotImplementedError
|
||||
if 0:
|
||||
if False:
|
||||
if __name__ == .__main__.:
|
||||
if TYPE_CHECKING:
|
||||
@@ -1,81 +0,0 @@
|
||||
# OCRmyPDF
|
||||
#
|
||||
FROM ubuntu:20.04 as base
|
||||
|
||||
FROM base as builder
|
||||
|
||||
ENV LANG=C.UTF-8
|
||||
|
||||
RUN apt-get update && apt-get install -y --no-install-recommends \
|
||||
build-essential autoconf automake libtool \
|
||||
libleptonica-dev \
|
||||
zlib1g-dev \
|
||||
python3 \
|
||||
python3-distutils \
|
||||
ca-certificates \
|
||||
curl \
|
||||
git
|
||||
|
||||
# Get the latest pip (Ubuntu version doesn't support manylinux2010)
|
||||
RUN \
|
||||
curl https://bootstrap.pypa.io/get-pip.py | python3
|
||||
|
||||
# Compile and install jbig2
|
||||
# Needs libleptonica-dev, zlib1g-dev
|
||||
RUN \
|
||||
mkdir jbig2 \
|
||||
&& curl -L https://github.com/agl/jbig2enc/archive/ea6a40a.tar.gz | \
|
||||
tar xz -C jbig2 --strip-components=1 \
|
||||
&& cd jbig2 \
|
||||
&& ./autogen.sh && ./configure && make && make install \
|
||||
&& cd .. \
|
||||
&& rm -rf jbig2
|
||||
|
||||
COPY . /app
|
||||
|
||||
WORKDIR /app
|
||||
|
||||
RUN pip3 install --no-cache-dir \
|
||||
-r requirements/main.txt \
|
||||
-r requirements/webservice.txt \
|
||||
-r requirements/test.txt \
|
||||
-r requirements/watcher.txt \
|
||||
.
|
||||
|
||||
FROM base
|
||||
|
||||
ENV LANG=C.UTF-8
|
||||
|
||||
RUN apt-get update && apt-get install -y --no-install-recommends \
|
||||
ghostscript \
|
||||
img2pdf \
|
||||
liblept5 \
|
||||
libsm6 libxext6 libxrender-dev \
|
||||
zlib1g \
|
||||
pngquant \
|
||||
python3 \
|
||||
qpdf \
|
||||
tesseract-ocr \
|
||||
tesseract-ocr-chi-sim \
|
||||
tesseract-ocr-deu \
|
||||
tesseract-ocr-eng \
|
||||
tesseract-ocr-fra \
|
||||
tesseract-ocr-por \
|
||||
tesseract-ocr-spa \
|
||||
unpaper
|
||||
|
||||
WORKDIR /app
|
||||
|
||||
COPY --from=builder /usr/local/lib/ /usr/local/lib/
|
||||
COPY --from=builder /usr/local/bin/ /usr/local/bin/
|
||||
|
||||
COPY --from=builder /app/misc/webservice.py /app/
|
||||
COPY --from=builder /app/misc/watcher.py /app/
|
||||
|
||||
# Copy minimal project files to get the test suite.
|
||||
COPY --from=builder /app/setup.cfg /app/setup.py /app/README.md /app/
|
||||
COPY --from=builder /app/requirements /app/requirements
|
||||
COPY --from=builder /app/tests /app/tests
|
||||
COPY --from=builder /app/src /app/src
|
||||
|
||||
ENTRYPOINT ["/usr/local/bin/ocrmypdf"]
|
||||
@@ -1,44 +0,0 @@
|
||||
# dotfiles
|
||||
.*
|
||||
!.coveragerc
|
||||
!.dockerignore
|
||||
!.git_archival.txt
|
||||
!.gitattributes
|
||||
!.gitignore
|
||||
!.pre-commit-config.yaml
|
||||
!.readthedocs.yml
|
||||
|
||||
# Dev scratch
|
||||
*.ipynb
|
||||
**/*.pyc
|
||||
/*.pdf
|
||||
/*.qdf
|
||||
/*.png
|
||||
/scratch.py
|
||||
IDEAS
|
||||
log/
|
||||
tests/resources/private/
|
||||
tmp/
|
||||
venv*/
|
||||
/debug_tests.py
|
||||
*.traineddata
|
||||
/private
|
||||
|
||||
# Package building
|
||||
*.egg-info/
|
||||
build/
|
||||
dist/
|
||||
wheelhouse/
|
||||
pip-wheel-metadata/
|
||||
|
||||
# Code coverage
|
||||
htmlcov/
|
||||
|
||||
# Docker specific
|
||||
bin/
|
||||
docs/
|
||||
include/
|
||||
lib/
|
||||
|
||||
# Docker include .git/
|
||||
!.git/
|
||||
@@ -1 +0,0 @@
|
||||
ref-names: $Format:%D$
|
||||
+1
-7
@@ -5,10 +5,4 @@
|
||||
# (binary is a macro for -text -diff)
|
||||
*.jar binary
|
||||
*.pdf binary
|
||||
*.PDF binary
|
||||
*.png binary
|
||||
*.jpg binary
|
||||
*.bin binary
|
||||
*.afdesign binary
|
||||
|
||||
.git_archival.txt export-subst
|
||||
*.PDF binary
|
||||
@@ -1,12 +0,0 @@
|
||||
# These are supported funding model platforms
|
||||
|
||||
github: # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
|
||||
patreon: # Replace with a single Patreon username
|
||||
open_collective: james-barlow
|
||||
ko_fi: # Replace with a single Ko-fi username
|
||||
tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
|
||||
community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
|
||||
liberapay: # Replace with a single Liberapay username
|
||||
issuehunt: # Replace with a single IssueHunt username
|
||||
otechie: # Replace with a single Otechie username
|
||||
custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']
|
||||
@@ -1,40 +0,0 @@
|
||||
---
|
||||
name: Bug report
|
||||
about: Create a report to help us improve
|
||||
title: ''
|
||||
labels: ''
|
||||
assignees: ''
|
||||
|
||||
---
|
||||
|
||||
**Describe the bug**
|
||||
A clear and concise description of what the bug is.
|
||||
|
||||
**To Reproduce**
|
||||
What command line or API call were you trying to run?
|
||||
|
||||
```bash
|
||||
ocrmypdf ...arguments... input.pdf output.pdf
|
||||
```
|
||||
|
||||
Run with verbosity or higher `-v1` to see more detailed logging. This information may be helpful.
|
||||
|
||||
**Example file**
|
||||
Include an input PDF or image that demonstrates your issue.
|
||||
|
||||
Please provide an input file with no personal or confidential information. At your option you may `GPG-encrypt the file <https://github.com/jbarlow83/OCRmyPDF/wiki>` for OCRmyPDF's author only.
|
||||
|
||||
Links to files hosted elsewhere are perfectly acceptable. You could also look in ``tests/resources`` and see if any of those files reproduce your issue.
|
||||
|
||||
(Exceptions: Issues with installation, command line argument parsing, test suite failures.Issues without example files usually cannot be resolved.)
|
||||
|
||||
**Expected behavior**
|
||||
A clear and concise description of what you expected to happen.
|
||||
|
||||
**Screenshots**
|
||||
If applicable, add screenshots to help explain your problem.
|
||||
|
||||
**System**
|
||||
- OS: [e.g. Linux, Windows, macOS]
|
||||
- OCRmyPDF Version: ``ocrmypdf --version``
|
||||
- How did you install ocrmypdf? Did you use a system package manager, `pip`, or a Docker image?
|
||||
@@ -1,17 +0,0 @@
|
||||
---
|
||||
name: Feature request
|
||||
about: Suggest an idea for this project
|
||||
title: ''
|
||||
labels: enhancement
|
||||
assignees: ''
|
||||
|
||||
---
|
||||
|
||||
**Is your feature request related to a problem? Please describe.**
|
||||
A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
|
||||
|
||||
**Describe the solution you'd like**
|
||||
A clear and concise description of what you want to happen.
|
||||
|
||||
**Additional context**
|
||||
Add any other context or screenshots about the feature request here.
|
||||
@@ -1,33 +0,0 @@
|
||||
**Describe the issue**
|
||||
A clear and concise description of what the issue is.
|
||||
|
||||
**To Reproduce**
|
||||
What command line were you trying to run?
|
||||
|
||||
```bash
|
||||
ocrmypdf ...arguments... input.pdf output.pdf
|
||||
```
|
||||
|
||||
**Example file**
|
||||
Please include an example *input* PDF (or image). The input file is more helpful.
|
||||
|
||||
Please check any or all that apply about the test file:
|
||||
|
||||
- [ ] This is the input file
|
||||
- [ ] The file contains no personal or confidential information
|
||||
- [ ] I am the copyright holder for this file
|
||||
- [ ] I permit this file to be included in the OCRmyPDF test suite under the CC-BY-SA 4.0 license
|
||||
- [ ] I am not the copyright holder, but this file is available under a free software license
|
||||
|
||||
Files that are not free for inclusion in this project are quite welcome, but we like to collect free files for our test suite when possible. Please do *not* submit files with confidential information. At your option you may encrypt files for OCRmyPDF's author only.
|
||||
|
||||
**Expected behavior**
|
||||
A clear and concise description of what you expected to happen. Include screenshots if applicable.
|
||||
|
||||
**System:**
|
||||
|
||||
- OS: [e.g. Linux, macOS]
|
||||
- OCRmyPDF Version: [e.g. v7.4.0]
|
||||
|
||||
**Additional context**
|
||||
Add any other context about the problem here.
|
||||
+1
-41
@@ -1,42 +1,2 @@
|
||||
# dotfiles
|
||||
.*
|
||||
!.coveragerc
|
||||
!.dockerignore
|
||||
!.git_archival.txt
|
||||
!.gitattributes
|
||||
!.gitignore
|
||||
!.pre-commit-config.yaml
|
||||
!.readthedocs.yml
|
||||
|
||||
# Dev scratch
|
||||
*.ipynb
|
||||
**/*.pyc
|
||||
/*.pdf
|
||||
/*.qdf
|
||||
/*.png
|
||||
/scratch.py
|
||||
IDEAS
|
||||
log/
|
||||
tests/resources/private/
|
||||
tmp/
|
||||
venv*/
|
||||
/debug_tests.py
|
||||
*.traineddata
|
||||
/private
|
||||
|
||||
# Package building
|
||||
*.egg-info/
|
||||
build/
|
||||
dist/
|
||||
wheelhouse/
|
||||
pip-wheel-metadata/
|
||||
|
||||
# Code coverage
|
||||
htmlcov/
|
||||
|
||||
# Automatically generated files
|
||||
docs/_build/
|
||||
docs/_static/
|
||||
docs/_templates/
|
||||
docs/Makefile
|
||||
ocrmypdf/lib/_*.py
|
||||
log/
|
||||
@@ -1,23 +0,0 @@
|
||||
repos:
|
||||
- repo: https://github.com/pre-commit/pre-commit-hooks
|
||||
rev: v3.1.0
|
||||
hooks:
|
||||
- id: check-case-conflict
|
||||
- id: check-merge-conflict
|
||||
- id: check-toml
|
||||
- id: check-yaml
|
||||
- id: debug-statements
|
||||
- repo: https://github.com/asottile/seed-isort-config
|
||||
rev: v2.2.0
|
||||
hooks:
|
||||
- id: seed-isort-config
|
||||
- repo: https://github.com/pre-commit/mirrors-isort
|
||||
rev: v5.0.5 # pick the isort version you'd like to use from https://github.com/pre-commit/mirrors-isort/releases
|
||||
hooks:
|
||||
- id: isort
|
||||
- repo: https://github.com/psf/black
|
||||
rev: 19.10b0
|
||||
hooks:
|
||||
- id: black
|
||||
language_version: python3.8
|
||||
exclude: ^src/ocrmypdf/lib/_leptonica.py
|
||||
@@ -1,10 +0,0 @@
|
||||
build:
|
||||
image: latest
|
||||
|
||||
python:
|
||||
version: 3.6
|
||||
|
||||
formats:
|
||||
- pdf
|
||||
|
||||
requirements_file: requirements/main.txt
|
||||
@@ -0,0 +1,17 @@
|
||||
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
of this software and associated documentation files (the "Software"), to deal
|
||||
in the Software without restriction, including without limitation the rights
|
||||
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
copies of the Software, and to permit persons to whom the Software is
|
||||
furnished to do so, subject to the following conditions:
|
||||
|
||||
The above copyright notice and this permission notice shall be included in
|
||||
all copies or substantial portions of the Software.
|
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
THE SOFTWARE.
|
||||
@@ -1,674 +0,0 @@
|
||||
GNU GENERAL PUBLIC LICENSE
|
||||
Version 3, 29 June 2007
|
||||
|
||||
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
|
||||
Everyone is permitted to copy and distribute verbatim copies
|
||||
of this license document, but changing it is not allowed.
|
||||
|
||||
Preamble
|
||||
|
||||
The GNU General Public License is a free, copyleft license for
|
||||
software and other kinds of works.
|
||||
|
||||
The licenses for most software and other practical works are designed
|
||||
to take away your freedom to share and change the works. By contrast,
|
||||
the GNU General Public License is intended to guarantee your freedom to
|
||||
share and change all versions of a program--to make sure it remains free
|
||||
software for all its users. We, the Free Software Foundation, use the
|
||||
GNU General Public License for most of our software; it applies also to
|
||||
any other work released this way by its authors. You can apply it to
|
||||
your programs, too.
|
||||
|
||||
When we speak of free software, we are referring to freedom, not
|
||||
price. Our General Public Licenses are designed to make sure that you
|
||||
have the freedom to distribute copies of free software (and charge for
|
||||
them if you wish), that you receive source code or can get it if you
|
||||
want it, that you can change the software or use pieces of it in new
|
||||
free programs, and that you know you can do these things.
|
||||
|
||||
To protect your rights, we need to prevent others from denying you
|
||||
these rights or asking you to surrender the rights. Therefore, you have
|
||||
certain responsibilities if you distribute copies of the software, or if
|
||||
you modify it: responsibilities to respect the freedom of others.
|
||||
|
||||
For example, if you distribute copies of such a program, whether
|
||||
gratis or for a fee, you must pass on to the recipients the same
|
||||
freedoms that you received. You must make sure that they, too, receive
|
||||
or can get the source code. And you must show them these terms so they
|
||||
know their rights.
|
||||
|
||||
Developers that use the GNU GPL protect your rights with two steps:
|
||||
(1) assert copyright on the software, and (2) offer you this License
|
||||
giving you legal permission to copy, distribute and/or modify it.
|
||||
|
||||
For the developers' and authors' protection, the GPL clearly explains
|
||||
that there is no warranty for this free software. For both users' and
|
||||
authors' sake, the GPL requires that modified versions be marked as
|
||||
changed, so that their problems will not be attributed erroneously to
|
||||
authors of previous versions.
|
||||
|
||||
Some devices are designed to deny users access to install or run
|
||||
modified versions of the software inside them, although the manufacturer
|
||||
can do so. This is fundamentally incompatible with the aim of
|
||||
protecting users' freedom to change the software. The systematic
|
||||
pattern of such abuse occurs in the area of products for individuals to
|
||||
use, which is precisely where it is most unacceptable. Therefore, we
|
||||
have designed this version of the GPL to prohibit the practice for those
|
||||
products. If such problems arise substantially in other domains, we
|
||||
stand ready to extend this provision to those domains in future versions
|
||||
of the GPL, as needed to protect the freedom of users.
|
||||
|
||||
Finally, every program is threatened constantly by software patents.
|
||||
States should not allow patents to restrict development and use of
|
||||
software on general-purpose computers, but in those that do, we wish to
|
||||
avoid the special danger that patents applied to a free program could
|
||||
make it effectively proprietary. To prevent this, the GPL assures that
|
||||
patents cannot be used to render the program non-free.
|
||||
|
||||
The precise terms and conditions for copying, distribution and
|
||||
modification follow.
|
||||
|
||||
TERMS AND CONDITIONS
|
||||
|
||||
0. Definitions.
|
||||
|
||||
"This License" refers to version 3 of the GNU General Public License.
|
||||
|
||||
"Copyright" also means copyright-like laws that apply to other kinds of
|
||||
works, such as semiconductor masks.
|
||||
|
||||
"The Program" refers to any copyrightable work licensed under this
|
||||
License. Each licensee is addressed as "you". "Licensees" and
|
||||
"recipients" may be individuals or organizations.
|
||||
|
||||
To "modify" a work means to copy from or adapt all or part of the work
|
||||
in a fashion requiring copyright permission, other than the making of an
|
||||
exact copy. The resulting work is called a "modified version" of the
|
||||
earlier work or a work "based on" the earlier work.
|
||||
|
||||
A "covered work" means either the unmodified Program or a work based
|
||||
on the Program.
|
||||
|
||||
To "propagate" a work means to do anything with it that, without
|
||||
permission, would make you directly or secondarily liable for
|
||||
infringement under applicable copyright law, except executing it on a
|
||||
computer or modifying a private copy. Propagation includes copying,
|
||||
distribution (with or without modification), making available to the
|
||||
public, and in some countries other activities as well.
|
||||
|
||||
To "convey" a work means any kind of propagation that enables other
|
||||
parties to make or receive copies. Mere interaction with a user through
|
||||
a computer network, with no transfer of a copy, is not conveying.
|
||||
|
||||
An interactive user interface displays "Appropriate Legal Notices"
|
||||
to the extent that it includes a convenient and prominently visible
|
||||
feature that (1) displays an appropriate copyright notice, and (2)
|
||||
tells the user that there is no warranty for the work (except to the
|
||||
extent that warranties are provided), that licensees may convey the
|
||||
work under this License, and how to view a copy of this License. If
|
||||
the interface presents a list of user commands or options, such as a
|
||||
menu, a prominent item in the list meets this criterion.
|
||||
|
||||
1. Source Code.
|
||||
|
||||
The "source code" for a work means the preferred form of the work
|
||||
for making modifications to it. "Object code" means any non-source
|
||||
form of a work.
|
||||
|
||||
A "Standard Interface" means an interface that either is an official
|
||||
standard defined by a recognized standards body, or, in the case of
|
||||
interfaces specified for a particular programming language, one that
|
||||
is widely used among developers working in that language.
|
||||
|
||||
The "System Libraries" of an executable work include anything, other
|
||||
than the work as a whole, that (a) is included in the normal form of
|
||||
packaging a Major Component, but which is not part of that Major
|
||||
Component, and (b) serves only to enable use of the work with that
|
||||
Major Component, or to implement a Standard Interface for which an
|
||||
implementation is available to the public in source code form. A
|
||||
"Major Component", in this context, means a major essential component
|
||||
(kernel, window system, and so on) of the specific operating system
|
||||
(if any) on which the executable work runs, or a compiler used to
|
||||
produce the work, or an object code interpreter used to run it.
|
||||
|
||||
The "Corresponding Source" for a work in object code form means all
|
||||
the source code needed to generate, install, and (for an executable
|
||||
work) run the object code and to modify the work, including scripts to
|
||||
control those activities. However, it does not include the work's
|
||||
System Libraries, or general-purpose tools or generally available free
|
||||
programs which are used unmodified in performing those activities but
|
||||
which are not part of the work. For example, Corresponding Source
|
||||
includes interface definition files associated with source files for
|
||||
the work, and the source code for shared libraries and dynamically
|
||||
linked subprograms that the work is specifically designed to require,
|
||||
such as by intimate data communication or control flow between those
|
||||
subprograms and other parts of the work.
|
||||
|
||||
The Corresponding Source need not include anything that users
|
||||
can regenerate automatically from other parts of the Corresponding
|
||||
Source.
|
||||
|
||||
The Corresponding Source for a work in source code form is that
|
||||
same work.
|
||||
|
||||
2. Basic Permissions.
|
||||
|
||||
All rights granted under this License are granted for the term of
|
||||
copyright on the Program, and are irrevocable provided the stated
|
||||
conditions are met. This License explicitly affirms your unlimited
|
||||
permission to run the unmodified Program. The output from running a
|
||||
covered work is covered by this License only if the output, given its
|
||||
content, constitutes a covered work. This License acknowledges your
|
||||
rights of fair use or other equivalent, as provided by copyright law.
|
||||
|
||||
You may make, run and propagate covered works that you do not
|
||||
convey, without conditions so long as your license otherwise remains
|
||||
in force. You may convey covered works to others for the sole purpose
|
||||
of having them make modifications exclusively for you, or provide you
|
||||
with facilities for running those works, provided that you comply with
|
||||
the terms of this License in conveying all material for which you do
|
||||
not control copyright. Those thus making or running the covered works
|
||||
for you must do so exclusively on your behalf, under your direction
|
||||
and control, on terms that prohibit them from making any copies of
|
||||
your copyrighted material outside their relationship with you.
|
||||
|
||||
Conveying under any other circumstances is permitted solely under
|
||||
the conditions stated below. Sublicensing is not allowed; section 10
|
||||
makes it unnecessary.
|
||||
|
||||
3. Protecting Users' Legal Rights From Anti-Circumvention Law.
|
||||
|
||||
No covered work shall be deemed part of an effective technological
|
||||
measure under any applicable law fulfilling obligations under article
|
||||
11 of the WIPO copyright treaty adopted on 20 December 1996, or
|
||||
similar laws prohibiting or restricting circumvention of such
|
||||
measures.
|
||||
|
||||
When you convey a covered work, you waive any legal power to forbid
|
||||
circumvention of technological measures to the extent such circumvention
|
||||
is effected by exercising rights under this License with respect to
|
||||
the covered work, and you disclaim any intention to limit operation or
|
||||
modification of the work as a means of enforcing, against the work's
|
||||
users, your or third parties' legal rights to forbid circumvention of
|
||||
technological measures.
|
||||
|
||||
4. Conveying Verbatim Copies.
|
||||
|
||||
You may convey verbatim copies of the Program's source code as you
|
||||
receive it, in any medium, provided that you conspicuously and
|
||||
appropriately publish on each copy an appropriate copyright notice;
|
||||
keep intact all notices stating that this License and any
|
||||
non-permissive terms added in accord with section 7 apply to the code;
|
||||
keep intact all notices of the absence of any warranty; and give all
|
||||
recipients a copy of this License along with the Program.
|
||||
|
||||
You may charge any price or no price for each copy that you convey,
|
||||
and you may offer support or warranty protection for a fee.
|
||||
|
||||
5. Conveying Modified Source Versions.
|
||||
|
||||
You may convey a work based on the Program, or the modifications to
|
||||
produce it from the Program, in the form of source code under the
|
||||
terms of section 4, provided that you also meet all of these conditions:
|
||||
|
||||
a) The work must carry prominent notices stating that you modified
|
||||
it, and giving a relevant date.
|
||||
|
||||
b) The work must carry prominent notices stating that it is
|
||||
released under this License and any conditions added under section
|
||||
7. This requirement modifies the requirement in section 4 to
|
||||
"keep intact all notices".
|
||||
|
||||
c) You must license the entire work, as a whole, under this
|
||||
License to anyone who comes into possession of a copy. This
|
||||
License will therefore apply, along with any applicable section 7
|
||||
additional terms, to the whole of the work, and all its parts,
|
||||
regardless of how they are packaged. This License gives no
|
||||
permission to license the work in any other way, but it does not
|
||||
invalidate such permission if you have separately received it.
|
||||
|
||||
d) If the work has interactive user interfaces, each must display
|
||||
Appropriate Legal Notices; however, if the Program has interactive
|
||||
interfaces that do not display Appropriate Legal Notices, your
|
||||
work need not make them do so.
|
||||
|
||||
A compilation of a covered work with other separate and independent
|
||||
works, which are not by their nature extensions of the covered work,
|
||||
and which are not combined with it such as to form a larger program,
|
||||
in or on a volume of a storage or distribution medium, is called an
|
||||
"aggregate" if the compilation and its resulting copyright are not
|
||||
used to limit the access or legal rights of the compilation's users
|
||||
beyond what the individual works permit. Inclusion of a covered work
|
||||
in an aggregate does not cause this License to apply to the other
|
||||
parts of the aggregate.
|
||||
|
||||
6. Conveying Non-Source Forms.
|
||||
|
||||
You may convey a covered work in object code form under the terms
|
||||
of sections 4 and 5, provided that you also convey the
|
||||
machine-readable Corresponding Source under the terms of this License,
|
||||
in one of these ways:
|
||||
|
||||
a) Convey the object code in, or embodied in, a physical product
|
||||
(including a physical distribution medium), accompanied by the
|
||||
Corresponding Source fixed on a durable physical medium
|
||||
customarily used for software interchange.
|
||||
|
||||
b) Convey the object code in, or embodied in, a physical product
|
||||
(including a physical distribution medium), accompanied by a
|
||||
written offer, valid for at least three years and valid for as
|
||||
long as you offer spare parts or customer support for that product
|
||||
model, to give anyone who possesses the object code either (1) a
|
||||
copy of the Corresponding Source for all the software in the
|
||||
product that is covered by this License, on a durable physical
|
||||
medium customarily used for software interchange, for a price no
|
||||
more than your reasonable cost of physically performing this
|
||||
conveying of source, or (2) access to copy the
|
||||
Corresponding Source from a network server at no charge.
|
||||
|
||||
c) Convey individual copies of the object code with a copy of the
|
||||
written offer to provide the Corresponding Source. This
|
||||
alternative is allowed only occasionally and noncommercially, and
|
||||
only if you received the object code with such an offer, in accord
|
||||
with subsection 6b.
|
||||
|
||||
d) Convey the object code by offering access from a designated
|
||||
place (gratis or for a charge), and offer equivalent access to the
|
||||
Corresponding Source in the same way through the same place at no
|
||||
further charge. You need not require recipients to copy the
|
||||
Corresponding Source along with the object code. If the place to
|
||||
copy the object code is a network server, the Corresponding Source
|
||||
may be on a different server (operated by you or a third party)
|
||||
that supports equivalent copying facilities, provided you maintain
|
||||
clear directions next to the object code saying where to find the
|
||||
Corresponding Source. Regardless of what server hosts the
|
||||
Corresponding Source, you remain obligated to ensure that it is
|
||||
available for as long as needed to satisfy these requirements.
|
||||
|
||||
e) Convey the object code using peer-to-peer transmission, provided
|
||||
you inform other peers where the object code and Corresponding
|
||||
Source of the work are being offered to the general public at no
|
||||
charge under subsection 6d.
|
||||
|
||||
A separable portion of the object code, whose source code is excluded
|
||||
from the Corresponding Source as a System Library, need not be
|
||||
included in conveying the object code work.
|
||||
|
||||
A "User Product" is either (1) a "consumer product", which means any
|
||||
tangible personal property which is normally used for personal, family,
|
||||
or household purposes, or (2) anything designed or sold for incorporation
|
||||
into a dwelling. In determining whether a product is a consumer product,
|
||||
doubtful cases shall be resolved in favor of coverage. For a particular
|
||||
product received by a particular user, "normally used" refers to a
|
||||
typical or common use of that class of product, regardless of the status
|
||||
of the particular user or of the way in which the particular user
|
||||
actually uses, or expects or is expected to use, the product. A product
|
||||
is a consumer product regardless of whether the product has substantial
|
||||
commercial, industrial or non-consumer uses, unless such uses represent
|
||||
the only significant mode of use of the product.
|
||||
|
||||
"Installation Information" for a User Product means any methods,
|
||||
procedures, authorization keys, or other information required to install
|
||||
and execute modified versions of a covered work in that User Product from
|
||||
a modified version of its Corresponding Source. The information must
|
||||
suffice to ensure that the continued functioning of the modified object
|
||||
code is in no case prevented or interfered with solely because
|
||||
modification has been made.
|
||||
|
||||
If you convey an object code work under this section in, or with, or
|
||||
specifically for use in, a User Product, and the conveying occurs as
|
||||
part of a transaction in which the right of possession and use of the
|
||||
User Product is transferred to the recipient in perpetuity or for a
|
||||
fixed term (regardless of how the transaction is characterized), the
|
||||
Corresponding Source conveyed under this section must be accompanied
|
||||
by the Installation Information. But this requirement does not apply
|
||||
if neither you nor any third party retains the ability to install
|
||||
modified object code on the User Product (for example, the work has
|
||||
been installed in ROM).
|
||||
|
||||
The requirement to provide Installation Information does not include a
|
||||
requirement to continue to provide support service, warranty, or updates
|
||||
for a work that has been modified or installed by the recipient, or for
|
||||
the User Product in which it has been modified or installed. Access to a
|
||||
network may be denied when the modification itself materially and
|
||||
adversely affects the operation of the network or violates the rules and
|
||||
protocols for communication across the network.
|
||||
|
||||
Corresponding Source conveyed, and Installation Information provided,
|
||||
in accord with this section must be in a format that is publicly
|
||||
documented (and with an implementation available to the public in
|
||||
source code form), and must require no special password or key for
|
||||
unpacking, reading or copying.
|
||||
|
||||
7. Additional Terms.
|
||||
|
||||
"Additional permissions" are terms that supplement the terms of this
|
||||
License by making exceptions from one or more of its conditions.
|
||||
Additional permissions that are applicable to the entire Program shall
|
||||
be treated as though they were included in this License, to the extent
|
||||
that they are valid under applicable law. If additional permissions
|
||||
apply only to part of the Program, that part may be used separately
|
||||
under those permissions, but the entire Program remains governed by
|
||||
this License without regard to the additional permissions.
|
||||
|
||||
When you convey a copy of a covered work, you may at your option
|
||||
remove any additional permissions from that copy, or from any part of
|
||||
it. (Additional permissions may be written to require their own
|
||||
removal in certain cases when you modify the work.) You may place
|
||||
additional permissions on material, added by you to a covered work,
|
||||
for which you have or can give appropriate copyright permission.
|
||||
|
||||
Notwithstanding any other provision of this License, for material you
|
||||
add to a covered work, you may (if authorized by the copyright holders of
|
||||
that material) supplement the terms of this License with terms:
|
||||
|
||||
a) Disclaiming warranty or limiting liability differently from the
|
||||
terms of sections 15 and 16 of this License; or
|
||||
|
||||
b) Requiring preservation of specified reasonable legal notices or
|
||||
author attributions in that material or in the Appropriate Legal
|
||||
Notices displayed by works containing it; or
|
||||
|
||||
c) Prohibiting misrepresentation of the origin of that material, or
|
||||
requiring that modified versions of such material be marked in
|
||||
reasonable ways as different from the original version; or
|
||||
|
||||
d) Limiting the use for publicity purposes of names of licensors or
|
||||
authors of the material; or
|
||||
|
||||
e) Declining to grant rights under trademark law for use of some
|
||||
trade names, trademarks, or service marks; or
|
||||
|
||||
f) Requiring indemnification of licensors and authors of that
|
||||
material by anyone who conveys the material (or modified versions of
|
||||
it) with contractual assumptions of liability to the recipient, for
|
||||
any liability that these contractual assumptions directly impose on
|
||||
those licensors and authors.
|
||||
|
||||
All other non-permissive additional terms are considered "further
|
||||
restrictions" within the meaning of section 10. If the Program as you
|
||||
received it, or any part of it, contains a notice stating that it is
|
||||
governed by this License along with a term that is a further
|
||||
restriction, you may remove that term. If a license document contains
|
||||
a further restriction but permits relicensing or conveying under this
|
||||
License, you may add to a covered work material governed by the terms
|
||||
of that license document, provided that the further restriction does
|
||||
not survive such relicensing or conveying.
|
||||
|
||||
If you add terms to a covered work in accord with this section, you
|
||||
must place, in the relevant source files, a statement of the
|
||||
additional terms that apply to those files, or a notice indicating
|
||||
where to find the applicable terms.
|
||||
|
||||
Additional terms, permissive or non-permissive, may be stated in the
|
||||
form of a separately written license, or stated as exceptions;
|
||||
the above requirements apply either way.
|
||||
|
||||
8. Termination.
|
||||
|
||||
You may not propagate or modify a covered work except as expressly
|
||||
provided under this License. Any attempt otherwise to propagate or
|
||||
modify it is void, and will automatically terminate your rights under
|
||||
this License (including any patent licenses granted under the third
|
||||
paragraph of section 11).
|
||||
|
||||
However, if you cease all violation of this License, then your
|
||||
license from a particular copyright holder is reinstated (a)
|
||||
provisionally, unless and until the copyright holder explicitly and
|
||||
finally terminates your license, and (b) permanently, if the copyright
|
||||
holder fails to notify you of the violation by some reasonable means
|
||||
prior to 60 days after the cessation.
|
||||
|
||||
Moreover, your license from a particular copyright holder is
|
||||
reinstated permanently if the copyright holder notifies you of the
|
||||
violation by some reasonable means, this is the first time you have
|
||||
received notice of violation of this License (for any work) from that
|
||||
copyright holder, and you cure the violation prior to 30 days after
|
||||
your receipt of the notice.
|
||||
|
||||
Termination of your rights under this section does not terminate the
|
||||
licenses of parties who have received copies or rights from you under
|
||||
this License. If your rights have been terminated and not permanently
|
||||
reinstated, you do not qualify to receive new licenses for the same
|
||||
material under section 10.
|
||||
|
||||
9. Acceptance Not Required for Having Copies.
|
||||
|
||||
You are not required to accept this License in order to receive or
|
||||
run a copy of the Program. Ancillary propagation of a covered work
|
||||
occurring solely as a consequence of using peer-to-peer transmission
|
||||
to receive a copy likewise does not require acceptance. However,
|
||||
nothing other than this License grants you permission to propagate or
|
||||
modify any covered work. These actions infringe copyright if you do
|
||||
not accept this License. Therefore, by modifying or propagating a
|
||||
covered work, you indicate your acceptance of this License to do so.
|
||||
|
||||
10. Automatic Licensing of Downstream Recipients.
|
||||
|
||||
Each time you convey a covered work, the recipient automatically
|
||||
receives a license from the original licensors, to run, modify and
|
||||
propagate that work, subject to this License. You are not responsible
|
||||
for enforcing compliance by third parties with this License.
|
||||
|
||||
An "entity transaction" is a transaction transferring control of an
|
||||
organization, or substantially all assets of one, or subdividing an
|
||||
organization, or merging organizations. If propagation of a covered
|
||||
work results from an entity transaction, each party to that
|
||||
transaction who receives a copy of the work also receives whatever
|
||||
licenses to the work the party's predecessor in interest had or could
|
||||
give under the previous paragraph, plus a right to possession of the
|
||||
Corresponding Source of the work from the predecessor in interest, if
|
||||
the predecessor has it or can get it with reasonable efforts.
|
||||
|
||||
You may not impose any further restrictions on the exercise of the
|
||||
rights granted or affirmed under this License. For example, you may
|
||||
not impose a license fee, royalty, or other charge for exercise of
|
||||
rights granted under this License, and you may not initiate litigation
|
||||
(including a cross-claim or counterclaim in a lawsuit) alleging that
|
||||
any patent claim is infringed by making, using, selling, offering for
|
||||
sale, or importing the Program or any portion of it.
|
||||
|
||||
11. Patents.
|
||||
|
||||
A "contributor" is a copyright holder who authorizes use under this
|
||||
License of the Program or a work on which the Program is based. The
|
||||
work thus licensed is called the contributor's "contributor version".
|
||||
|
||||
A contributor's "essential patent claims" are all patent claims
|
||||
owned or controlled by the contributor, whether already acquired or
|
||||
hereafter acquired, that would be infringed by some manner, permitted
|
||||
by this License, of making, using, or selling its contributor version,
|
||||
but do not include claims that would be infringed only as a
|
||||
consequence of further modification of the contributor version. For
|
||||
purposes of this definition, "control" includes the right to grant
|
||||
patent sublicenses in a manner consistent with the requirements of
|
||||
this License.
|
||||
|
||||
Each contributor grants you a non-exclusive, worldwide, royalty-free
|
||||
patent license under the contributor's essential patent claims, to
|
||||
make, use, sell, offer for sale, import and otherwise run, modify and
|
||||
propagate the contents of its contributor version.
|
||||
|
||||
In the following three paragraphs, a "patent license" is any express
|
||||
agreement or commitment, however denominated, not to enforce a patent
|
||||
(such as an express permission to practice a patent or covenant not to
|
||||
sue for patent infringement). To "grant" such a patent license to a
|
||||
party means to make such an agreement or commitment not to enforce a
|
||||
patent against the party.
|
||||
|
||||
If you convey a covered work, knowingly relying on a patent license,
|
||||
and the Corresponding Source of the work is not available for anyone
|
||||
to copy, free of charge and under the terms of this License, through a
|
||||
publicly available network server or other readily accessible means,
|
||||
then you must either (1) cause the Corresponding Source to be so
|
||||
available, or (2) arrange to deprive yourself of the benefit of the
|
||||
patent license for this particular work, or (3) arrange, in a manner
|
||||
consistent with the requirements of this License, to extend the patent
|
||||
license to downstream recipients. "Knowingly relying" means you have
|
||||
actual knowledge that, but for the patent license, your conveying the
|
||||
covered work in a country, or your recipient's use of the covered work
|
||||
in a country, would infringe one or more identifiable patents in that
|
||||
country that you have reason to believe are valid.
|
||||
|
||||
If, pursuant to or in connection with a single transaction or
|
||||
arrangement, you convey, or propagate by procuring conveyance of, a
|
||||
covered work, and grant a patent license to some of the parties
|
||||
receiving the covered work authorizing them to use, propagate, modify
|
||||
or convey a specific copy of the covered work, then the patent license
|
||||
you grant is automatically extended to all recipients of the covered
|
||||
work and works based on it.
|
||||
|
||||
A patent license is "discriminatory" if it does not include within
|
||||
the scope of its coverage, prohibits the exercise of, or is
|
||||
conditioned on the non-exercise of one or more of the rights that are
|
||||
specifically granted under this License. You may not convey a covered
|
||||
work if you are a party to an arrangement with a third party that is
|
||||
in the business of distributing software, under which you make payment
|
||||
to the third party based on the extent of your activity of conveying
|
||||
the work, and under which the third party grants, to any of the
|
||||
parties who would receive the covered work from you, a discriminatory
|
||||
patent license (a) in connection with copies of the covered work
|
||||
conveyed by you (or copies made from those copies), or (b) primarily
|
||||
for and in connection with specific products or compilations that
|
||||
contain the covered work, unless you entered into that arrangement,
|
||||
or that patent license was granted, prior to 28 March 2007.
|
||||
|
||||
Nothing in this License shall be construed as excluding or limiting
|
||||
any implied license or other defenses to infringement that may
|
||||
otherwise be available to you under applicable patent law.
|
||||
|
||||
12. No Surrender of Others' Freedom.
|
||||
|
||||
If conditions are imposed on you (whether by court order, agreement or
|
||||
otherwise) that contradict the conditions of this License, they do not
|
||||
excuse you from the conditions of this License. If you cannot convey a
|
||||
covered work so as to satisfy simultaneously your obligations under this
|
||||
License and any other pertinent obligations, then as a consequence you may
|
||||
not convey it at all. For example, if you agree to terms that obligate you
|
||||
to collect a royalty for further conveying from those to whom you convey
|
||||
the Program, the only way you could satisfy both those terms and this
|
||||
License would be to refrain entirely from conveying the Program.
|
||||
|
||||
13. Use with the GNU Affero General Public License.
|
||||
|
||||
Notwithstanding any other provision of this License, you have
|
||||
permission to link or combine any covered work with a work licensed
|
||||
under version 3 of the GNU Affero General Public License into a single
|
||||
combined work, and to convey the resulting work. The terms of this
|
||||
License will continue to apply to the part which is the covered work,
|
||||
but the special requirements of the GNU Affero General Public License,
|
||||
section 13, concerning interaction through a network will apply to the
|
||||
combination as such.
|
||||
|
||||
14. Revised Versions of this License.
|
||||
|
||||
The Free Software Foundation may publish revised and/or new versions of
|
||||
the GNU General Public License from time to time. Such new versions will
|
||||
be similar in spirit to the present version, but may differ in detail to
|
||||
address new problems or concerns.
|
||||
|
||||
Each version is given a distinguishing version number. If the
|
||||
Program specifies that a certain numbered version of the GNU General
|
||||
Public License "or any later version" applies to it, you have the
|
||||
option of following the terms and conditions either of that numbered
|
||||
version or of any later version published by the Free Software
|
||||
Foundation. If the Program does not specify a version number of the
|
||||
GNU General Public License, you may choose any version ever published
|
||||
by the Free Software Foundation.
|
||||
|
||||
If the Program specifies that a proxy can decide which future
|
||||
versions of the GNU General Public License can be used, that proxy's
|
||||
public statement of acceptance of a version permanently authorizes you
|
||||
to choose that version for the Program.
|
||||
|
||||
Later license versions may give you additional or different
|
||||
permissions. However, no additional obligations are imposed on any
|
||||
author or copyright holder as a result of your choosing to follow a
|
||||
later version.
|
||||
|
||||
15. Disclaimer of Warranty.
|
||||
|
||||
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
|
||||
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
|
||||
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
|
||||
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
|
||||
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||||
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
|
||||
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
|
||||
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
|
||||
|
||||
16. Limitation of Liability.
|
||||
|
||||
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
|
||||
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
|
||||
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
|
||||
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
|
||||
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
|
||||
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
|
||||
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
|
||||
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
|
||||
SUCH DAMAGES.
|
||||
|
||||
17. Interpretation of Sections 15 and 16.
|
||||
|
||||
If the disclaimer of warranty and limitation of liability provided
|
||||
above cannot be given local legal effect according to their terms,
|
||||
reviewing courts shall apply local law that most closely approximates
|
||||
an absolute waiver of all civil liability in connection with the
|
||||
Program, unless a warranty or assumption of liability accompanies a
|
||||
copy of the Program in return for a fee.
|
||||
|
||||
END OF TERMS AND CONDITIONS
|
||||
|
||||
How to Apply These Terms to Your New Programs
|
||||
|
||||
If you develop a new program, and you want it to be of the greatest
|
||||
possible use to the public, the best way to achieve this is to make it
|
||||
free software which everyone can redistribute and change under these terms.
|
||||
|
||||
To do so, attach the following notices to the program. It is safest
|
||||
to attach them to the start of each source file to most effectively
|
||||
state the exclusion of warranty; and each file should have at least
|
||||
the "copyright" line and a pointer to where the full notice is found.
|
||||
|
||||
<one line to give the program's name and a brief idea of what it does.>
|
||||
Copyright (C) <year> <name of author>
|
||||
|
||||
This program is free software: you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation, either version 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program. If not, see <https://www.gnu.org/licenses/>.
|
||||
|
||||
Also add information on how to contact you by electronic and paper mail.
|
||||
|
||||
If the program does terminal interaction, make it output a short
|
||||
notice like this when it starts in an interactive mode:
|
||||
|
||||
<program> Copyright (C) <year> <name of author>
|
||||
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
|
||||
This is free software, and you are welcome to redistribute it
|
||||
under certain conditions; type `show c' for details.
|
||||
|
||||
The hypothetical commands `show w' and `show c' should show the appropriate
|
||||
parts of the General Public License. Of course, your program's commands
|
||||
might be different; for a GUI interface, you would use an "about box".
|
||||
|
||||
You should also get your employer (if you work as a programmer) or school,
|
||||
if any, to sign a "copyright disclaimer" for the program, if necessary.
|
||||
For more information on this, and how to apply and follow the GNU GPL, see
|
||||
<https://www.gnu.org/licenses/>.
|
||||
|
||||
The GNU General Public License does not permit incorporating your program
|
||||
into proprietary programs. If your program is a subroutine library, you
|
||||
may consider it more useful to permit linking proprietary applications with
|
||||
the library. If this is what you want to do, use the GNU Lesser General
|
||||
Public License instead of this License. But first, please read
|
||||
<https://www.gnu.org/licenses/why-not-lgpl.html>.
|
||||
+363
@@ -0,0 +1,363 @@
|
||||
#!/bin/sh
|
||||
##############################################################################
|
||||
# Copyright (c) 2013: fritz-hh from Github (https://github.com/fritz-hh)
|
||||
##############################################################################
|
||||
|
||||
TOOLNAME="OCRmyPDF"
|
||||
VERSION="v1.1-stable"
|
||||
|
||||
START=`date +%s`
|
||||
|
||||
usage() {
|
||||
cat << EOF
|
||||
--------------------------------------------------------------------------------------
|
||||
Script aimed at generating a searchable PDF file from a PDF file containing only images.
|
||||
(The script performs optical character recognition of each respective page using the
|
||||
tesseract engine)
|
||||
|
||||
Copyright: fritz from NAS4Free forum
|
||||
Version: $VERSION
|
||||
|
||||
Usage: OCRmyPDF.sh [-h] [-v] [-g] [-k] [-d] [-c] [-i] [-l language] [-C filename] inputfile outputfile
|
||||
|
||||
-h : Display this help message
|
||||
-v : Increase the verbosity (this option can be used more than once)
|
||||
-k : Do not delete the temporary files
|
||||
-g : Activate debug mode:
|
||||
- Generates a PDF file containing each page twice (once with the image, once without the image
|
||||
but with the OCRed text as well as the detected bounding boxes)
|
||||
- Set the verbosity to the highest possible
|
||||
- Do not delete the temporary files
|
||||
-d : Deskew each page before performing OCR
|
||||
-c : Clean each page before performing OCR
|
||||
-i : Incorporate the cleaned image in the final PDF file (by default the original image
|
||||
image, or the deskewed image if the -d option is set, is incorporated)
|
||||
-l : Set the language of the PDF file in order to improve OCR results (default "eng")
|
||||
Any language supported by tesseract is supported.
|
||||
-C : Pass an additional configuration file to the tesseract OCR engine.
|
||||
(this option can be used more than once)
|
||||
Note: The configuration file must be available in the "tessdata/configs" folder
|
||||
of your tesseract installation
|
||||
inputfile : PDF file to be OCRed
|
||||
outputfile : The PDF/A file to be generated
|
||||
--------------------------------------------------------------------------------------
|
||||
EOF
|
||||
}
|
||||
|
||||
|
||||
#################################################
|
||||
# Get an absolute path from a relative path to a file
|
||||
#
|
||||
# Param1 : Relative path
|
||||
# Returns: 1 if the folder in which the file is located does not exist
|
||||
# 0 otherwise
|
||||
#################################################
|
||||
absolutePath() {
|
||||
local wdsave absolutepath
|
||||
wdsave="$(pwd)"
|
||||
! cd "$(dirname "$1")" 1> /dev/null 2> /dev/null && return 1
|
||||
absolutepath="$(pwd)/$(basename "$1")"
|
||||
cd "$wdsave"
|
||||
echo "$absolutepath"
|
||||
return 0
|
||||
}
|
||||
|
||||
|
||||
|
||||
# Initialization of constants
|
||||
EXIT_BAD_ARGS="1" # possible exit codes
|
||||
EXIT_BAD_INPUT_FILE="2"
|
||||
EXIT_MISSING_DEPENDENCY="3"
|
||||
EXIT_INVALID_OUPUT_PDFA="4"
|
||||
EXIT_OTHER_ERROR="5"
|
||||
LOG_ERR="0" # 0=only error messages
|
||||
LOG_INFO="1" # 1=error messages and some infos
|
||||
LOG_DEBUG="2" # 2=debug level logging
|
||||
SRC="./src" # location of the source folder (except source of external tools like jhove)
|
||||
JHOVE="./jhove/bin/JhoveApp.jar" # java SW for validating the final PDF/A
|
||||
JHOVE_CFG="./jhove/conf/jhove.conf" # location of the jhove config file
|
||||
|
||||
# Initialization the configuration parameters with default values
|
||||
VERBOSITY="$LOG_ERR" # default verbosity level
|
||||
LAN="eng" # default language of the PDF file (required to get good OCR results)
|
||||
KEEP_TMP="0" # do not delete the temporary files (default)
|
||||
PREPROCESS_DESKEW="0" # 0=no, 1=yes (deskew image)
|
||||
PREPROCESS_CLEAN="0" # 0=no, 1=yes (clean image to improve OCR)
|
||||
PREPROCESS_CLEANTOPDF="0" # 0=no, 1=yes (put cleaned image in final PDF)
|
||||
PDF_NOIMG="0" # 0=no, 1=yes (generates each PDF page twice, with and without image)
|
||||
TESS_CFG_FILES="" # list of additional configuration files to be used by tesseract
|
||||
|
||||
# Parse optional command line arguments
|
||||
while getopts ":hvgkdcil:C:" opt; do
|
||||
case $opt in
|
||||
h) usage ; exit 0 ;;
|
||||
v) VERBOSITY=$(($VERBOSITY+1)) ;;
|
||||
k) KEEP_TMP="1" ;;
|
||||
g) PDF_NOIMG="1"; VERBOSITY="10"; KEEP_TMP="1" ;;
|
||||
d) PREPROCESS_DESKEW="1" ;;
|
||||
c) PREPROCESS_CLEAN="1" ;;
|
||||
i) PREPROCESS_CLEANTOPDF="1" ;;
|
||||
l) LAN="$OPTARG" ;;
|
||||
C) TESS_CFG_FILES="$OPTARG $TESS_CFG_FILES" ;;
|
||||
\?)
|
||||
echo "Invalid option: -$OPTARG" >&2
|
||||
usage
|
||||
exit $EXIT_BAD_ARGS ;;
|
||||
:)
|
||||
echo "Option -$OPTARG requires an argument" >&2
|
||||
usage
|
||||
exit $EXIT_BAD_ARGS ;;
|
||||
esac
|
||||
done
|
||||
|
||||
# Remove the optional arguments parsed above.
|
||||
shift $((OPTIND-1))
|
||||
|
||||
# Check if the number of mandatory parameters
|
||||
# provided is as expected
|
||||
if [ "$#" -ne "2" ]; then
|
||||
echo "Exactly two mandatory argument shall be provided ($# arguments provided)" >&2
|
||||
usage
|
||||
exit $EXIT_BAD_ARGS
|
||||
fi
|
||||
|
||||
! absolutePath "$1" > /dev/null && echo "The folder in which the input file should be located does not exist. Exiting..." >&2 && exit $EXIT_BAD_ARGS
|
||||
FILE_INPUT_PDF="`absolutePath "$1"`"
|
||||
! absolutePath "$2" > /dev/null && echo "The folder in which the output file should be generated does not exist. Exiting..." >&2 && exit $EXIT_BAD_ARGS
|
||||
FILE_OUTPUT_PDFA="`absolutePath "$2"`"
|
||||
|
||||
|
||||
|
||||
# set script path as working directory
|
||||
cd "`dirname $0`"
|
||||
|
||||
[ $VERBOSITY -ge $LOG_INFO ] && echo "$TOOLNAME version: $VERSION"
|
||||
|
||||
# check if the required utilities are installed
|
||||
[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Checking if all dependencies are installed"
|
||||
! command -v identify > /dev/null && echo "Please install ImageMagick. Exiting..." >&2 && exit $EXIT_MISSING_DEPENDENCY
|
||||
! command -v pdfimages > /dev/null && echo "Please install poppler-utils. Exiting..." >&2 && exit $EXIT_MISSING_DEPENDENCY
|
||||
! command -v pdftoppm > /dev/null && echo "Please install poppler-utils. Exiting..." >&2 && exit $EXIT_MISSING_DEPENDENCY
|
||||
! command -v pdftk > /dev/null && echo "Please install pdftk. Exiting..." >&2 && exit $EXIT_MISSING_DEPENDENCY
|
||||
[ $PREPROCESS_CLEAN -eq 1 ] && ! command -v unpaper > /dev/null && echo "Please install unpaper. Exiting..." >&2 && exit $EXIT_MISSING_DEPENDENCY
|
||||
! command -v tesseract > /dev/null && echo "Please install tesseract and tesseract-data. Exiting..." >&2 && exit $EXIT_MISSING_DEPENDENCY
|
||||
! command -v python > /dev/null && echo "Please install python, and the python libraries: reportlab, lxml. Exiting..." >&2 && exit $EXIT_MISSING_DEPENDENCY
|
||||
! command -v gs > /dev/null && echo "Please install ghostcript. Exiting..." >&2 && exit $EXIT_MISSING_DEPENDENCY
|
||||
! command -v java > /dev/null && echo "Please install java. Exiting..." >&2 && exit $EXIT_MISSING_DEPENDENCY
|
||||
|
||||
|
||||
|
||||
|
||||
# Initialize path to temporary files
|
||||
today=$(date +"%Y%m%d_%H%M")
|
||||
fld=$(basename "$FILE_INPUT_PDF" | sed 's/[.][^.]*//')
|
||||
TMP_FLD="./tmp/$today.filename.$fld"
|
||||
FILE_TMP="$TMP_FLD/tmp.txt" # temporary file with a very short lifetime (may be used for several things)
|
||||
FILE_SIZE_PAGES="$TMP_FLD/page-sizes.txt" # size in pt of the respective page of the input PDF file
|
||||
FILE_OUTPUT_PDF_CAT="${TMP_FLD}/ocred.pdf" # concatenated OCRed PDF files
|
||||
FILE_OUTPUT_PDFA_WO_META="${TMP_FLD}/ocred-pdfa-wo-metadata.pdf" # PDFA file before appending metadata
|
||||
FILE_VALIDATION_LOG="${TMP_FLD}/pdf_validation.log" # log file containing the results of the validation of the PDF/A file
|
||||
|
||||
# Create tmp folder
|
||||
[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Creating temporary folder: \"$TMP_FLD\""
|
||||
rm -r -f "${TMP_FLD}"
|
||||
mkdir -p "${TMP_FLD}"
|
||||
|
||||
|
||||
|
||||
|
||||
# get the size of each pdf page (width / height) in pt (inch*72)
|
||||
[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Input file: Extracting size of each page (in pt)"
|
||||
! identify -format "%w %h\n" "$FILE_INPUT_PDF" > "$FILE_TMP" \
|
||||
&& echo "Could not get size of PDF pages. Exiting..." >&2 && exit $EXIT_BAD_INPUT_FILE
|
||||
# removing empty lines (last one should be) and prepend page # before each line
|
||||
sed '/^$/d' "$FILE_TMP" | awk '{printf "%04d %s\n", NR, $0}' > "$FILE_SIZE_PAGES"
|
||||
numpages=`tail -n 1 "$FILE_SIZE_PAGES" | cut -f1 -d" "`
|
||||
|
||||
# Itterate the pages of the input pdf file
|
||||
while read pageSize ; do
|
||||
|
||||
page=`echo $pageSize | cut -f1 -d" "`
|
||||
[ $VERBOSITY -ge $LOG_INFO ] && echo "Processing page $page / $numpages"
|
||||
|
||||
# create the name of the required file
|
||||
curOrigImg="$TMP_FLD/${page}_Image" # original image available in the current PDF page
|
||||
# (the image file may have a different orientation than in the pdf file)
|
||||
curHocr="$TMP_FLD/$page.hocr" # hocr file to be generated by the OCR SW for the current page
|
||||
curOCRedPDF="$TMP_FLD/${page}-ocred.pdf" # PDF file containing the image + the OCRed text for the current page
|
||||
curOCRedPDFDebug="$TMP_FLD/${page}-debug-ocred.pdf" # PDF file containing data required to find out if OCR worked correctly
|
||||
|
||||
# get width / height of PDF page (in pt)
|
||||
widthPDF=`echo $pageSize | cut -f2 -d" "`
|
||||
heightPDF=`echo $pageSize | cut -f3 -d" "`
|
||||
[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Page $page: size ${heightPDF}x${widthPDF} (h*w in pt)"
|
||||
# extract raw image from pdf file to compute resolution
|
||||
# unfortunatelly this image can have another orientation than in the pdf...
|
||||
# so we will have to extract it again later using pdftoppm
|
||||
pdfimages -f $page -l $page -j "$FILE_INPUT_PDF" "$curOrigImg" 1>&2
|
||||
# count number of extracted images
|
||||
nbImg=`ls -1 "$curOrigImg"* | wc -l`
|
||||
[ $nbImg -ne "1" ] && echo "Expecting exactly 1 image on page $page (found $nbImg). Exiting..." >&2 && exit $EXIT_BAD_INPUT_FILE
|
||||
# Get characteristics of the extracted image
|
||||
curImg=`ls -1 "$curOrigImg"*`
|
||||
propCurImg=`identify -format "%w %h %[colorspace]" "$curImg"`
|
||||
widthCurImg=`echo "$propCurImg" | cut -f1 -d" "`
|
||||
heightCurImg=`echo "$propCurImg" | cut -f2 -d" "`
|
||||
colorspaceCurImg=`echo "$propCurImg" | cut -f3 -d" "`
|
||||
# switch height/width values if the image has not the right orientation
|
||||
# we make here the assumption that vertical/horizontal dpi are equal
|
||||
# we will check that later
|
||||
if [ $((($heightPDF-$widthPDF)*($heightCurImg-$widthCurImg))) -lt 0 ]; then
|
||||
[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Page $page: Extracted image has wrong orientation. Inverting image height/width values"
|
||||
tmpval=$heightCurImg
|
||||
heightCurImg=$widthCurImg
|
||||
widthCurImg=$tmpval
|
||||
fi
|
||||
[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Page $page: size ${heightCurImg}x${widthCurImg} (h*w pixel)"
|
||||
# compute the resolution of the image
|
||||
dpi_x=`echo "scale=5;$widthCurImg*72/$widthPDF" | bc`
|
||||
dpi_y=`echo "scale=5;$heightCurImg*72/$heightPDF" | bc`
|
||||
# compute the maximum allowed resolution difference that can be cause by:
|
||||
# - the truncated PDF with/height in pt
|
||||
# - the precision of dpi value
|
||||
epsilon=`echo "scale=5;($widthCurImg*72/$widthPDF^2)+($heightCurImg*72/$heightPDF^2)+0.00002" | bc` # max inaccuracy due to truncation of PDF size in pt
|
||||
[ `echo "($dpi_x - $dpi_y) < $epsilon " | bc` -eq 0 -o `echo "($dpi_y - $dpi_x) < $epsilon " | bc` -eq 0 ] \
|
||||
&& echo "Resolutions difference ($dpi_x/$dpi_y) higher than expected ($epsilon). Exiting..." >&2 && exit $EXIT_BAD_INPUT_FILE
|
||||
dpi=`echo "scale=5;($dpi_x+$dpi_y)/2+0.5" | bc` # adding 0.5 is required for rounding
|
||||
dpi=`echo "scale=0;$dpi/1" | bc` # round to the nearest integer
|
||||
|
||||
# Identify if page image should be saved as ppm (color) or pgm (gray)
|
||||
ext="ppm"
|
||||
opt=""
|
||||
if [ $colorspaceCurImg = "Gray" ]; then
|
||||
ext="pgm"
|
||||
opt="-gray"
|
||||
fi
|
||||
curImgPixmap="$TMP_FLD/$page.$ext"
|
||||
curImgPixmapDeskewed="$TMP_FLD/$page.deskewed.$ext"
|
||||
curImgPixmapClean="$TMP_FLD/$page.cleaned.$ext"
|
||||
|
||||
# extract current page as image with right orientation and resoltution
|
||||
[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Page $page: Extracting image as $ext file (${dpi} dpi)"
|
||||
! pdftoppm -f $page -l $page -r $dpi $opt "$FILE_INPUT_PDF" > "$curImgPixmap" \
|
||||
&& echo "Could not extract page $page as $ext from \"$FILE_INPUT_PDF\". Exiting..." >&2 && exit $EXIT_OTHER_ERROR
|
||||
|
||||
# if requested deskew image (without changing its size in pixel)
|
||||
if [ "$PREPROCESS_DESKEW" -eq "1" ]; then
|
||||
[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Page $page: Deskewing image"
|
||||
! convert "$curImgPixmap" -deskew 40% -gravity center -extent ${widthCurImg}x${heightCurImg} "$curImgPixmapDeskewed" \
|
||||
&& echo "Could not deskew \"$curImgPixmap\". Exiting..." >&2 && exit $EXIT_OTHER_ERROR
|
||||
else
|
||||
cp "$curImgPixmap" "$curImgPixmapDeskewed"
|
||||
fi
|
||||
|
||||
# if requested clean image with unpaper to get better OCR results
|
||||
if [ "$PREPROCESS_CLEAN" -eq "1" ]; then
|
||||
[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Page $page: Cleaning image with unpaper"
|
||||
! unpaper --dpi $dpi --mask-scan-size 100 \
|
||||
--no-deskew --no-grayfilter --no-blackfilter --no-mask-center --no-border-align \
|
||||
"$curImgPixmapDeskewed" "$curImgPixmapClean" 1> /dev/null \
|
||||
&& echo "Could not clean \"$curImgPixmapDeskewed\". Exiting..." >&2 && exit $EXIT_OTHER_ERROR
|
||||
else
|
||||
cp "$curImgPixmapDeskewed" "$curImgPixmapClean"
|
||||
fi
|
||||
|
||||
# perform OCR
|
||||
[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Page $page: Performing OCR"
|
||||
! tesseract -l "$LAN" "$curImgPixmapClean" "$curHocr" hocr $TESS_CFG_FILES 1> /dev/null 2> /dev/null \
|
||||
&& echo "Could not OCR file \"$curImgPixmapClean\". Exiting..." >&2 && exit $EXIT_OTHER_ERROR
|
||||
mv "$curHocr.html" "$curHocr"
|
||||
|
||||
# embed text and image to new pdf file
|
||||
if [ "$PREPROCESS_CLEANTOPDF" -eq "1" ]; then
|
||||
image4finalPDF="$curImgPixmapClean"
|
||||
else
|
||||
image4finalPDF="$curImgPixmapDeskewed"
|
||||
fi
|
||||
[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Page $page: Embedding text in PDF"
|
||||
! python $SRC/hocrTransform.py -r $dpi -i "$image4finalPDF" "$curHocr" "$curOCRedPDF" \
|
||||
&& echo "Could not create PDF file from \"$curHocr\". Exiting..." >&2 && exit $EXIT_OTHER_ERROR
|
||||
|
||||
# if requested generate special debug PDF page with visible OCR text
|
||||
if [ $PDF_NOIMG -eq "1" ] ; then
|
||||
[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Page $page: Embedding text in PDF (debug page)"
|
||||
! python $SRC/hocrTransform.py -b -r $dpi "$curHocr" "$curOCRedPDFDebug" \
|
||||
&& echo "Could not create PDF file from \"$curHocr\". Exiting..." >&2 && exit $EXIT_OTHER_ERROR
|
||||
fi
|
||||
|
||||
# delete temporary files created for the current page
|
||||
# to avoid using to much disk space in case of PDF files having many pages
|
||||
if [ $KEEP_TMP -eq 0 ]; then
|
||||
rm "$curOrigImg"*.*
|
||||
rm "$curHocr"
|
||||
rm "$curImgPixmap"
|
||||
rm "$curImgPixmapDeskewed"
|
||||
rm "$curImgPixmapClean"
|
||||
fi
|
||||
|
||||
done < "$FILE_SIZE_PAGES"
|
||||
|
||||
|
||||
|
||||
|
||||
# concatenate all pages
|
||||
[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Output file: Concatenating all pages"
|
||||
! pdftk "${TMP_FLD}/"*-ocred.pdf cat output "$FILE_OUTPUT_PDF_CAT" \
|
||||
&& echo "Could not concatenate individual PDF pages (\"${TMP_FLD}/*-ocred.pdf\") to one file. Exiting..." >&2 && exit $EXIT_OTHER_ERROR
|
||||
|
||||
# convert the pdf file to match PDF/A format
|
||||
[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Output file: Converting to PDF/A"
|
||||
! gs -dQUIET -dPDFA -dBATCH -dNOPAUSE -dUseCIEColor \
|
||||
-sProcessColorModel=DeviceCMYK -sDEVICE=pdfwrite -sPDFACompatibilityPolicy=2 \
|
||||
-sOutputFile="$FILE_OUTPUT_PDFA" "$FILE_OUTPUT_PDF_CAT" 1> /dev/null 2> /dev/null \
|
||||
&& echo "Could not convert PDF file \"$FILE_OUTPUT_PDF_CAT\" to PDF/A. Exiting..." >&2 && exit $EXIT_OTHER_ERROR
|
||||
|
||||
# # Write metadata
|
||||
# # Needs to be done after converting to PDF/A, as gs does not preserve metadata
|
||||
# [ $VERBOSITY -ge $LOG_DEBUG ] && echo "Output file: Update metadata (creator, producer, and title)"
|
||||
# title=`basename "$FILE_INPUT_PDF" | sed 's/[.][^.]*//' | \
|
||||
# sed 's/_/ /g' | sed 's/-/ /g' | \
|
||||
# sed 's/\([[:lower:]]\)\([[:upper:]]\)/\1 \2/g' | \
|
||||
# sed 's/\([[:alpha:]]\)\([[:digit:]]\)/\1 \2/g' | \
|
||||
# sed 's/\([[:digit:]]\)\([[:alpha:]]\)/\1 \2/g'` # transform the file name (with extension) into distinct words
|
||||
# pdftk "$FILE_OUTPUT_PDFA_WO_META" update_info_utf8 - output "$FILE_OUTPUT_PDFA" << EOF
|
||||
# InfoBegin
|
||||
# InfoKey: Title
|
||||
# InfoValue: $title
|
||||
# InfoBegin
|
||||
# InfoKey: Creator
|
||||
# InfoValue: $TOOLNAME $VERSION
|
||||
# InfoBegin
|
||||
# InfoKey: Producer
|
||||
# InfoValue: ghostcript `gs --version`, pdftk
|
||||
# EOF
|
||||
|
||||
# validate generated pdf file (compliance to PDF/A)
|
||||
[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Output file: Checking compliance to PDF/A standard"
|
||||
java -jar "$JHOVE" -c "$JHOVE_CFG" -m PDF-hul "$FILE_OUTPUT_PDFA" > "$FILE_VALIDATION_LOG"
|
||||
grep -i "Status|Message" "$FILE_VALIDATION_LOG" # summary of the validation
|
||||
[ $VERBOSITY -ge $LOG_DEBUG ] && echo "The full validation log is available here: \"$FILE_VALIDATION_LOG\""
|
||||
# check the validation results
|
||||
pdf_valid=1
|
||||
grep -i 'ErrorMessage' "$FILE_VALIDATION_LOG" >&2 && pdf_valid=0
|
||||
grep -i 'Status.*not valid' "$FILE_VALIDATION_LOG" >&2 && pdf_valid=0
|
||||
grep -i 'Status.*Not well-formed' "$FILE_VALIDATION_LOG" >&2 && pdf_valid=0
|
||||
! grep -i 'Profile:.*PDF/A-1' "$FILE_VALIDATION_LOG" > /dev/null && echo "PDF file profile is not PDF/A-1" >&2 && pdf_valid=0
|
||||
[ $pdf_valid -ne 1 ] && echo "Output file: The generated PDF/A file is INVALID" >&2
|
||||
[ $pdf_valid -ne 0 ] && [ $VERBOSITY -ge $LOG_INFO ] && echo "Output file: The generated PDF/A file is VALID"
|
||||
|
||||
|
||||
|
||||
|
||||
# delete temporary files
|
||||
if [ $KEEP_TMP -eq 0 ]; then
|
||||
[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Deleting temporary files"
|
||||
rm -r -f "${TMP_FLD}"
|
||||
fi
|
||||
|
||||
|
||||
END=`date +%s`
|
||||
[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Script took $(($END-$START)) seconds"
|
||||
|
||||
|
||||
[ $pdf_valid -ne 1 ] && exit $EXIT_INVALID_OUPUT_PDFA || exit 0
|
||||
@@ -1,138 +1,42 @@
|
||||
<img src="docs/images/logo.svg" width="240" alt="OCRmyPDF">
|
||||
OCRmyPDF
|
||||
========
|
||||
|
||||
[![Build Status][azure]](https://dev.azure.com/jim0585/ocrmypdf/_build/latest?definitionId=2&branchName=master) [![PyPI version][pypi]](https://pypi.org/project/ocrmypdf/) ![Homebrew version][homebrew] ![ReadTheDocs][docs] ![Python versions][pyversions]
|
||||
OCRmyPDF adds an OCR text layer to scanned PDF files, allowing them to be searched
|
||||
|
||||
[azure]: https://dev.azure.com/jim0585/ocrmypdf/_apis/build/status/jbarlow83.OCRmyPDF?branchName=master
|
||||
[travis]: https://travis-ci.org/jbarlow83/OCRmyPDF.svg?branch=master "Travis build status"
|
||||
[pypi]: https://img.shields.io/pypi/v/ocrmypdf.svg "PyPI version"
|
||||
[homebrew]: https://img.shields.io/homebrew/v/ocrmypdf.svg "Homebrew version"
|
||||
[docs]: https://readthedocs.org/projects/ocrmypdf/badge/?version=latest "RTD"
|
||||
[pyversions]: https://img.shields.io/pypi/pyversions/ocrmypdf "Supported Python versions"
|
||||
To get the script usage, call: sh ./OCRmyPDF.sh -h
|
||||
|
||||
OCRmyPDF adds an OCR text layer to scanned PDF files, allowing them to be searched or copy-pasted.
|
||||
Features
|
||||
--------
|
||||
|
||||
```bash
|
||||
ocrmypdf # it's a scriptable command line program
|
||||
-l eng+fra # it supports multiple languages
|
||||
--rotate-pages # it can fix pages that are misrotated
|
||||
--deskew # it can deskew crooked PDFs!
|
||||
--title "My PDF" # it can change output metadata
|
||||
--jobs 4 # it uses multiple cores by default
|
||||
--output-type pdfa # it produces PDF/A by default
|
||||
input_scanned.pdf # takes PDF input (or images)
|
||||
output_searchable.pdf # produces validated PDF output
|
||||
```
|
||||
- Generate a searchable PDF/A file from a PDF file containing only images
|
||||
- Place OCRed text accurately below the image to easy copy / paste
|
||||
- Keep the exact resolution of the original embedded images
|
||||
- If requested deskew and / or clean the image before performing OCR
|
||||
- Validate the generated file against the PDF/A specification using jhove
|
||||
- Provides debug mode to enable easy verification of the OCR results
|
||||
|
||||
[See the release notes for details on the latest changes](https://ocrmypdf.readthedocs.io/en/latest/release_notes.html).
|
||||
|
||||
## Main features
|
||||
|
||||
- Generates a searchable [PDF/A](https://en.wikipedia.org/?title=PDF/A) file from a regular PDF
|
||||
- Places OCR text accurately below the image to ease copy / paste
|
||||
- Keeps the exact resolution of the original embedded images
|
||||
- When possible, inserts OCR information as a "lossless" operation without disrupting any other content
|
||||
- Optimizes PDF images, often producing files smaller than the input file
|
||||
- If requested, deskews and/or cleans the image before performing OCR
|
||||
- Validates input and output files
|
||||
- Distributes work across all available CPU cores
|
||||
- Uses [Tesseract OCR](https://github.com/tesseract-ocr/tesseract) engine to recognize more than [100 languages](https://github.com/tesseract-ocr/tessdata)
|
||||
- Scales properly to handle files with thousands of pages
|
||||
- Battle-tested on millions of PDFs
|
||||
|
||||
For details: please consult the [documentation](https://ocrmypdf.readthedocs.io/en/latest/).
|
||||
|
||||
## Motivation
|
||||
|
||||
I searched the web for a free command line tool to OCR PDF files: I found many, but none of them were really satisfying:
|
||||
Motivation
|
||||
----------
|
||||
|
||||
I searched the web for a free command line tool to OCR PDF files on linux/unix:
|
||||
I found many, but none of them were really satisfying.
|
||||
- Either they produced PDF files with misplaced text under the image (making copy/paste impossible)
|
||||
- Or they did not handle accents and multilingual characters
|
||||
- Or they did not display correctly some escaped html characters located in the hocr file produced by the OCR engine
|
||||
- Or they changed the resolution of the embedded images
|
||||
- Or they generated ridiculously large PDF files
|
||||
- Or they crashed when trying to OCR
|
||||
- Or they did not produce valid PDF files
|
||||
- On top of that none of them produced PDF/A files (format dedicated for long time storage)
|
||||
- Or they generated PDF file having a ridiculous big size
|
||||
- Or they crashed when trying to OCR some of my PDF files
|
||||
- Or they did not produce valid PDF files (even though they were readable with my current PDF reader)
|
||||
- On top of that none of them produced PDF/A files (format dedicated for long time storage / archiving)
|
||||
|
||||
...so I decided to develop my own tool.
|
||||
... so I decided to develop my own tool (using various existing scripts as an inspiration)
|
||||
|
||||
## Installation
|
||||
Install
|
||||
--------
|
||||
|
||||
Linux, Windows, macOS and FreeBSD are supported. Docker images are also available.
|
||||
Download OCRmyPDF here: https://github.com/fritz-hh/OCRmyPDF/tags
|
||||
|
||||
Users of Debian 9 or later or Ubuntu 16.10 or later may simply
|
||||
Copy the file in onto your linux/unix machine and extract it.
|
||||
|
||||
```bash
|
||||
apt-get install ocrmypdf
|
||||
```
|
||||
Run: "sh ./OCRmyPDF.sh -h" to get the script usage
|
||||
|
||||
and users of Fedora 29 or later may simply
|
||||
|
||||
```bash
|
||||
dnf install ocrmypdf
|
||||
```
|
||||
|
||||
and Homebrew users (macOS, Linux, Windows Subsystem for Linux) may simply
|
||||
|
||||
```bash
|
||||
brew install ocrmypdf
|
||||
```
|
||||
|
||||
For everyone else, [see our documentation](https://ocrmypdf.readthedocs.io/en/latest/installation.html) for installation steps.
|
||||
|
||||
## Languages
|
||||
|
||||
OCRmyPDF uses Tesseract for OCR, and relies on its language packs. For Linux users, you can often find packages that provide language packs:
|
||||
|
||||
```bash
|
||||
# Display a list of all Tesseract language packs
|
||||
apt-cache search tesseract-ocr
|
||||
|
||||
# Debian/Ubuntu users
|
||||
apt-get install tesseract-ocr-chi-sim # Example: Install Chinese Simplified language pack
|
||||
|
||||
# Arch Linux users
|
||||
pacman -S tesseract-data-eng tesseract-data-deu # Example: Install the English and German language packs
|
||||
```
|
||||
|
||||
You can then pass the `-l LANG` argument to OCRmyPDF to give a hint as to what languages it should search for. Multiple languages can be requested.
|
||||
|
||||
## Documentation and support
|
||||
|
||||
Once OCRmyPDF is installed, the built-in help which explains the command syntax and options can be accessed via:
|
||||
|
||||
```bash
|
||||
ocrmypdf --help
|
||||
```
|
||||
|
||||
Our [documentation is served on Read the Docs](https://ocrmypdf.readthedocs.io/en/latest/index.html).
|
||||
|
||||
Please report issues on our [GitHub issues](https://github.com/jbarlow83/OCRmyPDF/issues) page, and follow the issue template for quick response.
|
||||
|
||||
## Requirements
|
||||
|
||||
In addition to the required Python version (3.6+), OCRmyPDF requires external program installations of Ghostscript, Tesseract OCR, QPDF, and Leptonica. OCRmyPDF is pure Python, but uses CFFI to portably generate library bindings. OCRmyPDF works on pretty much everything: Linux, macOS, Windows and FreeBSD.
|
||||
|
||||
## Press & Media
|
||||
|
||||
- [Going paperless with OCRmyPDF](https://medium.com/@ikirichenko/going-paperless-with-ocrmypdf-e2f36143f46a)
|
||||
- [Converting a scanned document into a compressed searchable PDF with redactions](https://medium.com/@treyharris/converting-a-scanned-document-into-a-compressed-searchable-pdf-with-redactions-63f61c34fe4c)
|
||||
- [c't 1-2014, page 59](https://heise.de/-2279695): Detailed presentation of OCRmyPDF v1.0 in the leading German IT magazine c't
|
||||
- [heise Open Source, 09/2014: Texterkennung mit OCRmyPDF](https://heise.de/-2356670)
|
||||
- [heise Durchsuchbare PDF-Dokumente mit OCRmyPDF erstellen](https://www.heise.de/ratgeber/Durchsuchbare-PDF-Dokumente-mit-OCRmyPDF-erstellen-4607592.html)
|
||||
- [Excellent Utilities: OCRmyPDF](https://www.linuxlinks.com/excellent-utilities-ocrmypdf-add-ocr-text-layer-scanned-pdfs/)
|
||||
|
||||
## Business enquiries
|
||||
|
||||
OCRmyPDF would not be the software that it is today without companies and users choosing to provide support for feature development and consulting enquiries. We are happy to discuss all enquiries, whether for extending the existing feature set, or integrating OCRmyPDF into a larger system.
|
||||
|
||||
## License
|
||||
|
||||
The OCRmyPDF software is licensed under the GNU GPLv3. Certain files are covered by other licenses, as noted in their source files.
|
||||
|
||||
The license for each test file varies, and is noted in tests/resources/README.rst. The documentation is licensed under Creative Commons Attribution-ShareAlike 4.0 (CC-BY-SA 4.0).
|
||||
|
||||
OCRmyPDF versions prior to 6.0 were distributed under the MIT License.
|
||||
|
||||
## Disclaimer
|
||||
|
||||
The software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
If not yet installed, the script will notify you about dependencies that need to be installed
|
||||
|
||||
@@ -0,0 +1,143 @@
|
||||
RELEASE NOTES
|
||||
=============
|
||||
|
||||
Please always read this file before installing the package
|
||||
|
||||
Download software here: https://github.com/fritz-hh/OCRmyPDF/tags
|
||||
|
||||
v1.1-stable (2014-01-06):
|
||||
====
|
||||
|
||||
New features
|
||||
------------
|
||||
|
||||
- N/A
|
||||
|
||||
Changes
|
||||
-------
|
||||
|
||||
- N/A
|
||||
|
||||
Fixes
|
||||
-----
|
||||
|
||||
- Fixed syntax error (bashism) leading to an error message on certain systems (fixes #42)
|
||||
|
||||
Tested with
|
||||
-----------
|
||||
|
||||
- Operating system: FreeBSD 9.1
|
||||
- Dependencies:
|
||||
- poppler-utils 0.22.2
|
||||
- ImageMagick 6.8.0-7 2013-03-30
|
||||
- Unpaper 0.3
|
||||
- tesseract 3.02.02
|
||||
- Python 2.7.3
|
||||
- pdftk 1.45
|
||||
- ghoscript (gs): 9.06
|
||||
- java: openjdk version "1.7.0_17"
|
||||
|
||||
v1.0-stable (2013-05-06):
|
||||
====
|
||||
|
||||
New features
|
||||
------------
|
||||
|
||||
- In debug mode: compute and echo time required for processing (fixes #26)
|
||||
|
||||
Changes
|
||||
-------
|
||||
|
||||
- Removed feature to add metadata in final pdf file (because it lead to to final PDF file that does not comply to the PDF/A-1 format)
|
||||
- Removed feature to set same owner & permissions in final PDF file than in input file
|
||||
- Removed many unused jhove files (e.g. documentation, *.java and *.class files)
|
||||
|
||||
Fixes
|
||||
-----
|
||||
|
||||
- Correction to handle correctly path and input PDF files having spaces (fixes #31)
|
||||
- Resolutions (x/y) that are nearly equal are now supported (fixes #25)
|
||||
- Fix compatibility issue with Ubuntu server 12.04 / Ubuntu server 10.04 / Linux Mint 13 Maya and probably other Linux distributions (fixes #27)
|
||||
- Commit missing jhove files (*.jar mainly) due to wrong .gitignore
|
||||
|
||||
Tested with
|
||||
-----------
|
||||
|
||||
- Operating system: FreeBSD 9.1
|
||||
- Dependencies:
|
||||
- poppler-utils 0.22.2
|
||||
- ImageMagick 6.8.0-7 2013-03-30
|
||||
- Unpaper 0.3
|
||||
- tesseract 3.02.02
|
||||
- Python 2.7.3
|
||||
- pdftk 1.45
|
||||
- ghoscript (gs): 9.06
|
||||
- java: openjdk version "1.7.0_17"
|
||||
|
||||
v1.0-rc2 (2013-04-29):
|
||||
====
|
||||
|
||||
New features
|
||||
------------
|
||||
|
||||
- Keep temporary files if debug mode is set (fixes #22)
|
||||
- Set same owner & permissions in final PDF file than in input file (fixes #9)
|
||||
- Added metadata in final pdf file (fixes #4)
|
||||
|
||||
Changes
|
||||
-------
|
||||
|
||||
- N/A
|
||||
|
||||
Fixes
|
||||
-----
|
||||
|
||||
- Fixed wrong image cropping when deskew option is activated
|
||||
- Exit with error message if page size is not found in hocr file (fixes #21)
|
||||
- Various minor fixes in log messages
|
||||
|
||||
Tested with
|
||||
-----------
|
||||
|
||||
- Operating system: FreeBSD 9.1
|
||||
- Dependencies:
|
||||
- poppler-utils 0.22.2
|
||||
- ImageMagick 6.8.0-7 2013-03-30
|
||||
- Unpaper 0.3
|
||||
- tesseract 3.02.02
|
||||
- Python 2.7.3
|
||||
- pdftk 1.45
|
||||
- ghoscript (gs): 9.06
|
||||
- java: openjdk version "1.7.0_17"
|
||||
|
||||
v1.0-rc1 (2013-04-26):
|
||||
====
|
||||
|
||||
New features
|
||||
------------
|
||||
|
||||
- First release candidate
|
||||
|
||||
Changes
|
||||
-------
|
||||
|
||||
- N/A
|
||||
|
||||
Fixes
|
||||
-----
|
||||
|
||||
- N/A
|
||||
|
||||
Tested with
|
||||
-----------
|
||||
|
||||
- Operating system: FreeBSD 9.1
|
||||
- Dependencies:
|
||||
- poppler-utils 0.22.2
|
||||
- ImageMagick 6.8.0-7 2013-03-30
|
||||
- Unpaper 0.3
|
||||
- tesseract 3.02.02
|
||||
- Python 2.7.3
|
||||
- pdftk 1.45
|
||||
- ghoscript (gs): 9.06
|
||||
- java: openjdk version "1.7.0_17"
|
||||
@@ -1,259 +0,0 @@
|
||||
trigger:
|
||||
tags:
|
||||
include:
|
||||
- v*
|
||||
branches:
|
||||
include:
|
||||
- "*"
|
||||
exclude:
|
||||
- "travis"
|
||||
|
||||
stages:
|
||||
- stage: "Test"
|
||||
jobs:
|
||||
- job: Windows
|
||||
pool:
|
||||
vmImage: "vs2017-win2016"
|
||||
strategy:
|
||||
matrix:
|
||||
Python36:
|
||||
python.version: "3.6"
|
||||
Python37:
|
||||
python.version: "3.7"
|
||||
Python38:
|
||||
python.version: "3.8"
|
||||
steps:
|
||||
- task: UsePythonVersion@0
|
||||
inputs:
|
||||
versionSpec: "$(python.version)"
|
||||
- pwsh: |
|
||||
choco install --yes --no-progress --pre tesseract
|
||||
choco install --yes --no-progress python3
|
||||
choco install --yes --no-progress ghostscript
|
||||
choco install --yes --no-progress pngquant
|
||||
displayName: "Install system packages"
|
||||
- pwsh: |
|
||||
refreshenv
|
||||
python -m pip install --upgrade pip wheel
|
||||
python -m pip install -r requirements/main.txt -r requirements/test.txt .
|
||||
displayName: "Install Python packages"
|
||||
- pwsh: |
|
||||
refreshenv
|
||||
$env:pathext += ';.py'
|
||||
# -n auto helps Windows
|
||||
python -m pytest -n auto --junitxml=test.xml --cov=ocrmypdf --cov-report=xml
|
||||
displayName: "Test"
|
||||
- task: PublishTestResults@2
|
||||
inputs:
|
||||
testResultsFiles: "test.xml"
|
||||
testRunTitle: "$(Agent.OS) - $(Build.DefinitionName) - Python $(python.version)"
|
||||
condition: succeededOrFailed()
|
||||
- job: "Ubuntu_1804"
|
||||
pool:
|
||||
vmImage: "ubuntu-18.04"
|
||||
strategy:
|
||||
matrix:
|
||||
Python36:
|
||||
python.version: "3.6"
|
||||
Python37:
|
||||
python.version: "3.7"
|
||||
Python38:
|
||||
python.version: "3.8"
|
||||
steps:
|
||||
- task: UsePythonVersion@0
|
||||
inputs:
|
||||
versionSpec: "$(python.version)"
|
||||
- bash: |
|
||||
sudo apt-get update
|
||||
sudo apt-get install -y --no-install-recommends \
|
||||
python3-software-properties \
|
||||
curl \
|
||||
ghostscript \
|
||||
img2pdf \
|
||||
libexempi3 \
|
||||
libffi-dev \
|
||||
liblept5 \
|
||||
libsm6 libxext6 libxrender-dev \
|
||||
pngquant \
|
||||
poppler-utils \
|
||||
tesseract-ocr \
|
||||
tesseract-ocr-deu \
|
||||
tesseract-ocr-eng \
|
||||
unpaper \
|
||||
zlib1g
|
||||
displayName: "Install system packages"
|
||||
- bash: |
|
||||
curl https://bootstrap.pypa.io/get-pip.py | python3
|
||||
pip3 install -r requirements/main.txt -r requirements/test.txt .
|
||||
displayName: "Install Python packages"
|
||||
- bash: |
|
||||
tesseract --version
|
||||
displayName: "Record versions"
|
||||
- bash: |
|
||||
# -n auto is slower on Linux and breaks on Python 3.8
|
||||
pytest -n0 --junitxml=test.xml --cov=ocrmypdf --cov-report=xml
|
||||
displayName: "Test"
|
||||
- task: PublishTestResults@2
|
||||
inputs:
|
||||
testResultsFiles: "test.xml"
|
||||
testRunTitle: "$(Agent.OS) - $(Build.DefinitionName) - Python $(python.version)"
|
||||
condition: succeededOrFailed()
|
||||
- job: "Ubuntu_1604"
|
||||
pool:
|
||||
vmImage: "ubuntu-16.04"
|
||||
strategy:
|
||||
matrix:
|
||||
Python36:
|
||||
python.version: "3.6"
|
||||
steps:
|
||||
- task: UsePythonVersion@0
|
||||
inputs:
|
||||
versionSpec: "$(python.version)"
|
||||
- bash: |
|
||||
sudo apt-get update
|
||||
sudo apt-get install -y --no-install-recommends \
|
||||
software-properties-common
|
||||
sudo add-apt-repository -y ppa:alex-p/tesseract-ocr
|
||||
sudo apt-get update
|
||||
sudo apt-get install -y --no-install-recommends \
|
||||
ghostscript \
|
||||
img2pdf \
|
||||
libexempi3 \
|
||||
libffi-dev \
|
||||
liblept5 \
|
||||
libsm6 libxext6 libxrender-dev \
|
||||
pngquant \
|
||||
poppler-utils \
|
||||
tesseract-ocr \
|
||||
tesseract-ocr-deu \
|
||||
tesseract-ocr-eng \
|
||||
unpaper \
|
||||
zlib1g
|
||||
displayName: "Install system packages"
|
||||
- bash: |
|
||||
curl https://bootstrap.pypa.io/get-pip.py | python3
|
||||
pip3 install -r requirements/main.txt -r requirements/test.txt .
|
||||
displayName: "Install Python packages"
|
||||
- bash: |
|
||||
tesseract --version
|
||||
displayName: "Record versions"
|
||||
- bash: |
|
||||
# -n auto is slower on Linux and breaks on Python 3.8
|
||||
pytest -n0 --junitxml=test.xml --cov=ocrmypdf --cov-report=xml
|
||||
displayName: "Test"
|
||||
- task: PublishTestResults@2
|
||||
inputs:
|
||||
testResultsFiles: "test.xml"
|
||||
testRunTitle: "$(Agent.OS) - $(Build.DefinitionName) - Python $(python.version)"
|
||||
condition: succeededOrFailed()
|
||||
- job: "macOS_Mojave"
|
||||
pool:
|
||||
vmImage: "macos-10.14"
|
||||
strategy:
|
||||
matrix:
|
||||
Python37:
|
||||
python.version: ""
|
||||
Python38:
|
||||
python.version: "python@3.8"
|
||||
steps:
|
||||
# https://github.com/actions/virtual-environments/issues/664
|
||||
# - task: UsePythonVersion@0
|
||||
# inputs:
|
||||
# versionSpec: "$(python.version)"
|
||||
- bash: |
|
||||
brew update
|
||||
brew unlink python@2
|
||||
if [ "$(python.version)" != "" ]; then
|
||||
brew upgrade $(python.version)
|
||||
else
|
||||
echo "Using Python `python3 --version`"
|
||||
fi
|
||||
displayName: "Update brew and Python"
|
||||
- bash: |
|
||||
brew install \
|
||||
exempi \
|
||||
ghostscript \
|
||||
jbig2enc \
|
||||
leptonica \
|
||||
openjpeg \
|
||||
pngquant \
|
||||
tesseract \
|
||||
unpaper
|
||||
displayName: "Install system packages"
|
||||
- bash: |
|
||||
pip3 install --upgrade pip
|
||||
pip3 install -r requirements/main.txt -r requirements/test.txt .
|
||||
displayName: "Install Python packages"
|
||||
- bash: |
|
||||
tesseract --version
|
||||
displayName: "Record versions"
|
||||
- bash: pytest -nauto --junitxml=test.xml --cov=ocrmypdf --cov-report=xml
|
||||
displayName: "Test"
|
||||
- task: PublishTestResults@2
|
||||
inputs:
|
||||
testResultsFiles: "test.xml"
|
||||
testRunTitle: "$(Agent.OS) - $(Build.DefinitionName) - Python $(python.version)"
|
||||
condition: succeededOrFailed()
|
||||
- task: PublishCodeCoverageResults@1
|
||||
inputs:
|
||||
codeCoverageTool: Cobertura
|
||||
summaryFileLocation: "$(System.DefaultWorkingDirectory)/**/coverage.xml"
|
||||
|
||||
- stage: "Artifacts"
|
||||
jobs:
|
||||
- job: "sdist_wheel"
|
||||
pool:
|
||||
vmImage: "ubuntu-18.04"
|
||||
steps:
|
||||
- task: UsePythonVersion@0
|
||||
inputs:
|
||||
versionSpec: "3.7"
|
||||
- bash: |
|
||||
python -m pip install --upgrade pip wheel
|
||||
python setup.py sdist bdist_wheel
|
||||
- publish: dist
|
||||
artifact: sdist_wheel
|
||||
|
||||
- stage: "Deploy"
|
||||
jobs:
|
||||
- deployment: "PyPI"
|
||||
pool:
|
||||
vmImage: "ubuntu-18.04"
|
||||
environment: "deploy"
|
||||
strategy:
|
||||
runOnce:
|
||||
deploy:
|
||||
steps:
|
||||
- download: current
|
||||
artifact: sdist_wheel
|
||||
- script: |
|
||||
mkdir -p dist
|
||||
mv $(Pipeline.Workspace)/sdist_wheel/* dist
|
||||
displayName: "Move dist files"
|
||||
- task: UsePythonVersion@0
|
||||
inputs:
|
||||
versionSpec: "3.8"
|
||||
architecture: x64
|
||||
- script: |
|
||||
pip install --upgrade twine
|
||||
displayName: "Generate artifacts"
|
||||
- script: |
|
||||
cat <<FILE >.pypirc
|
||||
[distutils]
|
||||
index-servers =
|
||||
pypi
|
||||
|
||||
[pypi]
|
||||
username: __token__
|
||||
password: $(TOKEN_PYPI)
|
||||
|
||||
FILE
|
||||
displayName: "Generate PyPI auth file"
|
||||
- script: |
|
||||
python -m twine upload --config-file .pypirc dist/*
|
||||
displayName: "Upload to PyPI"
|
||||
condition: and(succeeded(), startsWith(variables['Build.SourceBranch'], 'refs/tags/'))
|
||||
- script: |
|
||||
curl -X POST -d "token=$(TOKEN_RTD)" https://readthedocs.org/api/v2/webhook/pikepdf/39557/
|
||||
displayName: "Trigger ReadTheDocs"
|
||||
condition: and(succeeded(), or(startsWith(variables['Build.SourceBranch'], 'refs/tags/'), startsWith(variables['Build.SourceBranch'], 'refs/heads/master')))
|
||||
Vendored
-2176
File diff suppressed because it is too large
Load Diff
@@ -1,345 +0,0 @@
|
||||
=================
|
||||
Advanced features
|
||||
=================
|
||||
|
||||
Control of unpaper
|
||||
==================
|
||||
|
||||
OCRmyPDF uses ``unpaper`` to provide the implementation of the
|
||||
``--clean`` and ``--clean-final`` arguments.
|
||||
`unpaper <https://github.com/Flameeyes/unpaper/blob/master/doc/basic-concepts.md>`__
|
||||
provides a variety of image processing filters to improve images.
|
||||
|
||||
By default, OCRmyPDF uses only ``unpaper`` arguments that were found to
|
||||
be safe to use on almost all files without having to inspect every page
|
||||
of the file afterwards. This is particularly true when only ``--clean``
|
||||
is used, since that instructs OCRmyPDF to only clean the image before
|
||||
OCR and not the final image.
|
||||
|
||||
However, if you wish to use the more aggressive options in ``unpaper``,
|
||||
you may use ``--unpaper-args '...'`` to override the OCRmyPDF's defaults
|
||||
and forward other arguments to unpaper. This option will forward
|
||||
arguments to ``unpaper`` without any knowledge of what that program
|
||||
considers to be valid arguments. The string of arguments must be quoted
|
||||
as shown in the examples below. No filename arguments may be included.
|
||||
OCRmyPDF will assume it can append input and output filename of
|
||||
intermediate images to the ``--unpaper-args`` string.
|
||||
|
||||
In this example, we tell ``unpaper`` to expect two pages of text on a
|
||||
sheet (image), such as occurs when two facing pages of a book are
|
||||
scanned. ``unpaper`` uses this information to deskew each independently
|
||||
and clean up the margins of both.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
ocrmypdf --clean --clean-final --unpaper-args '--layout double' input.pdf output.pdf
|
||||
ocrmypdf --clean --clean-final --unpaper-args '--layout double --no-noisefilter' input.pdf output.pdf
|
||||
|
||||
.. warning::
|
||||
|
||||
Some ``unpaper`` features will reposition text within the image.
|
||||
``--clean-final`` is recommended to avoid this issue.
|
||||
|
||||
.. warning::
|
||||
|
||||
Some ``unpaper`` features cause multiple input or output files to be
|
||||
consumed or produced. OCRmyPDF requires ``unpaper`` to consume one
|
||||
file and produce one file. An deviation from that condition will
|
||||
result in errors.
|
||||
|
||||
.. note::
|
||||
|
||||
``unpaper`` uses uncompressed PBM/PGM/PPM files for its intermediate
|
||||
files. For large images or documents, it can take a lot of temporary
|
||||
disk space.
|
||||
|
||||
Control of OCR options
|
||||
======================
|
||||
|
||||
OCRmyPDF provides many features to control the behavior of the OCR
|
||||
engine, Tesseract.
|
||||
|
||||
When OCR is skipped
|
||||
-------------------
|
||||
|
||||
If a page in a PDF seems to have text, by default OCRmyPDF will exit
|
||||
without modifying the PDF. This is to ensure that PDFs that were
|
||||
previously OCRed or were "born digital" rather than scanned are not
|
||||
processed.
|
||||
|
||||
If ``--skip-text`` is issued, then no OCR will be performed on pages
|
||||
that already have text. The page will be copied to the output. This may
|
||||
be useful for documents that contain both "born digital" and scanned
|
||||
content, or to use OCRmyPDF to normalize and convert to PDF/A regardless
|
||||
of their contents.
|
||||
|
||||
If ``--redo-ocr`` is issued, then a detailed text analysis is performed.
|
||||
Text is categorized as either visible or invisible. Invisible text (OCR)
|
||||
is stripped out. Then an image of each page is created with visible text
|
||||
masked out. The page image is sent for OCR, and any additional text is
|
||||
inserted as OCR. If a file contains a mix of text and bitmap images that
|
||||
contain text, OCRmyPDF will locate the additional text in images without
|
||||
disrupting the existing text.
|
||||
|
||||
If ``--force-ocr`` is issued, then all pages will be rasterized to
|
||||
images, discarding any hidden OCR text, and rasterizing any printable
|
||||
text. This is useful for redoing OCR, for fixing OCR text with a damaged
|
||||
character map (text is selectable but not searchable), and destroying
|
||||
redacted information. Any forms and vector graphics will be rasterized
|
||||
as well.
|
||||
|
||||
Time and image size limits
|
||||
--------------------------
|
||||
|
||||
By default, OCRmyPDF permits tesseract to run for three minutes (180
|
||||
seconds) per page. This is usually more than enough time to find all
|
||||
text on a reasonably sized page with modern hardware.
|
||||
|
||||
If a page is skipped, it will be inserted without OCR. If preprocessing
|
||||
was requested, the preprocessed image layer will be inserted.
|
||||
|
||||
If you want to adjust the amount of time spent on OCR, change
|
||||
``--tesseract-timeout``. You can also automatically skip images that
|
||||
exceed a certain number of megapixels with ``--skip-big``. (A 300 DPI,
|
||||
8.5×11" page is 8.4 megapixels.)
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
# Allow 300 seconds for OCR; skip any page larger than 50 megapixels
|
||||
ocrmypdf --tesseract-timeout 300 --skip-big 50 bigfile.pdf output.pdf
|
||||
|
||||
Overriding default tesseract
|
||||
----------------------------
|
||||
|
||||
OCRmyPDF checks the system ``PATH`` for the ``tesseract`` binary.
|
||||
|
||||
Some relevant environment variables that influence Tesseract's behavior
|
||||
include:
|
||||
|
||||
.. envvar:: TESSDATA_PREFIX
|
||||
|
||||
Overrides the path to Tesseract's data files. This can allow
|
||||
simultaneous installation of the "best" and "fast" training data
|
||||
sets. OCRmyPDF does not manage this environment variable.
|
||||
|
||||
.. envvar:: OMP_THREAD_LIMIT
|
||||
|
||||
Controls the number of threads Tesseract will use. OCRmyPDF will
|
||||
manage this environment if it is not already set. (Currently, it will
|
||||
set it to 1 because this gives the best results in testing.)
|
||||
|
||||
For example, if you have a development build of Tesseract don't wish to
|
||||
use the system installation, you can launch OCRmyPDF as follows:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
env \
|
||||
PATH=/home/user/src/tesseract/api:$PATH \
|
||||
TESSDATA_PREFIX=/home/user/src/tesseract \
|
||||
ocrmypdf input.pdf output.pdf
|
||||
|
||||
In this example ``TESSDATA_PREFIX`` is required to redirect Tesseract to
|
||||
an alternate folder for its "tessdata" files.
|
||||
|
||||
Overriding other support programs
|
||||
---------------------------------
|
||||
|
||||
In addition to tesseract, OCRmyPDF uses the following external binaries:
|
||||
|
||||
- ``gs`` (Ghostscript)
|
||||
- ``unpaper``
|
||||
- ``pngquant``
|
||||
- ``jbig2``
|
||||
|
||||
In each case OCRmyPDF will search the ``PATH`` environment variable to
|
||||
locate the binaries.
|
||||
|
||||
Changing tesseract configuration variables
|
||||
------------------------------------------
|
||||
|
||||
You can override tesseract's default `control
|
||||
parameters <https://github.com/tesseract-ocr/tesseract/wiki/ControlParams>`__
|
||||
with a configuration file.
|
||||
|
||||
As an example, this configuration will disable Tesseract's dictionary
|
||||
for current language. Normally the dictionary is helpful for
|
||||
interpolating words that are unclear, but it may interfere with OCR if
|
||||
the document does not contain many words (for example, a list of part
|
||||
numbers).
|
||||
|
||||
Create a file named "no-dict.cfg" with these contents:
|
||||
|
||||
::
|
||||
|
||||
load_system_dawg 0
|
||||
language_model_penalty_non_dict_word 0
|
||||
language_model_penalty_non_freq_dict_word 0
|
||||
|
||||
then run ocrmypdf as follows (along with any other desired arguments):
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
ocrmypdf --tesseract-config no-dict.cfg input.pdf output.pdf
|
||||
|
||||
.. warning::
|
||||
|
||||
Some combinations of control parameters will break Tesseract or break
|
||||
assumptions that OCRmyPDF makes about Tesseract's output.
|
||||
|
||||
Changing the PDF renderer
|
||||
=========================
|
||||
|
||||
rasterizing
|
||||
Converting a PDF to an image for display.
|
||||
|
||||
rendering
|
||||
Creating a new PDF from other data (such as an existing PDF).
|
||||
|
||||
OCRmyPDF has these PDF renderers: ``sandwich`` and ``hocr``. The
|
||||
renderer may be selected using ``--pdf-renderer``. The default is
|
||||
``auto`` which lets OCRmyPDF select the renderer to use. Currently,
|
||||
``auto`` always selects ``sandwich``.
|
||||
|
||||
The ``sandwich`` renderer
|
||||
-------------------------
|
||||
|
||||
The ``sandwich`` renderer uses Tesseract's new text-only PDF feature,
|
||||
which produces a PDF page that lays out the OCR in invisible text. This
|
||||
page is then "sandwiched" onto the original PDF page, allowing lossless
|
||||
application of OCR even to PDF pages that contain other vector objects.
|
||||
|
||||
Currently this is the best renderer for most uses, however it is
|
||||
implemented in Tesseract so OCRmyPDF cannot influence it. Currently some
|
||||
problematic PDF viewers like Mozilla PDF.js and macOS Preview have
|
||||
problems with segmenting its text output, and
|
||||
mightrunseveralwordstogether.
|
||||
|
||||
When image preprocessing features like ``--deskew`` are used, the
|
||||
original PDF will be rendered as a full page and the OCR layer will be
|
||||
placed on top.
|
||||
|
||||
The ``hocr`` renderer
|
||||
---------------------
|
||||
|
||||
The ``hocr`` renderer works with older versions of Tesseract. The image
|
||||
layer is copied from the original PDF page if possible, avoiding
|
||||
potentially lossy transcoding or loss of other PDF information. If
|
||||
preprocessing is specified, then the image layer is a new PDF.
|
||||
|
||||
Unlike ``sandwich`` this renderer is implemented within OCRmyPDF; anyone
|
||||
looking to customize how OCR is presented should look here. A major
|
||||
disadvantage of this renderer is it not capable of correctly handling
|
||||
text outside the Latin alphabet. Pull requests to improve the situation
|
||||
are welcome.
|
||||
|
||||
Currently, this renderer has the best compatibility with Mozilla's
|
||||
PDF.js viewer.
|
||||
|
||||
This works in all versions of Tesseract.
|
||||
|
||||
The ``tesseract`` renderer
|
||||
--------------------------
|
||||
|
||||
The ``tesseract`` renderer was removed. OCRmyPDF's new approach to text
|
||||
layer grafting makes it functionally equivalent to ``sandwich``.
|
||||
|
||||
Return code policy
|
||||
==================
|
||||
|
||||
OCRmyPDF writes all messages to ``stderr``. ``stdout`` is reserved for
|
||||
piping output files. ``stdin`` is reserved for piping input files.
|
||||
|
||||
The return codes generated by the OCRmyPDF are considered part of the
|
||||
stable user interface. They may be imported from
|
||||
``ocrmypdf.exceptions``.
|
||||
|
||||
.. list-table:: Return codes
|
||||
:widths: 5 35 60
|
||||
:header-rows: 1
|
||||
|
||||
* - Code
|
||||
- Name
|
||||
- Interpretation
|
||||
* - 0
|
||||
- ``ExitCode.ok``
|
||||
- Everything worked as expected.
|
||||
* - 1
|
||||
- ``ExitCode.bad_args``
|
||||
- Invalid arguments, exited with an error.
|
||||
* - 2
|
||||
- ``ExitCode.input_file``
|
||||
- The input file does not seem to be a valid PDF.
|
||||
* - 3
|
||||
- ``ExitCode.missing_dependency``
|
||||
- An external program required by OCRmyPDF is missing.
|
||||
* - 4
|
||||
- ``ExitCode.invalid_output_pdf``
|
||||
- An output file was created, but it does not seem to be a valid PDF. The file will be available.
|
||||
* - 5
|
||||
- ``ExitCode.file_access_error``
|
||||
- The user running OCRmyPDF does not have sufficient permissions to read the input file and write the output file.
|
||||
* - 6
|
||||
- ``ExitCode.already_done_ocr``
|
||||
- The file already appears to contain text so it may not need OCR. See output message.
|
||||
* - 7
|
||||
- ``ExitCode.child_process_error``
|
||||
- An error occurred in an external program (child process) and OCRmyPDF cannot continue.
|
||||
* - 8
|
||||
- ``ExitCode.encrypted_pdf``
|
||||
- The input PDF is encrypted. OCRmyPDF does not read encrypted PDFs. Use another program such as ``qpdf`` to remove encryption.
|
||||
* - 9
|
||||
- ``ExitCode.invalid_config``
|
||||
- A custom configuration file was forwarded to Tesseract using ``--tesseract-config``, and Tesseract rejected this file.
|
||||
* - 10
|
||||
- ``ExitCode.pdfa_conversion_failed``
|
||||
- A valid PDF was created, PDF/A conversion failed. The file will be available.
|
||||
* - 15
|
||||
- ``ExitCode.other_error``
|
||||
- Some other error occurred.
|
||||
* - 130
|
||||
- ``ExitCode.ctrl_c``
|
||||
- The program was interrupted by pressing Ctrl+C.
|
||||
|
||||
|
||||
Debugging the intermediate files
|
||||
================================
|
||||
|
||||
OCRmyPDF normally saves its intermediate results to a temporary folder
|
||||
and deletes this folder when it exits, whether it succeeded or failed.
|
||||
|
||||
If the ``-k`` argument is issued on the command line, OCRmyPDF will keep
|
||||
the temporary folder and print the location, whether it succeeded or
|
||||
failed (provided the Python interpreter did not crash). An example
|
||||
message is:
|
||||
|
||||
.. code-block:: none
|
||||
|
||||
Temporary working files retained at:
|
||||
/tmp/com.github.ocrmypdf.u20wpz07
|
||||
|
||||
The organization of this folder is an implementation detail and subject
|
||||
to change between releases. However the general organization is that
|
||||
working files on a per page basis have the page number as a prefix
|
||||
(starting with page 1), an infix indicates the processing stage, and a
|
||||
suffix indicates the file type. Some important files include:
|
||||
|
||||
- ``_rasterize.png`` - what the input page looks like
|
||||
- ``_ocr.png`` - the file that is sent to Tesseract for OCR; depending
|
||||
on arguments this may differ from the presentation image
|
||||
- ``_pp_deskew.png`` - the image, after deskewing
|
||||
- ``_pp_clean.png`` - the image, after cleaning with unpaper
|
||||
- ``_ocr_tess.pdf`` - the OCR file; appears as a blank page with invisible
|
||||
text embedded
|
||||
- ``_ocr_tess.txt`` - the OCR text (not necessarily all text on the page,
|
||||
if the page is mixed format)
|
||||
- ``fix_docinfo.pdf`` - a temporary file created to fix the PDF DocumentInfo
|
||||
data structure
|
||||
- ``graft_layers.pdf`` - the rendered PDF with OCR layers grafted on
|
||||
- ``pdfa.pdf`` - ``graft_layers.pdf`` after conversion to PDF/A
|
||||
- ``pdfa.ps`` - a PostScript file used by Ghostscript for PDF/A conversion
|
||||
- ``optimize.pdf`` - the PDF generated before optimization
|
||||
- ``optimize.out.pdf`` - the PDF generated by optimization
|
||||
- ``origin`` - the input file
|
||||
- ``origin.pdf`` - the input file or the input image converted to PDF
|
||||
- ``images/*`` - images extracted during the optimization process; here
|
||||
the prefix indicates a PDF object ID not a page number
|
||||
-112
@@ -1,112 +0,0 @@
|
||||
======================
|
||||
Using the OCRmyPDF API
|
||||
======================
|
||||
|
||||
OCRmyPDF originated as a command line program and continues to have this
|
||||
legacy, but parts of it can be imported and used in other Python
|
||||
applications.
|
||||
|
||||
Some applications may want to consider running ocrmypdf from a
|
||||
subprocess call anyway, as this provides isolation of its activities.
|
||||
|
||||
Example
|
||||
=======
|
||||
|
||||
OCRmyPDF one high-level function to run its main engine from an
|
||||
application. The parameters are symmetric to the command line arguments
|
||||
and largely have the same functions.
|
||||
|
||||
.. code-block:: python
|
||||
|
||||
import ocrmypdf
|
||||
|
||||
ocrmypdf.ocr('input.pdf', 'output.pdf', deskew=True)
|
||||
|
||||
With a few exceptions, all of the command line arguments are available
|
||||
and may be passed as equivalent keywords.
|
||||
|
||||
A few differences are that ``verbose`` and ``quiet`` are not available.
|
||||
Instead, output should be managed by configuring logging.
|
||||
|
||||
Parent process requirements
|
||||
---------------------------
|
||||
|
||||
The :func:`ocrmypdf.ocr` function runs OCRmyPDF similar to command line
|
||||
execution. To do this, it will:
|
||||
|
||||
- create a monitoring thread
|
||||
- create worker processes (forking itself)
|
||||
- manage the signal flags of worker processes
|
||||
- execute other subprocesses (forking and executing other programs)
|
||||
|
||||
The Python process that calls ``ocrmypdf.ocr()`` must be sufficiently
|
||||
privileged to perform these actions. If it is not, ``ocrmypdf()`` will
|
||||
fail.
|
||||
|
||||
There is no currently no option to manage how jobs are scheduled other
|
||||
than the argument ``jobs=`` which will limit the number of worker
|
||||
processes.
|
||||
|
||||
Forking a child process to call ``ocrmypdf.ocr()`` is suggested. That
|
||||
way your application will survive and remain interactive even if
|
||||
OCRmyPDF does not.
|
||||
|
||||
Programs that call ``ocrmypdf.ocr()`` should also install a SIGBUS signal
|
||||
handler (except on Windows), to raise an exception if access to a memory
|
||||
mapped file fails. OCRmyPDF may use memory mapping.
|
||||
|
||||
.. warning::
|
||||
|
||||
On Windows, the script that calls ``ocrmypdf.ocr()`` must be protected
|
||||
by an "ifmain" guard (``if __name__ == '__main__'``) or you must use
|
||||
``ocrmypdf.ocr(...use_threads=True)``. If you do not take at least one
|
||||
of these steps, Windows process semantics will prevent OCRmyPDF from working
|
||||
correctly.
|
||||
|
||||
Logging
|
||||
-------
|
||||
|
||||
OCRmyPDF will log under loggers named ``ocrmypdf``. In addition, it
|
||||
imports ``pdfminer`` and ``PIL``, both of which post log messages under
|
||||
those logging namespaces.
|
||||
|
||||
You can configure the logging as desired for your application or call
|
||||
:func:`ocrmypdf.configure_logging` to configure logging the same way
|
||||
OCRmyPDF itself does. The command line parameters such as ``--quiet``
|
||||
and ``--verbose`` have no equivalents in the API; you must use the
|
||||
provided configuration function or do configuration in a way that suits
|
||||
your use case.
|
||||
|
||||
Progress monitoring
|
||||
-------------------
|
||||
|
||||
OCRmyPDF uses the ``tqdm`` package to implement its progress bars.
|
||||
:func:`ocrmypdf.configure_logging` will set up logging output to
|
||||
``sys.stderr`` in a way that is compatible with the display of the
|
||||
progress bar. Use ``ocrmypdf.ocr(...progress_bar=False)`` to disable
|
||||
the progress bar.
|
||||
|
||||
Exceptions
|
||||
----------
|
||||
|
||||
OCRmyPDF may throw standard Python exceptions, ``ocrmypdf.exceptions.*``
|
||||
exceptions, some exceptions related to multiprocessing, and
|
||||
``KeyboardInterrupt``. The parent process should provide an exception
|
||||
handler. OCRmyPDF will clean up its temporary files and worker processes
|
||||
automatically when an exception occurs.
|
||||
|
||||
Programs that call OCRmyPDF should consider trapping KeyboardInterrupt
|
||||
so that they allow OCR to terminate with the whole program terminating.
|
||||
|
||||
When OCRmyPDF succeeds conditionally, it returns an integer exit code.
|
||||
|
||||
Reference
|
||||
---------
|
||||
|
||||
.. autofunction:: ocrmypdf.ocr
|
||||
|
||||
.. autoclass:: ocrmypdf.Verbosity
|
||||
:members:
|
||||
:undoc-members:
|
||||
|
||||
.. autofunction:: ocrmypdf.configure_logging
|
||||
@@ -1,43 +0,0 @@
|
||||
=============
|
||||
API Reference
|
||||
=============
|
||||
|
||||
This page summarizes the rest of the public API. Generally speaking this
|
||||
should mainly of interest to plugin developers.
|
||||
|
||||
ocrmypdf.exceptions
|
||||
===================
|
||||
|
||||
.. automodule:: ocrmypdf.exceptions
|
||||
:members:
|
||||
:undoc-members:
|
||||
|
||||
ocrmypdf.helpers
|
||||
================
|
||||
|
||||
.. automodule:: ocrmypdf.helpers
|
||||
:members:
|
||||
|
||||
ocrmypdf.hocrtransform
|
||||
======================
|
||||
|
||||
.. automodule:: ocrmypdf.hocrtransform
|
||||
:members:
|
||||
|
||||
ocrmypdf.pdfa
|
||||
=============
|
||||
|
||||
.. automodule:: ocrmypdf.pdfa
|
||||
:members:
|
||||
|
||||
ocrmypdf.quality
|
||||
================
|
||||
|
||||
.. automodule:: ocrmypdf.quality
|
||||
:members:
|
||||
|
||||
ocrmypdf.subprocess
|
||||
===================
|
||||
|
||||
.. automodule:: ocrmypdf.subprocess
|
||||
:members:
|
||||
-224
@@ -1,224 +0,0 @@
|
||||
================
|
||||
Batch processing
|
||||
================
|
||||
|
||||
This article provides information about running OCRmyPDF on multiple
|
||||
files or configuring it as a service triggered by file system events.
|
||||
|
||||
Batch jobs
|
||||
==========
|
||||
|
||||
Consider using the excellent `GNU
|
||||
Parallel <https://www.gnu.org/software/parallel/>`__ to apply OCRmyPDF
|
||||
to multiple files at once.
|
||||
|
||||
Both ``parallel`` and ``ocrmypdf`` will try to use all available
|
||||
processors. To maximize parallelism without overloading your system with
|
||||
processes, consider using ``parallel -j 2`` to limit parallel to running
|
||||
two jobs at once.
|
||||
|
||||
This command will run all ocrmypdf all files named ``*.pdf`` in the
|
||||
current directory and write them to the previous created ``output/``
|
||||
folder. It will not search subdirectories.
|
||||
|
||||
The ``--tag`` argument tells parallel to print the filename as a prefix
|
||||
whenever a message is printed, so that one can trace any errors to the
|
||||
file that produced them.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
parallel --tag -j 2 ocrmypdf '{}' 'output/{}' ::: *.pdf
|
||||
|
||||
OCRmyPDF automatically repairs PDFs before parsing and gathering
|
||||
information from them.
|
||||
|
||||
Directory trees
|
||||
===============
|
||||
|
||||
This will walk through a directory tree and run OCR on all files in
|
||||
place, printing the output in a way that makes
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
find . -printf '%p' -name '*.pdf' -exec ocrmypdf '{}' '{}' \;
|
||||
|
||||
Alternatively, with a docker container (mounts a volume to the container
|
||||
where the PDFs are stored):
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
find . -printf '%p' -name '*.pdf' -exec docker run --rm -v <host dir>:<container dir> jbarlow83/ocrmypdf '<container dir>/{}' '<container dir>/{}' \;
|
||||
|
||||
This only runs one ``ocrmypdf`` process at a time. This variation uses
|
||||
``find`` to create a directory list and ``parallel`` to parallelize runs
|
||||
of ``ocrmypdf``, again updating files in place.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
find . -name '*.pdf' | parallel --tag -j 2 ocrmypdf '{}' '{}'
|
||||
|
||||
In a Windows batch file, use
|
||||
|
||||
.. code-block:: bat
|
||||
|
||||
for /r %%f in (*.pdf) do ocrmypdf %%f %%f
|
||||
|
||||
Sample script
|
||||
-------------
|
||||
|
||||
This user contributed script also provides an example of batch
|
||||
processing.
|
||||
|
||||
.. literalinclude:: ../misc/batch.py
|
||||
:caption: misc/batch.py
|
||||
|
||||
Synology DiskStations
|
||||
---------------------
|
||||
|
||||
Synology DiskStations (Network Attached Storage devices) can run the
|
||||
Docker image of OCRmyPDF if the Synology `Docker
|
||||
package <https://www.synology.com/en-global/dsm/packages/Docker>`__ is
|
||||
installed. Attached is a script to address particular quirks of using
|
||||
OCRmyPDF on one of these devices.
|
||||
|
||||
This is only possible for x86-based Synology products. Some Synology
|
||||
products use ARM or Power processors and do not support Docker. Further
|
||||
adjustments might be needed to deal with the Synology's relatively
|
||||
limited CPU and RAM.
|
||||
|
||||
.. literalinclude:: ../misc/synology.py
|
||||
:caption: misc/synology.py - Sample script for Synology DiskStations
|
||||
|
||||
Huge batch jobs
|
||||
---------------
|
||||
|
||||
If you have thousands of files to work with, contact the author.
|
||||
Consulting work related to OCRmyPDF helps fund this open source project
|
||||
and all inquiries are appreciated.
|
||||
|
||||
Hot (watched) folders
|
||||
=====================
|
||||
|
||||
Watched folders with watcher.py
|
||||
-------------------------------
|
||||
|
||||
OCRmyPDF has a folder watcher called watcher.py, which is currently included in source
|
||||
distributions but not part of the main program. It may be used natively or may run
|
||||
in a Docker container. Native instances tend to give better performance. watcher.py
|
||||
works on all platforms.
|
||||
|
||||
Users may need to customize the script to meet their requirements.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
pip3 install -r requirements/watcher.txt
|
||||
|
||||
env OCR_INPUT_DIRECTORY=/mnt/input-pdfs \
|
||||
OCR_OUTPUT_DIRECTORY=/mnt/output-pdfs \
|
||||
OCR_OUTPUT_DIRECTORY_YEAR_MONTH=1 \
|
||||
python3 watcher.py
|
||||
|
||||
.. csv-table:: watcher.py environment variables
|
||||
:header: "Environment variable", "Description"
|
||||
:widths: 50, 50
|
||||
|
||||
"OCR_INPUT_DIRECTORY", "Set input directory to monitor (recursive)"
|
||||
"OCR_OUTPUT_DIRECTORY", "Set output directory (should not be under input)"
|
||||
"OCR_ON_SUCCESS_DELETE", "This will delete the input file if the exit code is 0 (OK)"
|
||||
"OCR_OUTPUT_DIRECTORY_YEAR_MONTH", "This will place files in the output in ``{output}/{year}/{month}/{filename}``"
|
||||
"OCR_DESKEW", "Apply deskew to crooked input PDFs"
|
||||
"OCR_JSON_SETTINGS", "A JSON string specifying any other arguments for ``ocrmypdf.ocr``, e.g. ``'OCR_JSON_SETTINGS={"rotate_pages": true}'``.
|
||||
"OCR_POLL_NEW_FILE_SECONDS", "Polling interval"
|
||||
"OCR_LOGLEVEL", "Level of log messages to report"
|
||||
|
||||
One could configure a networked scanner or scanning computer to drop files in the
|
||||
watched folder.
|
||||
|
||||
Watched folders with Docker
|
||||
---------------------------
|
||||
|
||||
The watcher service is included in the OCRmyPDF Docker image. To run it:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
docker run \
|
||||
-v <path to files to convert>:/input \
|
||||
-v <path to store results>:/output \
|
||||
-e OCR_OUTPUT_DIRECTORY_YEAR_MONTH=1 \
|
||||
-e OCR_ON_SUCCESS_DELETE=1 \
|
||||
-e OCR_DESKEW=1 \
|
||||
-e PYTHONUNBUFFERED=1 \
|
||||
-it --entrypoint python3 \
|
||||
jbarlow83/ocrmypdf \
|
||||
watcher.py
|
||||
|
||||
This service will watch for a file that matches ``/input/\*.pdf`` and will
|
||||
convert it to a OCRed PDF in ``/output/``. The parameters to this image are:
|
||||
|
||||
.. csv-table:: watcher.py parameters for Docker
|
||||
:header: "Parameter", "Description"
|
||||
:widths: 50, 50
|
||||
|
||||
"``-v <path to files to convert>:/input``", "Files placed in this location will be OCRed"
|
||||
"``-v <path to store results>:/output``", "This is where OCRed files will be stored"
|
||||
"``-e OCR_OUTPUT_DIRECTORY_YEAR_MONTH=1``", "Define environment variable OCR_OUTPUT_DIRECTORY_YEAR_MONTH=1"
|
||||
"``-e OCR_ON_SUCCESS_DELETE=1``", "Define environment variable"
|
||||
"``-e OCR_DESKEW=1``", "Define environment variable"
|
||||
"``-e PYTHONBUFFERED=1``", "This will force STDOUT to be unbuffered and allow you to see messages in docker logs"
|
||||
|
||||
This service relies on polling to check for changes to the filesystem. It
|
||||
may not be suitable for some environments, such as filesystems shared on a
|
||||
slow network.
|
||||
|
||||
A configuration manager such as Docker Compose could be used to ensure that the
|
||||
service is always available.
|
||||
|
||||
.. literalinclude:: ../misc/docker-compose.example.yml
|
||||
:language: yaml
|
||||
:caption: misc/docker-compose.example.yml
|
||||
|
||||
Caveats
|
||||
-------
|
||||
|
||||
- ``watchmedo`` may not work properly on a networked file system,
|
||||
depending on the capabilities of the file system client and server.
|
||||
- This simple recipe does not filter for the type of file system event,
|
||||
so file copies, deletes and moves, and directory operations, will all
|
||||
be sent to ocrmypdf, producing errors in several cases. Disable your
|
||||
watched folder if you are doing anything other than copying files to
|
||||
it.
|
||||
- If the source and destination directory are the same, watchmedo may
|
||||
create an infinite loop.
|
||||
- On BSD, FreeBSD and older versions of macOS, you may need to increase
|
||||
the number of file descriptors to monitor more files, using
|
||||
``ulimit -n 1024`` to watch a folder of up to 1024 files.
|
||||
|
||||
Alternatives
|
||||
------------
|
||||
|
||||
- On Linux, `systemd user services <https://wiki.archlinux.org/index.php/Systemd/User>`__
|
||||
can be configured to automatically perform OCR on a collection of files.
|
||||
|
||||
- `Watchman <https://facebook.github.io/watchman/>`__ is a more
|
||||
powerful alternative to ``watchmedo``.
|
||||
|
||||
AWS Lambda is not viable
|
||||
------------------------
|
||||
|
||||
AWS Lambda and its equivalents have low limits on execution time and payload
|
||||
size, relative to OCRmyPDF's needs. As of this writing, the request/response
|
||||
payload for AWS Lambda was 6 MB, which means many PDFs will not fit.
|
||||
|
||||
macOS Automator
|
||||
===============
|
||||
|
||||
You can use the Automator app with macOS, to create a Workflow or Quick
|
||||
Action. Use a *Run Shell Script* action in your workflow. In the context
|
||||
of Automator, the ``PATH`` may be set differently your Terminal's
|
||||
``PATH``; you may need to explicitly set the PATH to include
|
||||
``ocrmypdf``. The following example may serve as a starting point:
|
||||
|
||||
.. figure:: images/macos-workflow.png
|
||||
:alt: Example macOS Automator workflow
|
||||
|
||||
You may customize the command sent to ocrmypdf.
|
||||
-373
@@ -1,373 +0,0 @@
|
||||
#!/usr/bin/env python3
|
||||
#
|
||||
# ocrmypdf documentation build configuration file, created by
|
||||
# sphinx-quickstart on Sun Sep 4 14:29:43 2016.
|
||||
#
|
||||
# This file is execfile()d with the current directory set to its
|
||||
# containing dir.
|
||||
#
|
||||
# Note that not all possible configuration values are present in this
|
||||
# autogenerated file.
|
||||
#
|
||||
# All configuration values have a default; values that are commented out
|
||||
# serve to show the default.
|
||||
|
||||
# If extensions (or modules to document with autodoc) are in another directory,
|
||||
# add these directories to sys.path here. If the directory is relative to the
|
||||
# documentation root, use os.path.abspath to make it absolute, like shown here.
|
||||
#
|
||||
# import os
|
||||
# import sys
|
||||
# sys.path.insert(0, os.path.abspath('.'))
|
||||
|
||||
"""isort:skip_file"""
|
||||
|
||||
# -- General configuration ------------------------------------------------
|
||||
|
||||
# If your documentation needs a minimal Sphinx version, state it here.
|
||||
#
|
||||
# needs_sphinx = '1.0'
|
||||
|
||||
# Add any Sphinx extension module names here, as strings. They can be
|
||||
# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
|
||||
# ones.
|
||||
extensions = ['sphinx.ext.napoleon']
|
||||
|
||||
napoleon_use_rtype = False
|
||||
|
||||
# Add any paths that contain templates here, relative to this directory.
|
||||
templates_path = ['_templates']
|
||||
|
||||
# The suffix(es) of source filenames.
|
||||
# You can specify multiple suffix as a list of string:
|
||||
#
|
||||
# source_suffix = ['.rst', '.md']
|
||||
source_suffix = '.rst'
|
||||
|
||||
# The encoding of source files.
|
||||
#
|
||||
# source_encoding = 'utf-8-sig'
|
||||
|
||||
# The master toctree document.
|
||||
master_doc = 'index'
|
||||
|
||||
# General information about the project.
|
||||
project = 'ocrmypdf'
|
||||
copyright = (
|
||||
'2020, James R. Barlow. Licensed under Creative Commons Attribution-ShareAlike 4.0.'
|
||||
)
|
||||
author = 'James R. Barlow'
|
||||
|
||||
# The version info for the project you're documenting, acts as replacement for
|
||||
# |version| and |release|, also used in various other places throughout the
|
||||
# built documents.
|
||||
#
|
||||
# The short X.Y version.
|
||||
|
||||
import os
|
||||
|
||||
on_rtd = os.environ.get('READTHEDOCS') == 'True'
|
||||
|
||||
if on_rtd:
|
||||
# Help ReadTheDocs avoid having to install any binary extension modules
|
||||
import sys
|
||||
from unittest.mock import MagicMock
|
||||
|
||||
class Mock(MagicMock):
|
||||
@classmethod
|
||||
def __getattr__(cls, name):
|
||||
return MagicMock()
|
||||
|
||||
MOCK_MODULES = [
|
||||
'pikepdf',
|
||||
'pikepdf.models',
|
||||
'pikepdf.models.metadata',
|
||||
'ocrmypdf.leptonica',
|
||||
]
|
||||
sys.modules.update((mod_name, Mock()) for mod_name in MOCK_MODULES)
|
||||
|
||||
|
||||
from pkg_resources import get_distribution, DistributionNotFound
|
||||
|
||||
# The full version, including alpha/beta/rc tags.
|
||||
release = get_distribution('ocrmypdf').version
|
||||
version = '.'.join(release.split('.')[:2])
|
||||
|
||||
|
||||
# The language for content autogenerated by Sphinx. Refer to documentation
|
||||
# for a list of supported languages.
|
||||
#
|
||||
# This is also used if you do content translation via gettext catalogs.
|
||||
# Usually you set "language" from the command line for these cases.
|
||||
language = None
|
||||
|
||||
# There are two options for replacing |today|: either, you set today to some
|
||||
# non-false value, then it is used:
|
||||
#
|
||||
# today = ''
|
||||
#
|
||||
# Else, today_fmt is used as the format for a strftime call.
|
||||
#
|
||||
today_fmt = '%Y-%m-%d'
|
||||
|
||||
# List of patterns, relative to source directory, that match files and
|
||||
# directories to ignore when looking for source files.
|
||||
# This patterns also effect to html_static_path and html_extra_path
|
||||
exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
|
||||
|
||||
# The reST default role (used for this markup: `text`) to use for all
|
||||
# documents.
|
||||
#
|
||||
# default_role = None
|
||||
|
||||
# If true, '()' will be appended to :func: etc. cross-reference text.
|
||||
#
|
||||
# add_function_parentheses = True
|
||||
|
||||
# If true, the current module name will be prepended to all description
|
||||
# unit titles (such as .. function::).
|
||||
#
|
||||
# add_module_names = True
|
||||
|
||||
# If true, sectionauthor and moduleauthor directives will be shown in the
|
||||
# output. They are ignored by default.
|
||||
#
|
||||
# show_authors = False
|
||||
|
||||
# The name of the Pygments (syntax highlighting) style to use.
|
||||
pygments_style = 'sphinx'
|
||||
|
||||
# A list of ignored prefixes for module index sorting.
|
||||
# modindex_common_prefix = []
|
||||
|
||||
# If true, keep warnings as "system message" paragraphs in the built documents.
|
||||
# keep_warnings = False
|
||||
|
||||
# If true, `todo` and `todoList` produce output, else they produce nothing.
|
||||
todo_include_todos = False
|
||||
|
||||
|
||||
# -- Options for HTML output ----------------------------------------------
|
||||
|
||||
import sphinx_rtd_theme
|
||||
|
||||
# The theme to use for HTML and HTML Help pages. See the documentation for
|
||||
# a list of builtin themes.
|
||||
#
|
||||
html_theme = 'sphinx_rtd_theme'
|
||||
html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
|
||||
|
||||
# Theme options are theme-specific and customize the look and feel of a theme
|
||||
# further. For a list of options available for each theme, see the
|
||||
# documentation.
|
||||
#
|
||||
html_theme_options = {'display_version': False}
|
||||
|
||||
# Add any paths that contain custom themes here, relative to this directory.
|
||||
# html_theme_path = []
|
||||
|
||||
# The name for this set of Sphinx documents.
|
||||
# "<project> v<release> documentation" by default.
|
||||
#
|
||||
# html_title = 'ocrmypdf v4.2'
|
||||
|
||||
# A shorter title for the navigation bar. Default is the same as html_title.
|
||||
#
|
||||
# html_short_title = None
|
||||
|
||||
# The name of an image file (relative to this directory) to place at the top
|
||||
# of the sidebar.
|
||||
#
|
||||
# html_logo = "images/logo.svg" # looks bad
|
||||
|
||||
# The name of an image file (relative to this directory) to use as a favicon of
|
||||
# the docs. This file should be a Windows icon file (.ico) being 16x16 or 32x32
|
||||
# pixels large.
|
||||
#
|
||||
# html_favicon = None
|
||||
|
||||
# Add any paths that contain custom static files (such as style sheets) here,
|
||||
# relative to this directory. They are copied after the builtin static files,
|
||||
# so a file named "default.css" will overwrite the builtin "default.css".
|
||||
html_static_path = ['_static']
|
||||
|
||||
# Add any extra paths that contain custom files (such as robots.txt or
|
||||
# .htaccess) here, relative to this directory. These files are copied
|
||||
# directly to the root of the documentation.
|
||||
#
|
||||
# html_extra_path = []
|
||||
|
||||
# If not None, a 'Last updated on:' timestamp is inserted at every page
|
||||
# bottom, using the given strftime format.
|
||||
# The empty string is equivalent to '%b %d, %Y'.
|
||||
#
|
||||
# html_last_updated_fmt = None
|
||||
|
||||
# If true, SmartyPants will be used to convert quotes and dashes to
|
||||
# typographically correct entities.
|
||||
#
|
||||
# html_use_smartypants = True
|
||||
|
||||
# Custom sidebar templates, maps document names to template names.
|
||||
#
|
||||
# html_sidebars = {}
|
||||
|
||||
# Additional templates that should be rendered to pages, maps page names to
|
||||
# template names.
|
||||
#
|
||||
# html_additional_pages = {}
|
||||
|
||||
# If false, no module index is generated.
|
||||
#
|
||||
# html_domain_indices = True
|
||||
|
||||
# If false, no index is generated.
|
||||
#
|
||||
# html_use_index = True
|
||||
|
||||
# If true, the index is split into individual pages for each letter.
|
||||
#
|
||||
# html_split_index = False
|
||||
|
||||
# If true, links to the reST sources are added to the pages.
|
||||
#
|
||||
# html_show_sourcelink = True
|
||||
|
||||
# If true, "Created using Sphinx" is shown in the HTML footer. Default is True.
|
||||
#
|
||||
# html_show_sphinx = True
|
||||
|
||||
# If true, "(C) Copyright ..." is shown in the HTML footer. Default is True.
|
||||
#
|
||||
# html_show_copyright = True
|
||||
|
||||
# If true, an OpenSearch description file will be output, and all pages will
|
||||
# contain a <link> tag referring to it. The value of this option must be the
|
||||
# base URL from which the finished HTML is served.
|
||||
#
|
||||
# html_use_opensearch = ''
|
||||
|
||||
# This is the file name suffix for HTML files (e.g. ".xhtml").
|
||||
# html_file_suffix = None
|
||||
|
||||
# Language to be used for generating the HTML full-text search index.
|
||||
# Sphinx supports the following languages:
|
||||
# 'da', 'de', 'en', 'es', 'fi', 'fr', 'h', 'it', 'ja'
|
||||
# 'nl', 'no', 'pt', 'ro', 'r', 'sv', 'tr', 'zh'
|
||||
#
|
||||
# html_search_language = 'en'
|
||||
|
||||
# A dictionary with options for the search language support, empty by default.
|
||||
# 'ja' uses this config value.
|
||||
# 'zh' user can custom change `jieba` dictionary path.
|
||||
#
|
||||
# html_search_options = {'type': 'default'}
|
||||
|
||||
# The name of a javascript file (relative to the configuration directory) that
|
||||
# implements a search results scorer. If empty, the default will be used.
|
||||
#
|
||||
# html_search_scorer = 'scorer.js'
|
||||
|
||||
# Output file base name for HTML help builder.
|
||||
htmlhelp_basename = 'ocrmypdfdoc'
|
||||
|
||||
# -- Options for LaTeX output ---------------------------------------------
|
||||
|
||||
latex_elements = {
|
||||
# The paper size ('letterpaper' or 'a4paper').
|
||||
#
|
||||
# 'papersize': 'letterpaper',
|
||||
# The font size ('10pt', '11pt' or '12pt').
|
||||
#
|
||||
# 'pointsize': '10pt',
|
||||
# Additional stuff for the LaTeX preamble.
|
||||
#
|
||||
# 'preamble': '',
|
||||
# Latex figure (float) alignment
|
||||
#
|
||||
# 'figure_align': 'htbp',
|
||||
}
|
||||
|
||||
# Grouping the document tree into LaTeX files. List of tuples
|
||||
# (source start file, target name, title,
|
||||
# author, documentclass [howto, manual, or own class]).
|
||||
latex_documents = [
|
||||
(master_doc, 'ocrmypdf.tex', 'ocrmypdf Documentation', 'James R. Barlow', 'manual')
|
||||
]
|
||||
|
||||
# The name of an image file (relative to this directory) to place at the top of
|
||||
# the title page.
|
||||
#
|
||||
# latex_logo = None
|
||||
|
||||
# For "manual" documents, if this is true, then toplevel headings are parts,
|
||||
# not chapters.
|
||||
#
|
||||
# latex_use_parts = False
|
||||
|
||||
# If true, show page references after internal links.
|
||||
#
|
||||
# latex_show_pagerefs = False
|
||||
|
||||
# If true, show URL addresses after external links.
|
||||
#
|
||||
# latex_show_urls = False
|
||||
|
||||
# Documents to append as an appendix to all manuals.
|
||||
#
|
||||
# latex_appendices = []
|
||||
|
||||
# It false, will not define \strong, \code, itleref, \crossref ... but only
|
||||
# \sphinxstrong, ..., \sphinxtitleref, ... To help avoid clash with user added
|
||||
# packages.
|
||||
#
|
||||
# latex_keep_old_macro_names = True
|
||||
|
||||
# If false, no module index is generated.
|
||||
#
|
||||
# latex_domain_indices = True
|
||||
|
||||
|
||||
# -- Options for manual page output ---------------------------------------
|
||||
|
||||
# One entry per manual page. List of tuples
|
||||
# (source start file, name, description, authors, manual section).
|
||||
man_pages = [(master_doc, 'ocrmypdf', 'ocrmypdf Documentation', [author], 1)]
|
||||
|
||||
# If true, show URL addresses after external links.
|
||||
#
|
||||
# man_show_urls = False
|
||||
|
||||
|
||||
# -- Options for Texinfo output -------------------------------------------
|
||||
|
||||
# Grouping the document tree into Texinfo files. List of tuples
|
||||
# (source start file, target name, title, author,
|
||||
# dir menu entry, description, category)
|
||||
texinfo_documents = [
|
||||
(
|
||||
master_doc,
|
||||
'ocrmypdf',
|
||||
'ocrmypdf Documentation',
|
||||
author,
|
||||
'ocrmypdf',
|
||||
'One line description of project.',
|
||||
'Miscellaneous',
|
||||
)
|
||||
]
|
||||
|
||||
# Documents to append as an appendix to all manuals.
|
||||
#
|
||||
# texinfo_appendices = []
|
||||
|
||||
# If false, no module index is generated.
|
||||
#
|
||||
# texinfo_domain_indices = True
|
||||
|
||||
# How to display URL addresses: 'footnote', 'no', or 'inline'.
|
||||
#
|
||||
# texinfo_show_urls = 'footnote'
|
||||
|
||||
# If true, do not generate a @detailmenu in the "Top" node's menu.
|
||||
#
|
||||
# texinfo_no_detailmenu = False
|
||||
@@ -1,57 +0,0 @@
|
||||
=======================
|
||||
Contributing guidelines
|
||||
=======================
|
||||
|
||||
Contributions are welcome!
|
||||
|
||||
Big changes
|
||||
===========
|
||||
|
||||
Please open a new issue to discuss or propose a major change. Not only is it fun
|
||||
to discuss big ideas, but we might save each other's time too. Perhaps some of the
|
||||
work you're contemplating is already half-done in a development branch.
|
||||
|
||||
Code style
|
||||
==========
|
||||
|
||||
We use PEP8, ``black`` for code formatting and ``isort`` for import sorting. The
|
||||
settings for these programs are in ``pyproject.toml`` and ``setup.cfg``. Pull
|
||||
requests should follow the style guide. One difference we use from "black" style
|
||||
is that strings shown to the user are always in double quotes (``"``) and strings
|
||||
for internal uses are in single quotes (``'``).
|
||||
|
||||
Tests
|
||||
=====
|
||||
|
||||
New features should come with tests that confirm their correctness.
|
||||
|
||||
New Python dependencies
|
||||
=======================
|
||||
|
||||
If you are proposing a change that will require a new Python dependency, we
|
||||
prefer dependencies that are already packaged by Debian or Red Hat. This makes
|
||||
life much easier for our downstream package maintainers.
|
||||
|
||||
Python dependencies must also be GPLv3 compatible.
|
||||
|
||||
New non-Python dependencies
|
||||
===========================
|
||||
|
||||
OCRmyPDF uses several external programs (Tesseract, Ghostscript and others) for
|
||||
its functionality. In general we prefer to avoid adding new external programs.
|
||||
|
||||
Style guide: Is it OCRmyPDF or ocrmypdf?
|
||||
========================================
|
||||
|
||||
The program/project is OCRmyPDF and the name of the executable or library is ocrmypdf.
|
||||
|
||||
Known ports/packagers
|
||||
=====================
|
||||
|
||||
OCRmyPDF has been ported to many platforms already. If you are interesting in
|
||||
porting to a new platform, check with
|
||||
`Repology <https://repology.org/projects/?search=ocrmypdf>`__ to see the status
|
||||
of that platform.
|
||||
|
||||
Packager maintainers, please ensure that the command line completion scripts in
|
||||
``misc/`` are installed.
|
||||
@@ -1,359 +0,0 @@
|
||||
========
|
||||
Cookbook
|
||||
========
|
||||
|
||||
Basic examples
|
||||
==============
|
||||
|
||||
Help!
|
||||
-----
|
||||
|
||||
ocrmypdf has built-in help.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
ocrmypdf --help
|
||||
|
||||
Add an OCR layer and convert to PDF/A
|
||||
-------------------------------------
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
ocrmypdf input.pdf output.pdf
|
||||
|
||||
Add an OCR layer and output a standard PDF
|
||||
------------------------------------------
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
ocrmypdf --output-type pdf input.pdf output.pdf
|
||||
|
||||
Create a PDF/A with all color and grayscale images converted to JPEG
|
||||
--------------------------------------------------------------------
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
ocrmypdf --output-type pdfa --pdfa-image-compression jpeg input.pdf output.pdf
|
||||
|
||||
Modify a file in place
|
||||
----------------------
|
||||
|
||||
The file will only be overwritten if OCRmyPDF is successful.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
ocrmypdf myfile.pdf myfile.pdf
|
||||
|
||||
Correct page rotation
|
||||
---------------------
|
||||
|
||||
OCR will attempt to automatic correct the rotation of each page. This
|
||||
can help fix a scanning job that contains a mix of landscape and
|
||||
portrait pages.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
ocrmypdf --rotate-pages myfile.pdf myfile.pdf
|
||||
|
||||
You can increase (decrease) the parameter ``--rotate-pages-threshold``
|
||||
to make page rotation more (less) aggressive. The threshold number is the ratio
|
||||
of how confidence the OCR engine is that the document image should be changed,
|
||||
compared to kept the same. A value of ``15.0`` is the default, and is fairly
|
||||
conservative. A value of ``2.0`` will produce more rotations, and more false
|
||||
positives.
|
||||
|
||||
If the page is "just a little off horizontal", like a crooked picture,
|
||||
then you want ``--deskew``. ``--rotate-pages`` is for when the cardinal
|
||||
angle is wrong.
|
||||
|
||||
OCR languages other than English
|
||||
--------------------------------
|
||||
|
||||
OCRmyPDF assumes the document is in English unless told otherwise. OCR
|
||||
quality may be poor if the wrong language is used.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
ocrmypdf -l fra LeParisien.pdf LeParisien.pdf
|
||||
ocrmypdf -l eng+fra Bilingual-English-French.pdf Bilingual-English-French.pdf
|
||||
|
||||
Language packs must be installed for all languages specified. See
|
||||
:ref:`Installing additional language packs <lang-packs>`.
|
||||
|
||||
Unfortunately, the Tesseract OCR engine has no ability to detect the
|
||||
language when it is unknown.
|
||||
|
||||
Produce PDF and text file containing OCR text
|
||||
---------------------------------------------
|
||||
|
||||
This produces a file named "output.pdf" and a companion text file named
|
||||
"output.txt".
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
ocrmypdf --sidecar output.txt input.pdf output.pdf
|
||||
|
||||
.. note::
|
||||
|
||||
The sidecar file contains the **OCR text** found by OCRmyPDF. If the document
|
||||
contains pages that already have text, that text will not appear in the
|
||||
sidecar. If the option ``--pages`` is used, only those pages on which OCR
|
||||
was performed will be included in the sidecar. If certain pages were skipped
|
||||
because of options like ``--skip-big`` or ``--tesseract-timeout``, those pages
|
||||
will not be in the sidecar.
|
||||
|
||||
To extract all text from a PDF, whether generated from OCR or otherwise,
|
||||
use a program like Poppler's ``pdftotext`` or ``pdfgrep``.
|
||||
|
||||
OCR images, not PDFs
|
||||
--------------------
|
||||
|
||||
Option: use Tesseract
|
||||
~~~~~~~~~~~~~~~~~~~~~
|
||||
|
||||
If you are starting with images, you can just use Tesseract directly to
|
||||
convert images to PDFs:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
tesseract my-image.jpg output-prefix pdf
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
# When there are multiple images
|
||||
tesseract text-file-containing-list-of-image-filenames.txt output-prefix pdf
|
||||
|
||||
Tesseract's PDF output is quite good – OCRmyPDF uses it internally, in
|
||||
some cases. However, OCRmyPDF has many features not available in
|
||||
Tesseract like image processing, metadata control, and PDF/A generation.
|
||||
|
||||
Option: use img2pdf
|
||||
~~~~~~~~~~~~~~~~~~~
|
||||
|
||||
You can also use a program like
|
||||
`img2pdf <https://gitlab.mister-muffin.de/josch/img2pdf>`__ to convert
|
||||
your images to PDFs, and then pipe the results to run ocrmypdf. The
|
||||
``-`` tells ocrmypdf to read standard input.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
img2pdf my-images*.jpg | ocrmypdf - myfile.pdf
|
||||
|
||||
``img2pdf`` is recommended because it does an excellent job at
|
||||
generating PDFs without transcoding images.
|
||||
|
||||
Option: use OCRmyPDF (single images only)
|
||||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
|
||||
For convenience, OCRmyPDF can also convert single images to PDFs on its
|
||||
own. If the resolution (dots per inch, DPI) of an image is not set or is
|
||||
incorrect, it can be overridden with ``--image-dpi``. (As 1 inch is 2.54
|
||||
cm, 1 dpi = 0.39 dpcm).
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
ocrmypdf --image-dpi 300 image.png myfile.pdf
|
||||
|
||||
If you have multiple images, you must use ``img2pdf`` to convert the
|
||||
images to PDF.
|
||||
|
||||
Not recommended
|
||||
~~~~~~~~~~~~~~~
|
||||
|
||||
We caution against using ImageMagick or Ghostscript to convert images to
|
||||
PDF, since they may transcode images or produce downsampled images,
|
||||
sometimes without warning.
|
||||
|
||||
Image processing
|
||||
================
|
||||
|
||||
OCRmyPDF perform some image processing on each page of a PDF, if
|
||||
desired. The same processing is applied to each page. It is suggested
|
||||
that the user review files after image processing as these commands
|
||||
might remove desirable content, especially from poor quality scans.
|
||||
|
||||
- ``--rotate-pages`` attempts to determine the correct orientation for
|
||||
each page and rotates the page if necessary.
|
||||
- ``--remove-background`` attempts to detect and remove a noisy
|
||||
background from grayscale or color images. Monochrome images are
|
||||
ignored. This should not be used on documents that contain color
|
||||
photos as it may remove them.
|
||||
- ``--deskew`` will correct pages were scanned at a skewed angle by
|
||||
rotating them back into place. Skew determination and correction is
|
||||
performed using `Postl's variance of line
|
||||
sums <http://www.leptonica.org/skew-measurement.html>`__ algorithm as
|
||||
implemented in `Leptonica <http://www.leptonica.org/index.html>`__.
|
||||
- ``--clean`` uses
|
||||
`unpaper <https://www.flameeyes.eu/projects/unpaper>`__ to clean up
|
||||
pages before OCR, but does not alter the final output. This makes it
|
||||
less likely that OCR will try to find text in background noise.
|
||||
- ``--clean-final`` uses unpaper to clean up pages before OCR and
|
||||
inserts the page into the final output. You will want to review each
|
||||
page to ensure that unpaper did not remove something important.
|
||||
|
||||
.. note::
|
||||
|
||||
In many cases image processing will rasterize PDF pages as images,
|
||||
potentially losing quality.
|
||||
|
||||
.. warning::
|
||||
|
||||
``--clean-final`` and ``-remove-background`` may leave undesirable
|
||||
visual artifacts in some images where their algorithms have
|
||||
shortcomings. Files should be visually reviewed after using these
|
||||
options.
|
||||
|
||||
Example: OCR and correct document skew (crooked scan)
|
||||
-----------------------------------------------------
|
||||
|
||||
Deskew:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
ocrmypdf --deskew input.pdf output.pdf
|
||||
|
||||
Image processing commands can be combined. The order in which options
|
||||
are given does not matter. OCRmyPDF always applies the steps of the
|
||||
image processing pipeline in the same order (rotate, remove background,
|
||||
deskew, clean).
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
ocrmypdf --deskew --clean --rotate-pages input.pdf output.pdf
|
||||
|
||||
Don't actually OCR my PDF
|
||||
=========================
|
||||
|
||||
If you set ``--tesseract-timeout 0`` OCRmyPDF will apply its image
|
||||
processing without performing OCR, if all you want to is to apply image
|
||||
processing or PDF/A conversion.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
ocrmypdf --tesseract-timeout=0 --remove-background input.pdf output.pdf
|
||||
|
||||
Optimize images without performing OCR
|
||||
--------------------------------------
|
||||
|
||||
You can also optimize all images without performing any OCR:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
ocrmypdf --tesseract-timeout=0 --optimize 3 --skip-text input.pdf output.pdf
|
||||
|
||||
Perform OCR only certain pages
|
||||
------------------------------
|
||||
|
||||
You can ask OCRmyPDF to only apply OCR to certain pages.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
ocrmypdf --pages 2,3,13-17 input.pdf output.pdf
|
||||
|
||||
Hyphens denote a range of pages and commas separate page numbers. If you prefer
|
||||
to use spaces, quote all of the page numbers: ``--pages '2, 3, 5, 7'``.
|
||||
|
||||
OCRmyPDF will warn if your list of page numbers contains duplicates or
|
||||
overlap pages. OCRmyPDF does not currently account for document page numbers,
|
||||
such as an introduction section of a book that uses Roman numerals. It simply
|
||||
counts the number of virtual pieces of paper since the start.
|
||||
|
||||
Regardless of the argument to ``--pages``, OCRmyPDF will optimize all pages in
|
||||
the file and convert it to PDF/A, unless you disable those options. In this
|
||||
example, we want to OCR only the title and otherwise change the PDF as little
|
||||
as possible:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
ocrmypdf --pages 1 --output-type pdf --optimize 0 input.pdf output.pdf
|
||||
|
||||
Redo existing OCR
|
||||
=================
|
||||
|
||||
To redo OCR on a file OCRed with other OCR software or a previous
|
||||
version of OCRmyPDF and/or Tesseract, you may use the ``--redo-ocr``
|
||||
argument. (Normally, OCRmyPDF will exit with an error if asked to modify
|
||||
a file with OCR.)
|
||||
|
||||
This may be helpful for users who want to take advantage of accuracy
|
||||
improvements in Tesseract 4.0 for files they previously OCRed with an
|
||||
earlier version of Tesseract and OCRmyPDF.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
ocrmypdf --redo-ocr input.pdf output.pdf
|
||||
|
||||
This method will replace OCR without rasterizing, reducing quality or
|
||||
removing vector content. If a file contains a mix of pure digital text
|
||||
and OCR, digital text will be ignored and OCR will be replaced. As such
|
||||
this mode is incompatible with image processing options, since they
|
||||
alter the appearance of the file.
|
||||
|
||||
In some cases, existing OCR cannot be detected or replaced. Files
|
||||
produced by OCRmyPDF v2.2 or earlier, for example, are internally
|
||||
represented as having visible text with an opaque image drawn on top.
|
||||
This situation cannot be detected.
|
||||
|
||||
If ``--redo-ocr`` does not work, you can use ``--force-ocr``, which will
|
||||
force rasterization of all pages, potentially reducing quality or losing
|
||||
vector content.
|
||||
|
||||
Improving OCR quality
|
||||
=====================
|
||||
|
||||
The `Image processing <#image-processing>`__ features can improve OCR
|
||||
quality.
|
||||
|
||||
Rotating pages and deskewing helps to ensure that the page orientation
|
||||
is correct before OCR begins. Removing the background and/or cleaning
|
||||
the page can also improve results. The ``--oversample DPI`` argument can
|
||||
be specified to resample images to higher resolution before attempting
|
||||
OCR; this can improve results as well.
|
||||
|
||||
OCR quality will suffer if the resolution of input images is not correct
|
||||
(since the range of pixel sizes that will be checked for possible fonts
|
||||
will also be incorrect).
|
||||
|
||||
PDF optimization
|
||||
================
|
||||
|
||||
By default OCRmyPDF will attempt to perform lossless optimizations on
|
||||
the images inside PDFs after OCR is complete. Optimization is performed
|
||||
even if no OCR text is found.
|
||||
|
||||
The ``--optimize N`` (short form ``-O``) argument controls optimization,
|
||||
where ``N`` ranges from 0 to 3 inclusive, analogous to the optimization
|
||||
levels in the GCC compiler.
|
||||
|
||||
.. list-table::
|
||||
:widths: auto
|
||||
:header-rows: 1
|
||||
|
||||
* - Level
|
||||
- Comments
|
||||
* - ``--optimize 0``
|
||||
- Disables optimization.
|
||||
* - ``--optimize 1``
|
||||
- Enables lossless optimizations, such as transcoding images to more
|
||||
efficient formats. Also compress other uncompressed objects in the
|
||||
PDF and enables the more efficient "object streams" within the PDF.
|
||||
* - ``--optimize 2``
|
||||
- All of the above, and enables lossy optimizations and color quantization.
|
||||
* - ``--optimize 3``
|
||||
- All of the above, and enables more aggressive optimizations and targets lower image quality.
|
||||
|
||||
Optimization is improved when a JBIG2 encoder is available and when
|
||||
``pngquant`` is installed. If either of these components are missing,
|
||||
then some types of images cannot be optimized.
|
||||
|
||||
The types of optimization available may expand over time. By default,
|
||||
OCRmyPDF compresses data streams inside PDFs, and will change
|
||||
inefficient compression modes to more modern versions. A program like
|
||||
``qpdf`` can be used to change encodings, e.g. to inspect the internals
|
||||
fo a PDF.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
ocrmypdf --optimize 3 in.pdf out.pdf # Make it small
|
||||
|
||||
Some users may consider enabling lossy JBIG2. See: :ref:`jbig2-lossy`.
|
||||
-170
@@ -1,170 +0,0 @@
|
||||
=====================
|
||||
OCRmyPDF Docker image
|
||||
=====================
|
||||
|
||||
OCRmyPDF is also available in a Docker image that packages recent
|
||||
versions of all dependencies.
|
||||
|
||||
For users who already have Docker installed this may be an easy and
|
||||
convenient option. However, it is less performant than a system
|
||||
installation and may require Docker engine configuration.
|
||||
|
||||
OCRmyPDF needs a generous amount of RAM, CPU cores, temporary storage
|
||||
space, whether running in a Docker container or on its own. It may be
|
||||
necessary to ensure the container is provisioned with additional
|
||||
resources.
|
||||
|
||||
.. _docker-install:
|
||||
|
||||
Installing the Docker image
|
||||
===========================
|
||||
|
||||
If you have `Docker <https://docs.docker.com/>`__ installed on your
|
||||
system, you can install a Docker image of the latest release.
|
||||
|
||||
If you can run this command successfully, your system is ready to download and
|
||||
execute the image:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
docker run hello-world
|
||||
|
||||
The recommended OCRmyPDF Docker image is currently named ``ocrmypdf``:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
docker pull jbarlow83/ocrmypdf
|
||||
|
||||
|
||||
OCRmyPDF will use all available CPU cores. By default, the VirtualBox
|
||||
machine instance on Windows and macOS has only a single CPU core
|
||||
enabled. Use the VirtualBox Manager to determine the name of your Docker
|
||||
engine host, and then follow these optional steps to enable multiple
|
||||
CPUs:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
# Optional step for Mac OS X users
|
||||
docker-machine stop "yourVM"
|
||||
VBoxManage modifyvm "yourVM" --cpus 2 # or whatever number of core is desired
|
||||
docker-machine start "yourVM"
|
||||
eval $(docker-machine env "yourVM")
|
||||
|
||||
See the Docker documentation for
|
||||
`adjusting memory and CPU on other platforms <https://docs.docker.com/config/containers/resource_constraints/>`__.
|
||||
|
||||
Using the Docker image on the command line
|
||||
==========================================
|
||||
|
||||
**Unlike typical Docker containers**, in this section the OCRmyPDF Docker
|
||||
container is emphemeral – it runs for one OCR job and terminates, just like a
|
||||
command line program. We are using Docker to deliver an application (as opposed
|
||||
to the more conventional case, where a Docker container runs as a server).
|
||||
|
||||
To start a Docker container (instance of the image):
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
docker tag jbarlow83/ocrmypdf ocrmypdf
|
||||
docker run --rm -i ocrmypdf (... all other arguments here...) - -
|
||||
|
||||
For convenience, create a shell alias to hide the Docker command. It is
|
||||
easier to send the input file as stdin and read the output from
|
||||
stdout – **this avoids the messy permission issues with Docker entirely**.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
alias docker_ocrmypdf='docker run --rm -i ocrmypdf'
|
||||
docker_ocrmypdf --version # runs docker version
|
||||
docker_ocrmypdf - - <input.pdf >output.pdf
|
||||
|
||||
Or in the wonderful `fish shell <https://fishshell.com/>`__:
|
||||
|
||||
.. code-block:: fish
|
||||
|
||||
alias docker_ocrmypdf 'docker run --rm ocrmypdf'
|
||||
funcsave docker_ocrmypdf
|
||||
|
||||
Alternately, you could mount the local current working directory as a
|
||||
Docker volume:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
alias docker_ocrmypdf='docker run --rm -i --user "$(id -u):$(id -g)" --workdir /data -v "$PWD:/data" ocrmypdf'
|
||||
docker_ocrmypdf /data/input.pdf /data/output.pdf
|
||||
|
||||
.. _docker-lang-packs:
|
||||
|
||||
Adding languages to the Docker image
|
||||
====================================
|
||||
|
||||
By default the Docker image includes English, German, Simplified Chinese,
|
||||
French, Portuguese and Spanish, the most popular languages for OCRmyPDF
|
||||
users based on feedback. You may add other languages by creating a new
|
||||
Dockerfile based on the public one:
|
||||
|
||||
.. code-block:: dockerfile
|
||||
|
||||
FROM jbarlow83/ocrmypdf
|
||||
|
||||
# Add French
|
||||
RUN apt install tesseract-ocr-fra
|
||||
|
||||
You can also copy training data to ``/usr/share/tesseract-ocr/<tesseract version>/tessdata``.
|
||||
|
||||
Executing the test suite
|
||||
========================
|
||||
|
||||
The OCRmyPDF test suite is installed with image. To run it:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
docker run --entrypoint python3 jbarlow83/ocrmypdf -m pytest
|
||||
|
||||
Accessing the shell
|
||||
===================
|
||||
|
||||
To use the bash shell in the Docker image:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
docker run -it --entrypoint bash jbarlow83/ocrmypdf
|
||||
|
||||
Using the OCRmyPDF web service wrapper
|
||||
======================================
|
||||
|
||||
The OCRmyPDF Docker image includes an example, barebones HTTP web
|
||||
service. The webservice may be launched as follows:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
docker run --entrypoint python3 -p 5000:5000 jbarlow83/ocrmypdf webservice.py
|
||||
|
||||
This will configure the machine to listen on port 5000. On Linux machines
|
||||
this is port 5000 of localhost. On macOS or Windows machines running
|
||||
Docker, this is port 5000 of the virtual machine that runs your Docker
|
||||
images. You can find its IP address using the command ``docker-machine ip``.
|
||||
|
||||
Unlike command line usage this program will open a socket and wait for
|
||||
connections.
|
||||
|
||||
.. warning::
|
||||
|
||||
The OCRmyPDF web service wrapper is intended for demonstration or
|
||||
development. It provides no security, no authentication, no
|
||||
protection against denial of service attacks, and no load balancing.
|
||||
The default Flask WSGI server is used, which is intended for
|
||||
development only. The server is single-threaded and so can respond to
|
||||
only one client at a time. While running OCR, it cannot respond to
|
||||
any other clients.
|
||||
|
||||
Clients must keep their open connection while waiting for OCR to
|
||||
complete. This may entail setting a long timeout; this interface is more
|
||||
useful for internal HTTP API calls.
|
||||
|
||||
Unlike the rest of OCRmyPDF, this web service is licensed under the
|
||||
Affero GPLv3 (AGPLv3) since Ghostscript, a dependency of OCRmyPDF, is
|
||||
also licensed in this way.
|
||||
|
||||
In addition to the above, please read our
|
||||
:ref:`general remarks on using OCRmyPDF as a service <ocr-service>`.
|
||||
@@ -1,53 +0,0 @@
|
||||
=====================
|
||||
Common error messages
|
||||
=====================
|
||||
|
||||
Page already has text
|
||||
=====================
|
||||
|
||||
.. code-block::
|
||||
|
||||
ERROR - 1: page already has text! – aborting (use --force-ocr to force OCR)
|
||||
|
||||
You ran ocrmypdf on a file that already contains printable text or a
|
||||
hidden OCR text layer (it can't quite tell the difference). You probably
|
||||
don't want to do this, because the file is already searchable.
|
||||
|
||||
As the error message suggests, your options are:
|
||||
|
||||
- ``ocrmypdf --force-ocr`` to :ref:`rasterize <raster-vector>` all
|
||||
vector content and run OCR on the images. This is useful if a
|
||||
previous OCR program failed, or if the document contains a text
|
||||
watermark.
|
||||
- ``ocrmypdf --skip-text`` to skip OCR and other processing on any
|
||||
pages that contain text. Text pages will be copied into the output
|
||||
PDF without modification.
|
||||
- ``ocrmypdf --redo-ocr`` to scan the file for any existing OCR
|
||||
(non-printing text), remove it, and do OCR again. This is one way
|
||||
to take advantage of improvements in OCR accuracy. Printable vector
|
||||
text is excluded from OCR, so this can be used on files that contain
|
||||
a mix of digital and scanned files.
|
||||
|
||||
|
||||
Input file 'filename' is not a valid PDF
|
||||
========================================
|
||||
|
||||
OCRmyPDF checks files with pikepdf, a library that in turn uses libqpdf to fixes
|
||||
errors in PDFs, before it tries to work on them. In most cases this happens
|
||||
because the PDF is corrupt and truncated (incomplete file copying) and not much
|
||||
can be done.
|
||||
|
||||
You can try rewriting the file with Ghostscript:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
gs -o output.pdf -dSAFER -sDEVICE=pdfwrite input.pdf
|
||||
|
||||
``pdftk`` can also rewrite PDFs:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
pdftk input.pdf cat output output.pdf
|
||||
|
||||
Sometimes Acrobat can repair PDFs with its `Preflight
|
||||
tool <https://helpx.adobe.com/acrobat/using/correcting-problem-areas-preflight-tool.html>`__.
|
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|
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@@ -1,47 +0,0 @@
|
||||
OCRmyPDF documentation
|
||||
======================
|
||||
|
||||
OCRmyPDF adds an optical charcter recognition (OCR) text layer to scanned PDF
|
||||
files, allowing them to be searched.
|
||||
|
||||
PDF is the best format for storing and exchanging scanned documents.
|
||||
Unfortunately, PDFs can be difficult to modify. OCRmyPDF makes it easy to apply
|
||||
image processing and OCR to existing PDFs.
|
||||
|
||||
.. toctree::
|
||||
:maxdepth: 1
|
||||
|
||||
introduction
|
||||
release_notes
|
||||
installation
|
||||
optimizer
|
||||
languages
|
||||
jbig2
|
||||
|
||||
.. toctree::
|
||||
:caption: Usage
|
||||
:maxdepth: 2
|
||||
|
||||
cookbook
|
||||
docker
|
||||
advanced
|
||||
batch
|
||||
performance
|
||||
pdfsecurity
|
||||
errors
|
||||
|
||||
.. toctree::
|
||||
:caption: Developers
|
||||
:maxdepth: 2
|
||||
|
||||
api
|
||||
plugins
|
||||
apiref
|
||||
contributing
|
||||
|
||||
Indices and tables
|
||||
==================
|
||||
|
||||
* :ref:`genindex`
|
||||
* :ref:`modindex`
|
||||
* :ref:`search`
|
||||
@@ -1,802 +0,0 @@
|
||||
===================
|
||||
Installing OCRmyPDF
|
||||
===================
|
||||
|
||||
.. |latest| image:: https://img.shields.io/pypi/v/ocrmypdf.svg
|
||||
:alt: OCRmyPDF latest released version on PyPI
|
||||
|
||||
|latest|
|
||||
|
||||
The easiest way to install OCRmyPDF is to follow the steps for your operating
|
||||
system/platform. This version may be out of date, however.
|
||||
|
||||
These platforms have one-liner installs:
|
||||
|
||||
+-----------------------------+-------------------------------+
|
||||
| Debian, Ubuntu | ``apt install ocrmypdf`` |
|
||||
+-----------------------------+-------------------------------+
|
||||
| Windows Subsystem for Linux | ``apt install ocrmypdf`` |
|
||||
+-----------------------------+-------------------------------+
|
||||
| Fedora | ``dnf install ocrmypdf`` |
|
||||
+-----------------------------+-------------------------------+
|
||||
| macOS | ``brew install ocrmypdf`` |
|
||||
+-----------------------------+-------------------------------+
|
||||
| LinuxBrew | ``brew install ocrmypdf`` |
|
||||
+-----------------------------+-------------------------------+
|
||||
| FreeBSD | ``pkg install py37-ocrmypdf`` |
|
||||
+-----------------------------+-------------------------------+
|
||||
|
||||
More detailed procedures are outlined below. If you want to do a manual
|
||||
install, or install a more recent version than your platform provides, read on.
|
||||
|
||||
.. contents:: Platform-specific steps
|
||||
:depth: 2
|
||||
:local:
|
||||
|
||||
Installing on Linux
|
||||
===================
|
||||
|
||||
Debian and Ubuntu 18.04 or newer
|
||||
--------------------------------
|
||||
|
||||
.. |deb-stable| image:: https://repology.org/badge/version-for-repo/debian_stable/ocrmypdf.svg
|
||||
:alt: Debian 9 stable ("stretch")
|
||||
|
||||
.. |deb-testing| image:: https://repology.org/badge/version-for-repo/debian_testing/ocrmypdf.svg
|
||||
:alt: Debian 10 testing ("buster")
|
||||
|
||||
.. |deb-unstable| image:: https://repology.org/badge/version-for-repo/debian_unstable/ocrmypdf.svg
|
||||
:alt: Debian unstable
|
||||
|
||||
.. |ubu-1804| image:: https://repology.org/badge/version-for-repo/ubuntu_18_04/ocrmypdf.svg
|
||||
:alt: Ubuntu 18.04 LTS
|
||||
|
||||
.. |ubu-2004| image:: https://repology.org/badge/version-for-repo/ubuntu_20_04/ocrmypdf.svg
|
||||
:alt: Ubuntu 20.04 LTS
|
||||
|
||||
+-----------------------------------------------+
|
||||
| **OCRmyPDF versions in Debian & Ubuntu** |
|
||||
+-----------------------------------------------+
|
||||
| |latest| |
|
||||
+-----------------------------------------------+
|
||||
| |deb-stable| |deb-testing| |deb-unstable| |
|
||||
+-----------------------------------------------+
|
||||
| |ubu-1804| |ubu-2004| |
|
||||
+-----------------------------------------------+
|
||||
|
||||
Users of Debian 9 ("stretch") or later, or Ubuntu 18.04 or later, including users
|
||||
of Windows Subsystem for Linux, may simply
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
apt-get install ocrmypdf
|
||||
|
||||
As indicated in the table above, Debian and Ubuntu releases may lag
|
||||
behind the latest version. If the version available for your platform is
|
||||
out of date, you could opt to install the latest version from source.
|
||||
See `Installing HEAD revision from
|
||||
sources <#installing-head-revision-from-sources>`__. Ubuntu 16.10 to 17.10
|
||||
inclusive also had ocrmypdf, but these versions are end of life.
|
||||
|
||||
For full details on version availability for your platform, check the
|
||||
`Debian Package Tracker <https://tracker.debian.org/pkg/ocrmypdf>`__ or
|
||||
`Ubuntu launchpad.net <https://launchpad.net/ocrmypdf>`__.
|
||||
|
||||
.. note::
|
||||
|
||||
OCRmyPDF for Debian and Ubuntu currently omit the JBIG2 encoder.
|
||||
OCRmyPDF works fine without it but will produce larger output files.
|
||||
If you build jbig2enc from source, ocrmypdf 7.0.0 and later will
|
||||
automatically detect it (specifically the ``jbig2`` binary) on the
|
||||
``PATH``. To add JBIG2 encoding, see :ref:`jbig2`.
|
||||
|
||||
Fedora 29 or newer
|
||||
------------------
|
||||
|
||||
.. |fedora-31| image:: https://repology.org/badge/version-for-repo/fedora_31/ocrmypdf.svg
|
||||
:alt: Fedora 31
|
||||
|
||||
.. |fedora-32| image:: https://repology.org/badge/version-for-repo/fedora_32/ocrmypdf.svg
|
||||
:alt: Fedora 32
|
||||
|
||||
.. |fedora-rawhide| image:: https://repology.org/badge/version-for-repo/fedora_rawhide/ocrmypdf.svg
|
||||
:alt: Fedore Rawhide
|
||||
|
||||
+-----------------------------------------------+
|
||||
| **OCRmyPDF version** |
|
||||
+-----------------------------------------------+
|
||||
| |latest| |
|
||||
+-----------------------------------------------+
|
||||
| |fedora-31| |fedora-32| |fedora-rawhide| |
|
||||
+-----------------------------------------------+
|
||||
|
||||
Users of Fedora 29 or later may simply
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
dnf install ocrmypdf
|
||||
|
||||
For full details on version availability, check the `Fedora Package
|
||||
Tracker <https://apps.fedoraproject.org/packages/ocrmypdf>`__.
|
||||
|
||||
If the version available for your platform is out of date, you could opt
|
||||
to install the latest version from source. See `Installing HEAD revision
|
||||
from sources <#installing-head-revision-from-sources>`__.
|
||||
|
||||
.. note::
|
||||
|
||||
OCRmyPDF for Fedora currently omits the JBIG2 encoder due to patent
|
||||
issues. OCRmyPDF works fine without it but will produce larger output
|
||||
files. If you build jbig2enc from source, ocrmypdf 7.0.0 and later
|
||||
will automatically detect it on the ``PATH``. To add JBIG2 encoding,
|
||||
see `Installing the JBIG2 encoder <jbig2>`__.
|
||||
|
||||
.. _ubuntu-lts-latest:
|
||||
|
||||
Installing the latest version on Ubuntu 20.04 LTS
|
||||
-------------------------------------------------
|
||||
|
||||
Ubuntu 20.04 includes ocrmypdf 9.6.0 - you can install that with ``apt``. To
|
||||
install a more recent version, uninstall the system-provided version of
|
||||
ocrmypdf, and install the following dependencies:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
sudo apt-get -y remove ocrmypdf # remove system ocrmypdf, if installed
|
||||
sudo apt-get -y update
|
||||
sudo apt-get -y install \
|
||||
ghostscript \
|
||||
icc-profiles-free \
|
||||
liblept5 \
|
||||
libxml2 \
|
||||
pngquant \
|
||||
python3-pip \
|
||||
tesseract-ocr \
|
||||
zlib1g
|
||||
|
||||
To install ocrmypdf for the system:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
sudo pip3 install ocrmypdf
|
||||
|
||||
To install for the current user only:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
export PATH=$HOME/.local/bin:$PATH
|
||||
pip3 install --user ocrmypdf
|
||||
|
||||
Ubuntu 18.04 LTS
|
||||
----------------
|
||||
|
||||
Ubuntu 18.04 includes ocrmypdf 6.1.2 - you can install that with ``apt``, but
|
||||
it is quite old now. To install a more recent version, uninstall the old version
|
||||
of ocrmypdf, and install the following dependencies:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
sudo apt-get -y remove ocrmypdf
|
||||
sudo apt-get -y update
|
||||
sudo apt-get -y install \
|
||||
ghostscript \
|
||||
icc-profiles-free \
|
||||
liblept5 \
|
||||
libxml2 \
|
||||
pngquant \
|
||||
python3-cffi \
|
||||
python3-distutils \
|
||||
python3-pkg-resources \
|
||||
python3-reportlab \
|
||||
qpdf \
|
||||
tesseract-ocr \
|
||||
zlib1g
|
||||
|
||||
We will need a newer version of ``pip`` then was available for Ubuntu 18.04:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
wget https://bootstrap.pypa.io/get-pip.py && python3 get-pip.py
|
||||
|
||||
Then install the most recent ocrmypdf for the local user and set the
|
||||
user's ``PATH`` to check for the user's Python packages.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
export PATH=$HOME/.local/bin:$PATH
|
||||
python3 -m pip install --user ocrmypdf
|
||||
|
||||
To add JBIG2 encoding, see :ref:`jbig2`.
|
||||
|
||||
Ubuntu 16.04 LTS
|
||||
----------------
|
||||
|
||||
No package is available for Ubuntu 16.04. OCRmyPDF 8.0 and newer require
|
||||
Python 3.6. Ubuntu 16.04 ships Python 3.5, but you can install Python
|
||||
3.6 on it. Or, you can skip Python 3.6 and install OCRmyPDF 7.x or older
|
||||
- for that procedure, please see the installation documentation for the
|
||||
version of OCRmyPDF you plan to use.
|
||||
|
||||
**Install system packages for OCRmyPDF**
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
sudo apt-get update
|
||||
sudo apt-get install -y software-properties-common python-software-properties
|
||||
sudo add-apt-repository -y \
|
||||
ppa:jonathonf/python-3.6 \
|
||||
ppa:alex-p/tesseract-ocr
|
||||
sudo apt-get update
|
||||
sudo apt-get install -y \
|
||||
ghostscript \
|
||||
libexempi3 \
|
||||
libffi6 \
|
||||
pngquant \
|
||||
python3.6 \
|
||||
qpdf \
|
||||
tesseract-ocr \
|
||||
unpaper
|
||||
|
||||
This will install a Python 3.6 binary at ``/usr/bin/python3.6``
|
||||
alongside the system's Python 3.5. Do not remove the system Python. This
|
||||
will also install Tesseract 4.0 from a PPA, since the version available
|
||||
in Ubuntu 16.04 is too old for OCRmyPDF.
|
||||
|
||||
Now install pip for Python 3.6. This will install the Python 3.6 version
|
||||
of ``pip`` at ``/usr/local/bin/pip``.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
curl https://bootstrap.pypa.io/get-pip.py | sudo python3.6
|
||||
|
||||
**Install OCRmyPDF**
|
||||
|
||||
OCRmyPDF requires the locale to be set for UTF-8. **On some minimal
|
||||
Ubuntu installations**, such as the Ubuntu 16.04 Docker images it may be
|
||||
necessary to set the locale.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
# Optional: Only need to set these if they are not already set
|
||||
export LC_ALL=C.UTF-8
|
||||
export LANG=C.UTF-8
|
||||
|
||||
Now install OCRmyPDF for the current user, and ensure that the ``PATH``
|
||||
environment variable contains ``$HOME/.local/bin``.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
export PATH=$HOME/.local/bin:$PATH
|
||||
pip3.6 install --user ocrmypdf
|
||||
|
||||
To add JBIG2 encoding, see :ref:`jbig2`.
|
||||
|
||||
Arch Linux (AUR)
|
||||
----------------
|
||||
|
||||
.. image:: https://repology.org/badge/version-for-repo/aur/ocrmypdf.svg
|
||||
:alt: ArchLinux
|
||||
:target: https://repology.org/metapackage/ocrmypdf
|
||||
|
||||
There is an `Arch User Repository (AUR) package for OCRmyPDF
|
||||
<https://aur.archlinux.org/packages/ocrmypdf/>`__.
|
||||
|
||||
Installing AUR packages as root is not allowed, so you must first `setup a
|
||||
non-root user
|
||||
<https://wiki.archlinux.org/index.php/Users_and_groups#User_management>`__ and
|
||||
`configure sudo <https://wiki.archlinux.org/index.php/Sudo#Configuration>`__.
|
||||
The standard Docker image, ``archlinux/base:latest``, does **not** have a
|
||||
non-root user configured, so users of that image must follow these guides. If
|
||||
you are using a VM image, such as `the official Vagrant image
|
||||
<https://app.vagrantup.com/archlinux/boxes/archlinux>`__, this work may already
|
||||
be completed for you.
|
||||
|
||||
Next you should install the `base-devel package group
|
||||
<https://www.archlinux.org/groups/x86_64/base-devel/>`__. This includes the
|
||||
standard tooling needed to build packages, such as a compiler and binary tools.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
sudo pacman -S base-devel
|
||||
|
||||
Now you are ready to install the OCRmyPDF package.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
curl -O https://aur.archlinux.org/cgit/aur.git/snapshot/ocrmypdf.tar.gz
|
||||
tar xvzf ocrmypdf.tar.gz
|
||||
cd ocrmypdf
|
||||
makepkg -sri
|
||||
|
||||
At this point you will have a working install of OCRmyPDF, but the Tesseract
|
||||
install won’t include any OCR language data. You can install `the
|
||||
tesseract-data package group
|
||||
<https://www.archlinux.org/groups/any/tesseract-data/>`__ to add all supported
|
||||
languages, or use that package listing to identify the appropriate package for
|
||||
your desired language.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
sudo pacman -S tesseract-data-eng
|
||||
|
||||
As an alternative to this manual procedure, consider using an `AUR helper
|
||||
<https://wiki.archlinux.org/index.php/AUR_helpers>`__. Such a tool will
|
||||
automatically fetch, build and install the AUR package, resolve dependencies
|
||||
(including dependencies on AUR packages), and ease the upgrade procedure.
|
||||
|
||||
If you have any difficulties with installation, check the repository package
|
||||
page.
|
||||
|
||||
.. note::
|
||||
|
||||
The OCRmyPDF AUR package currently omits the JBIG2 encoder. OCRmyPDF works
|
||||
fine without it but will produce larger output files. The encoder is
|
||||
available from `the jbig2enc-git AUR package
|
||||
<https://aur.archlinux.org/packages/jbig2enc-git/>`__ and may be installed
|
||||
using the same series of steps as for the installation OCRmyPDF AUR
|
||||
package. Alternatively, it may be built manually from source following the
|
||||
instructions in `Installing the JBIG2 encoder <jbig2>`__. If JBIG2 is
|
||||
installed, OCRmyPDF 7.0.0 and later will automatically detect it.
|
||||
|
||||
Alpine Linux
|
||||
------------
|
||||
|
||||
.. image:: https://repology.org/badge/version-for-repo/alpine_edge/ocrmypdf.svg
|
||||
:alt: Alpine Linux
|
||||
:target: https://repology.org/metapackage/ocrmypdf
|
||||
|
||||
To install OCRmyPDF for Alpine Linux:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
apk add ocrmypdf
|
||||
|
||||
Mageia 7
|
||||
--------
|
||||
|
||||
Install the following dependencies:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
# As root user
|
||||
urpmi.update -a
|
||||
urpmi \
|
||||
ghostscript \
|
||||
icc-profiles-openicc \
|
||||
jbig2dec \
|
||||
lib64leptonica5 \
|
||||
pngquant \
|
||||
python3-pip \
|
||||
python3-cffi \
|
||||
python3-distutils-extra \
|
||||
python3-pkg-resources \
|
||||
python3-reportlab \
|
||||
qpdf \
|
||||
tesseract \
|
||||
tesseract-osd \
|
||||
tesseract-eng \
|
||||
tesseract-fra
|
||||
|
||||
To install ocrmypdf for the system:
|
||||
|
||||
# As root user
|
||||
pip3 install ocrmypdf
|
||||
ldconfig
|
||||
|
||||
Or, to install for the current user only:
|
||||
|
||||
export PATH=$HOME/.local/bin:$PATH
|
||||
pip3 install --user ocrmypdf
|
||||
|
||||
Other Linux packages
|
||||
--------------------
|
||||
|
||||
See the
|
||||
`Repology <https://repology.org/metapackage/ocrmypdf/versions>`__ page.
|
||||
|
||||
In general, first install the OCRmyPDF package for your system, then
|
||||
optionally use the procedure `Installing with Python
|
||||
pip <#installing-with-python-pip>`__ to install a more recent version.
|
||||
|
||||
Installing on macOS
|
||||
===================
|
||||
|
||||
Homebrew
|
||||
--------
|
||||
|
||||
.. image:: https://img.shields.io/homebrew/v/ocrmypdf.svg
|
||||
:alt: homebrew
|
||||
:target: http://brewformulas.org/Ocrmypdf
|
||||
|
||||
OCRmyPDF is now a standard `Homebrew <https://brew.sh>`__ formula. To
|
||||
install on macOS:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
brew install ocrmypdf
|
||||
|
||||
This will include only the English language pack. If you need other
|
||||
languages you can optionally install them all:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
brew install tesseract-lang # Optional: Install all language packs
|
||||
|
||||
.. note::
|
||||
|
||||
Users who previously installed OCRmyPDF on macOS using
|
||||
``pip install ocrmypdf`` should remove the pip version
|
||||
(``pip3 uninstall ocrmypdf``) before switching to the Homebrew
|
||||
version.
|
||||
|
||||
.. note::
|
||||
|
||||
Users who previously installed OCRmyPDF from the private tap should
|
||||
switch to the mainline version (``brew untap jbarlow83/ocrmypdf``)
|
||||
and install from there.
|
||||
|
||||
Manual installation on macOS
|
||||
----------------------------
|
||||
|
||||
These instructions probably work on all macOS supported by Homebrew, and are
|
||||
for installing a more current version of OCRmyPDF than is available from
|
||||
Homebrew. Note that the Homebrew versions usually track the release versions
|
||||
fairly closely.
|
||||
|
||||
If it's not already present, `install Homebrew <http://brew.sh/>`__.
|
||||
|
||||
Update Homebrew:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
brew update
|
||||
|
||||
Install or upgrade the required Homebrew packages, if any are missing.
|
||||
To do this, use ``brew edit ocrmypdf`` to obtain a recent list of Homebrew
|
||||
dependencies. You could also check the ``azure-pipelines.yml``.
|
||||
|
||||
This will include the English, French, German and Spanish language
|
||||
packs. If you need other languages you can optionally install them all:
|
||||
|
||||
.. _macos-all-languages:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
brew install tesseract-lang # Option 2: for all language packs
|
||||
|
||||
Update the homebrew pip:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
pip3 install --upgrade pip
|
||||
|
||||
You can then install OCRmyPDF from PyPI, for the current user:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
pip3 install --user ocrmypdf
|
||||
|
||||
or system-wide:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
pip3 install ocrmypdf
|
||||
|
||||
The command line program should now be available:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
ocrmypdf --help
|
||||
|
||||
Installing on Windows
|
||||
=====================
|
||||
|
||||
Native Windows
|
||||
--------------
|
||||
|
||||
.. note::
|
||||
|
||||
It is easier to install OCRmyPDF on Windows Subsystem for Linux.
|
||||
|
||||
.. note::
|
||||
|
||||
Administrator privileges will be required for some of these steps.
|
||||
|
||||
You must install the following for Windows:
|
||||
|
||||
* Python 3.7 (64-bit) or later
|
||||
* Tesseract 4.0 or later
|
||||
* Ghostscript 9.50 or later
|
||||
|
||||
You can install these with the Chocolatey package manager:
|
||||
|
||||
* ``choco install python3``
|
||||
* ``choco install --pre tesseract``
|
||||
* ``choco install ghostscript``
|
||||
|
||||
Also consider adding:
|
||||
|
||||
* ``choco install pngquant``
|
||||
|
||||
Windows 10 64-bit and 64-bit versions of applications are recommended. Earlier
|
||||
versions of Windows and 32-bit versions of these programs are not tested, and not
|
||||
supported at this time.
|
||||
|
||||
OCRmyPDF will check for Tesseract-OCR and Ghostscript in your Program Files folder.
|
||||
If they are in some other location, you may need to modify the ``PATH``
|
||||
environment variable so Tesseract, Ghostscript, and other any optional executables can
|
||||
be found. You can enter it in the command line or
|
||||
`follow these directions <https://www.computerhope.com/issues/ch000549.htm#dospath>`_
|
||||
to make the change persistent and system-wide.
|
||||
|
||||
You may then use pip to install ocrmypdf:
|
||||
|
||||
* ``pip install ocrmypdf``
|
||||
|
||||
Windows Subsystem for Linux
|
||||
---------------------------
|
||||
|
||||
#. Install Ubuntu 18.04 for Windows Subsystem for Linux, if not already installed.
|
||||
#. Follow the procedure to install :ref:`OCRmyPDF on Ubuntu 18.04 <ubuntu-lts-latest>`.
|
||||
#. Open the Windows command prompt and create a symlink:
|
||||
|
||||
.. code-block:: powershell
|
||||
|
||||
wsl sudo ln -s /home/$USER/.local/bin/ocrmypdf /usr/local/bin/ocrmypdf
|
||||
|
||||
Then confirm that the expected version from PyPI (|latest|) is installed:
|
||||
|
||||
.. code-block:: powershell
|
||||
|
||||
wsl ocrmypdf --version
|
||||
|
||||
You can then run OCRmyPDF in the Windows command prompt or Powershell, prefixing
|
||||
``wsl``, and call it from Windows programs or batch files.
|
||||
|
||||
Cygwin64
|
||||
--------
|
||||
|
||||
First install the the following prerequisite Cygwin packages using ``setup-x86_64.exe``::
|
||||
|
||||
python36 (or later)
|
||||
python3?-devel
|
||||
python3?-pip
|
||||
python3?-lxml
|
||||
python3?-imaging
|
||||
|
||||
(where 3? means match the version of python3 you installed)
|
||||
|
||||
gcc-g++
|
||||
ghostscript (<=9.50 or >=9.52-2 see note below)
|
||||
libexempi3
|
||||
libexempi-devel
|
||||
libffi6
|
||||
libffi-devel
|
||||
pngquant
|
||||
qpdf
|
||||
libqpdf-devel
|
||||
tesseract-ocr
|
||||
tesseract-ocr-devel
|
||||
|
||||
.. note::
|
||||
|
||||
The Cygwin package for Ghostscript in versions 9.52 and
|
||||
9.52-1 contained a bug that caused an exception to occur when
|
||||
ocrmypdf invoked gs. Make sure you have either 9.50 (or earlier)
|
||||
or 9.52-2 (or later).
|
||||
|
||||
Then open a Cygwin terminal (i.e. ``mintty``), run the following commands. Note
|
||||
that if you are using the version of ``pip`` that was installed with the Cygwin
|
||||
Python package, the command name will be ``pip3``. If you have since updated
|
||||
``pip`` (with, for instance ``pip3 install --upgrade pip``) the the command is
|
||||
likely just ``pip`` instead of ``pip3``:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
pip3 install wheel
|
||||
pip3 install ocrmypdf
|
||||
|
||||
The optional dependency "unpaper" that is currently not available under Cygwin.
|
||||
Without it, certain options such as ``--clean`` will produce an error message.
|
||||
However, the OCR-to-text-layer functionality is available.
|
||||
|
||||
Docker
|
||||
------
|
||||
|
||||
You can also :ref:`Install the Docker <docker-install>` container on Windows. Ensure that
|
||||
your command prompt can run the docker "hello world" container.
|
||||
|
||||
Installing on FreeBSD
|
||||
=====================
|
||||
|
||||
.. image:: https://repology.org/badge/version-for-repo/freebsd/python:ocrmypdf.svg
|
||||
:alt: FreeBSD
|
||||
:target: https://repology.org/project/python:ocrmypdf/versions
|
||||
|
||||
FreeBSD 11.3, 12.0, 12.1-RELEASE and 13.0-CURRENT are supported. Other
|
||||
versions likely work but have not been tested.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
pkg install py37-ocrmypdf
|
||||
|
||||
To install a more recent version, you could attempt to first install the system
|
||||
version with ``pkg``, then use ``pip install --user ocrmypdf``.
|
||||
|
||||
Installing the Docker image
|
||||
===========================
|
||||
|
||||
For some users, installing the Docker image will be easier than
|
||||
installing all of OCRmyPDF's dependencies.
|
||||
|
||||
See `OCRmyPDF Docker Image <docker>`__ for more information.
|
||||
|
||||
Installing with Python pip
|
||||
==========================
|
||||
|
||||
OCRmyPDF is delivered by PyPI because it is a convenient way to install
|
||||
the latest version. However, PyPI and ``pip`` cannot address the fact
|
||||
that ``ocrmypdf`` depends on certain non-Python system libraries and
|
||||
programs being instsalled.
|
||||
|
||||
For best results, first install `your platform's
|
||||
version <https://repology.org/metapackage/ocrmypdf/versions>`__ of
|
||||
``ocrmypdf``, using the instructions elsewhere in this document. Then
|
||||
you can use ``pip`` to get the latest version if your platform version
|
||||
is out of date. Chances are that this will satisfy most dependencies.
|
||||
|
||||
Use ``ocrmypdf --version`` to confirm what version was installed.
|
||||
|
||||
Then you can install the latest OCRmyPDF from the Python wheels. First
|
||||
try:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
pip3 install --user ocrmypdf
|
||||
|
||||
You should then be able to run ``ocrmypdf --version`` and see that the
|
||||
latest version was located.
|
||||
|
||||
Since ``pip3 install --user`` does not work correctly on some platforms,
|
||||
notably Ubuntu 16.04 and older, and the Homebrew version of Python,
|
||||
instead use this for a system wide installation:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
pip3 install ocrmypdf
|
||||
|
||||
.. note::
|
||||
|
||||
AArch64 (ARM64) users: this process will be difficult because most
|
||||
Python packages are not available as binary wheels for your platform.
|
||||
You're probably better off using a platform install on Debian, Ubuntu,
|
||||
or Fedora.
|
||||
|
||||
Requirements for pip and HEAD install
|
||||
-------------------------------------
|
||||
|
||||
OCRmyPDF currently requires these external programs and libraries to be
|
||||
installed, and must be satisfied using the operating system package
|
||||
manager. ``pip`` cannot provide them.
|
||||
|
||||
- Python 3.6 or newer
|
||||
- Ghostscript 9.15 or newer
|
||||
- qpdf 8.1.0 or newer
|
||||
- Tesseract 4.0.0-beta or newer
|
||||
|
||||
As of ocrmypdf 7.2.1, the following versions are recommended:
|
||||
|
||||
- Python 3.7 or 3.8
|
||||
- Ghostscript 9.23 or newer
|
||||
- qpdf 8.2.1
|
||||
- Tesseract 4.0.0 or newer
|
||||
- jbig2enc 0.29 or newer
|
||||
- pngquant 2.5 or newer
|
||||
- unpaper 6.1
|
||||
|
||||
jbig2enc, pngquant, and unpaper are optional. If missing certain
|
||||
features are disabled. OCRmyPDF will discover them as soon as they are
|
||||
available.
|
||||
|
||||
**jbig2enc**, if present, will be used to optimize the encoding of
|
||||
monochrome images. This can significantly reduce the file size of the
|
||||
output file. It is not required.
|
||||
`jbig2enc <https://github.com/agl/jbig2enc>`__ is not generally
|
||||
available for Ubuntu or Debian due to lingering concerns about patent
|
||||
issues, but can easily be built from source. To add JBIG2 encoding, see
|
||||
:ref:`jbig2`.
|
||||
|
||||
**pngquant**, if present, is optionally used to optimize the encoding of
|
||||
PNG-style images in PDFs (actually, any that are that losslessly
|
||||
encoded) by lossily quantizing to a smaller color palette. It is only
|
||||
activated then the ``--optimize`` argument is ``2`` or ``3``.
|
||||
|
||||
**unpaper**, if present, enables the ``--clean`` and ``--clean-final``
|
||||
command line options.
|
||||
|
||||
These are in addition to the Python packaging dependencies, meaning that
|
||||
unfortunately, the ``pip install`` command cannot satisfy all of them.
|
||||
|
||||
Installing HEAD revision from sources
|
||||
=====================================
|
||||
|
||||
If you have ``git`` and Python 3.6 or newer installed, you can install
|
||||
from source. When the ``pip`` installer runs, it will alert you if
|
||||
dependencies are missing.
|
||||
|
||||
If you prefer to build every from source, you will need to `build
|
||||
pikepdf from
|
||||
source <https://pikepdf.readthedocs.io/en/latest/installation.html#building-from-source>`__.
|
||||
First ensure you can build and install pikepdf.
|
||||
|
||||
To install the HEAD revision from sources in the current Python 3
|
||||
environment:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
pip3 install git+https://github.com/jbarlow83/OCRmyPDF.git
|
||||
|
||||
Or, to install in `development
|
||||
mode <https://pythonhosted.org/setuptools/setuptools.html#development-mode>`__,
|
||||
allowing customization of OCRmyPDF, use the ``-e`` flag:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
pip3 install -e git+https://github.com/jbarlow83/OCRmyPDF.git
|
||||
|
||||
You may find it easiest to install in a virtual environment, rather than
|
||||
system-wide:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
git clone -b master https://github.com/jbarlow83/OCRmyPDF.git
|
||||
python3 -m venv
|
||||
source venv/bin/activate
|
||||
cd OCRmyPDF
|
||||
pip3 install .
|
||||
|
||||
However, ``ocrmypdf`` will only be accessible on the system PATH when
|
||||
you activate the virtual environment.
|
||||
|
||||
To run the program:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
ocrmypdf --help
|
||||
|
||||
If not yet installed, the script will notify you about dependencies that
|
||||
need to be installed. The script requires specific versions of the
|
||||
dependencies. Older version than the ones mentioned in the release notes
|
||||
are likely not to be compatible to OCRmyPDF.
|
||||
|
||||
For development
|
||||
---------------
|
||||
|
||||
To install all of the development and test requirements:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
git clone -b master https://github.com/jbarlow83/OCRmyPDF.git
|
||||
python3 -m venv
|
||||
source venv/bin/activate
|
||||
cd OCRmyPDF
|
||||
pip install -e .
|
||||
pip install -r requirements/dev.txt -r requirements/test.txt
|
||||
|
||||
To add JBIG2 encoding, see :ref:`jbig2`.
|
||||
|
||||
Shell completions
|
||||
=================
|
||||
|
||||
Completions for ``bash`` and ``fish`` are available in the project's
|
||||
``misc/completion`` folder. The ``bash`` completions are likely ``zsh``
|
||||
compatible but this has not been confirmed. Package maintainers, please
|
||||
install these at the appropriate locations for your system.
|
||||
|
||||
To manually install the ``bash`` completion, copy
|
||||
``misc/completion/ocrmypdf.bash`` to ``/etc/bash_completion.d/ocrmypdf``
|
||||
(rename the file).
|
||||
|
||||
To manually install the ``fish`` completion, copy
|
||||
``misc/completion/ocrmypdf.fish`` to
|
||||
``~/.config/fish/completions/ocrmypdf.fish``.
|
||||
@@ -1,228 +0,0 @@
|
||||
============
|
||||
Introduction
|
||||
============
|
||||
|
||||
OCRmyPDF is a Python 3 application and library that adds OCR layers to PDFs.
|
||||
|
||||
About OCR
|
||||
=========
|
||||
|
||||
`Optical character
|
||||
recognition <https://en.wikipedia.org/wiki/Optical_character_recognition>`__
|
||||
is technology that converts images of typed or handwritten text, such as
|
||||
in a scanned document, to computer text that can be selected, searched and copied.
|
||||
|
||||
OCRmyPDF uses
|
||||
`Tesseract <https://github.com/tesseract-ocr/tesseract>`__, the best
|
||||
available open source OCR engine, to perform OCR.
|
||||
|
||||
.. _raster-vector:
|
||||
|
||||
About PDFs
|
||||
==========
|
||||
|
||||
PDFs are page description files that attempts to preserve a layout
|
||||
exactly. They contain `vector
|
||||
graphics <http://vector-conversions.com/vectorizing/raster_vs_vector.html>`__
|
||||
that can contain raster objects such as scanned images. Because PDFs can
|
||||
contain multiple pages (unlike many image formats) and can contain fonts
|
||||
and text, it is a good formats for exchanging scanned documents.
|
||||
|
||||
|image|
|
||||
|
||||
A PDF page might contain multiple images, even if it only appears to
|
||||
have one image. Some scanners or scanning software will segment pages
|
||||
into monochromatic text and color regions for example, to improve the
|
||||
compression ratio and appearance of the page.
|
||||
|
||||
Rasterizing a PDF is the process of generating an image suitable for
|
||||
display or analyzing with an OCR engine. OCR engines like Tesseract work
|
||||
with images, not vector objects.
|
||||
|
||||
About PDF/A
|
||||
===========
|
||||
|
||||
`PDF/A <https://en.wikipedia.org/wiki/PDF/A>`__ is an ISO-standardized
|
||||
subset of the full PDF specification that is designed for archiving (the
|
||||
'A' stands for Archive). PDF/A differs from PDF primarily by omitting
|
||||
features that would make it difficult to read the file in the future,
|
||||
such as embedded Javascript, video, audio and references to external
|
||||
fonts. All fonts and resources needed to interpret the PDF must be
|
||||
contained within it. Because PDF/A disables Javascript and other types
|
||||
of embedded content, it is probably more secure.
|
||||
|
||||
There are various conformance levels and versions, such as "PDF/A-2b".
|
||||
|
||||
Generally speaking, the best format for scanned documents is PDF/A. Some
|
||||
governments and jurisdictions, US Courts in particular, `mandate the use
|
||||
of PDF/A <https://pdfblog.com/2012/02/13/what-is-pdfa/>`__ for scanned
|
||||
documents.
|
||||
|
||||
Since most people who scan documents are interested in reading them
|
||||
indefinitely into the future, OCRmyPDF generates PDF/A-2b by default.
|
||||
|
||||
PDF/A has a few drawbacks. Some PDF viewers include an alert that the
|
||||
file is a PDF/A, which may confuse some users. It also tends to produce
|
||||
larger files than PDF, because it embeds certain resources even if they
|
||||
are commonly available. PDF/A files can be digitally signed, but may not
|
||||
be encrypted, to ensure they can be read in the future. Fortunately,
|
||||
converting from PDF/A to a regular PDF is trivial, and any PDF viewer
|
||||
can view PDF/A.
|
||||
|
||||
What OCRmyPDF does
|
||||
==================
|
||||
|
||||
OCRmyPDF analyzes each page of a PDF to determine the colorspace and
|
||||
resolution (DPI) needed to capture all of the information on that page
|
||||
without losing content. It uses
|
||||
`Ghostscript <http://ghostscript.com/>`__ to rasterize the page, and
|
||||
then performs on OCR on the rasterized image to create an OCR "layer".
|
||||
The layer is then grafted back onto the original PDF.
|
||||
|
||||
While one can use a program like Ghostscript or ImageMagick to get an
|
||||
image and put the image through Tesseract, that actually creates a new
|
||||
PDF and many details may be lost. OCRmyPDF can produce a minimally
|
||||
changed PDF as output.
|
||||
|
||||
OCRmyPDF also some image processing options like deskew which improve
|
||||
the appearance of files and quality of OCR. When these are used, the OCR
|
||||
layer is grafted onto the processed image instead.
|
||||
|
||||
By default, OCRmyPDF produces archival PDFs – PDF/A, which are a
|
||||
stricter subset of PDF features designed for long term archives. If
|
||||
regular PDFs are desired, this can be disabled with
|
||||
``--output-type pdf``.
|
||||
|
||||
Why you shouldn't do this manually
|
||||
==================================
|
||||
|
||||
A PDF is similar to an HTML file, in that it contains document structure
|
||||
along with images. Sometimes a PDF does nothing more than present a full
|
||||
page image, but often there is additional content that would be lost.
|
||||
|
||||
A manual process could work like either of these:
|
||||
|
||||
1. Rasterize each page as an image, OCR the images, and combine the
|
||||
output into a PDF. This preserves the layout of each page, but
|
||||
resamples all images (possibly losing quality, increasing file size,
|
||||
introducing compression artifacts, etc.).
|
||||
2. Extract each image, OCR, and combine the output into a PDF. This
|
||||
loses the context in which images are used in the PDF, meaning that
|
||||
cropping, rotation and scaling of pages may be lost. Some scanned
|
||||
PDFs use multiple images segmented into black and white, grayscale
|
||||
and color regions, with stencil masks to prevent overlap, as this can
|
||||
enhance the appearance of a file while reducing file size. Clearly,
|
||||
reassembling these images will be easy. This also loses and text or
|
||||
vector art on any pages in a PDF with both scanned and pure digital
|
||||
content.
|
||||
|
||||
In the case of a PDF that is nothing other than a container of images
|
||||
(no rotation, scaling, cropping, one image per page), the second
|
||||
approach can be lossless.
|
||||
|
||||
OCRmyPDF uses several strategies depending on input options and the
|
||||
input PDF itself, but generally speaking it rasterizes a page for OCR
|
||||
and then grafts the OCR back onto the original. As such it can handle
|
||||
complex PDFs and still preserve their contents as much as possible.
|
||||
|
||||
OCRmyPDF also supports a many, many edge cases that have cropped over
|
||||
several years of development. We support PDF features like images inside
|
||||
of Form XObjects, and pages with UserUnit scaling. We support rare image
|
||||
formats like non-monochrome 1-bit images. We warn about files you may
|
||||
not to OCR. Thanks to pikepdf and QPDF, we auto-repair PDFs that are
|
||||
damaged. (Not that you need to know what any of these are! You should be
|
||||
able to throw any PDF at it.)
|
||||
|
||||
Limitations
|
||||
===========
|
||||
|
||||
OCRmyPDF is limited by the Tesseract OCR engine. As such it experiences
|
||||
these limitations, as do any other programs that rely on Tesseract:
|
||||
|
||||
- The OCR is not as accurate as commercial solutions such as Abbyy.
|
||||
- It is not capable of recognizing handwriting.
|
||||
- It may find gibberish and report this as OCR output.
|
||||
- If a document contains languages outside of those given in the
|
||||
``-l LANG`` arguments, results may be poor.
|
||||
- It is not always good at analyzing the natural reading order of
|
||||
documents. For example, it may fail to recognize that a document
|
||||
contains two columns, and may try to join text across columns.
|
||||
- Poor quality scans may produce poor quality OCR. Garbage in, garbage
|
||||
out.
|
||||
- It does not expose information about what font family text belongs
|
||||
to.
|
||||
|
||||
OCRmyPDF is also limited by the PDF specification:
|
||||
|
||||
- PDF encodes the position of text glyphs but does not encode document
|
||||
structure. There is no markup that divides a document in sections,
|
||||
paragraphs, sentences, or even words (since blank spaces are not
|
||||
represented). As such all elements of document structure including
|
||||
the spaces between words must be derived heuristically. Some PDF
|
||||
viewers do a better job of this than others.
|
||||
- Because some popular open source PDF viewers have a particularly hard
|
||||
time with spaces between words, OCRmyPDF appends a space to each text
|
||||
element as a workaround (when using ``--pdf-renderer hocr``). While
|
||||
this mixes document structure with graphical information that ideally
|
||||
should be left to the PDF viewer to interpret, it improves
|
||||
compatibility with some viewers and does not cause problems for
|
||||
better ones.
|
||||
|
||||
Ghostscript also imposes some limitations:
|
||||
|
||||
- PDFs containing JBIG2-encoded content will be converted to CCITT
|
||||
Group4 encoding, which has lower compression ratios, if Ghostscript
|
||||
PDF/A is enabled.
|
||||
- PDFs containing JPEG 2000-encoded content will be converted to JPEG
|
||||
encoding, which may introduce compression artifacts, if Ghostscript
|
||||
PDF/A is enabled.
|
||||
- Ghostscript may transcode grayscale and color images, either lossy to
|
||||
lossless or lossless to lossy, based on an internal algorithm. This
|
||||
behavior can be suppressed by setting ``--pdfa-image-compression`` to
|
||||
``jpeg`` or ``lossless`` to set all images to one type or the other.
|
||||
Ghostscript has no option to maintain the input image's format.
|
||||
(Ghostscript 9.25+ can copy JPEG images without transcoding them;
|
||||
earlier versions will transcode.)
|
||||
- Ghostscript's PDF/A conversion removes any XMP metadata that is not
|
||||
one of the standard XMP metadata namespaces for PDFs. In particular,
|
||||
PRISM Metdata is removed.
|
||||
|
||||
Regarding OCRmyPDF itself:
|
||||
|
||||
- PDFs that use transparency are not currently represented in the test
|
||||
suite
|
||||
|
||||
Similar programs
|
||||
================
|
||||
|
||||
To the author's knowledge, OCRmyPDF is the most feature-rich and
|
||||
thoroughly tested command line OCR PDF conversion tool. If it does not
|
||||
meet your needs, contributions and suggestions are welcome. If not,
|
||||
consider one of these similar open source programs:
|
||||
|
||||
- pdf2pdfocr
|
||||
- pdfsandwich
|
||||
- pypdfocr
|
||||
- pdfbeads
|
||||
|
||||
Web front-ends
|
||||
==============
|
||||
|
||||
The Docker image ``ocrmypdf`` provides a web service front-end
|
||||
that allows files to submitted over HTTP and the results "downloaded".
|
||||
This is an HTTP server intended to simplify web services deployments; it
|
||||
is not intended to be deployed on the public internet and no real
|
||||
security measures to speak of.
|
||||
|
||||
In addition, the following third-party integrations are available:
|
||||
|
||||
- `Nextcloud OCR <https://github.com/janis91/ocr>`__ is a free software
|
||||
plugin for the Nextcloud private cloud software
|
||||
|
||||
OCRmyPDF is not designed to be secure against malware-bearing PDFs (see
|
||||
`Using OCRmyPDF online <ocr-service>`__). Users should ensure they
|
||||
comply with OCRmyPDF's licenses and the licenses of all dependencies. In
|
||||
particular, OCRmyPDF requires Ghostscript, which is licensed under
|
||||
AGPLv3.
|
||||
|
||||
.. |image| image:: images/bitmap_vs_svg.svg
|
||||
@@ -1,55 +0,0 @@
|
||||
.. _jbig2:
|
||||
|
||||
============================
|
||||
Installing the JBIG2 encoder
|
||||
============================
|
||||
|
||||
Most Linux distributions do not include a JBIG2 encoder since JBIG2
|
||||
encoding was patented for a long time. All known JBIG2 US patents have
|
||||
expired as of 2017, but it is possible that unknown patents exist.
|
||||
|
||||
JBIG2 encoding is recommended for OCRmyPDF and is used to losslessly
|
||||
create smaller PDFs. If JBIG2 encoding not available, lower quality
|
||||
encodings will be used.
|
||||
|
||||
JBIG2 decoding is not patented and is performed automatically by most
|
||||
PDF viewers. It is widely supported has been part of the PDF
|
||||
specification since 2001.
|
||||
|
||||
On macOS, Homebrew packages jbig2enc and OCRmyPDF includes it by
|
||||
default. The Docker image for OCRmyPDF also builds its own JBIG2 encoder
|
||||
from source.
|
||||
|
||||
For all other Linux, you must build a JBIG2 encoder from source:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
git clone https://github.com/agl/jbig2enc
|
||||
cd jbig2enc
|
||||
./autogen.sh
|
||||
./configure && make
|
||||
[sudo] make install
|
||||
|
||||
.. _jbig2-lossy:
|
||||
|
||||
Lossy mode JBIG2
|
||||
================
|
||||
|
||||
OCRmyPDF provides lossy mode JBIG2 as an advanced feature. Users should
|
||||
`review the technical concerns with JBIG2 in lossy
|
||||
mode <https://abbyy.technology/en:kb:tip:jbig2_compression_and_ocr>`__
|
||||
and decide if this feature is acceptable for their use case.
|
||||
|
||||
JBIG2 lossy mode does achieve higher compression ratios than any other
|
||||
monochrome (bitonal) compression technology; for large text documents
|
||||
the savings are considerable. JBIG2 lossless still gives great
|
||||
compression ratios and is a major improvement over the older CCITT G4
|
||||
standard. As explained above, there is some risk of substitution errors.
|
||||
|
||||
To turn on JBIG2 lossy mode, add the argument ``--jbig2-lossy``.
|
||||
``--optimize {1,2,3}`` are necessary for the argument to take effect
|
||||
also required. Also, a JBIG2 encoder must be installed as described in
|
||||
the previous section.
|
||||
|
||||
*Due to an oversight, ocrmypdf v7.0 and v7.1 used lossy mode by
|
||||
default.*
|
||||
@@ -1,73 +0,0 @@
|
||||
.. _lang-packs:
|
||||
|
||||
====================================
|
||||
Installing additional language packs
|
||||
====================================
|
||||
|
||||
OCRmyPDF uses Tesseract for OCR, and relies on its language packs for all languages.
|
||||
On most platforms, English is installed with Tesseract by default, but not always.
|
||||
|
||||
Tesseract supports `most
|
||||
languages <https://github.com/tesseract-ocr/tesseract/blob/master/doc/tesseract.1.asc#languages>`__.
|
||||
Languages are identified by standardized three-letter codes (called ISO 639-2 Alpha-3).
|
||||
Tesseract's documentation also lists the three-letter code for your language.
|
||||
Some are anglicized, e.g. Spanish is ``spa`` rather than ``esp``, while others
|
||||
are not, e.g. German is ``deu``.
|
||||
|
||||
After you have installed a language pack, you can use it ``ocrmypdf -l <language>``,
|
||||
for example ``ocrmypdf -l spa``. For multilingual documents, you can specify
|
||||
all languages to be expected, e.g. ``ocrmypdf -l eng+fra`` for English and French.
|
||||
English is assumed by default unless other language(s) are specified.
|
||||
|
||||
For Linux users, you can often find packages that provide language
|
||||
packs:
|
||||
|
||||
Debian and Ubuntu users
|
||||
=======================
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
# Display a list of all Tesseract language packs
|
||||
apt-cache search tesseract-ocr
|
||||
|
||||
# Install Chinese Simplified language pack
|
||||
apt-get install tesseract-ocr-chi-sim
|
||||
|
||||
You can then pass the ``-l LANG`` argument to OCRmyPDF to give a hint as
|
||||
to what languages it should search for. Multiple languages can be
|
||||
requested using either ``-l eng+fre`` (English and French) or
|
||||
``-l eng -l fre``.
|
||||
|
||||
Fedora users
|
||||
============
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
# Display a list of all Tesseract language packs
|
||||
dnf search tesseract
|
||||
|
||||
# Install Chinese Simplified language pack
|
||||
dnf install tesseract-langpack-chi_sim
|
||||
|
||||
You can then pass the ``-l LANG`` argument to OCRmyPDF to give a hint as
|
||||
to what languages it should search for. Multiple languages can be
|
||||
requested using either ``-l eng+fre`` (English and French) or
|
||||
``-l eng -l fre``.
|
||||
|
||||
macOS users
|
||||
===========
|
||||
|
||||
You can install additional language packs by
|
||||
:ref:`installing Tesseract using Homebrew with all language packs <macos-all-languages>`.
|
||||
|
||||
Docker users
|
||||
============
|
||||
|
||||
Users of the OCRmyPDF Docker image should install language packs into a
|
||||
derived Docker image as
|
||||
:ref:`described in that section <docker-lang-packs>`.
|
||||
|
||||
Windows users
|
||||
=============
|
||||
|
||||
The Tesseract installer provided by Chocolatey already includes 100 languages.
|
||||
@@ -1,75 +0,0 @@
|
||||
================
|
||||
PDF optimization
|
||||
================
|
||||
|
||||
OCRmyPDF includes an image-oriented PDF optimizer. By default, the optimizer
|
||||
runs with safe settings with the goal of improving compression at no loss of
|
||||
quality. At higher optimization levels, lossy optimizations may be applied and
|
||||
tuned. Optimization occurs after OCR, and only if OCR succeeded. It does not
|
||||
perform other possible optimizations such as deduplicating resources,
|
||||
consolidating fonts, simplifying vector drawings, or anything of that nature.
|
||||
|
||||
Optimization ranges from ``-O0`` through ``-O3``, where ``0`` disables
|
||||
optimization and ``3`` implements all options. ``1``, the default, performs only
|
||||
safe and lossless optimizations. (This is similar to GCC's optimization
|
||||
parameter.) The exact type of optimizations performed will vary over time.
|
||||
|
||||
PDF optimization requires third-party, optional tools for certain optimizations.
|
||||
If these are not installed or cannot be found by OCRmyPDF, optimization will not
|
||||
be as good.
|
||||
|
||||
Optimizations that always occurs
|
||||
================================
|
||||
|
||||
OCRmyPDF will automatically replace obsolete or inferior compression schemes
|
||||
such as RLE or LZW with superior schemes such as Deflate and converting
|
||||
monochrome images to CCITT G4. Since this is harmless it always occurs and there
|
||||
is no way to disable it. Other non-image compressed objects are compressed as
|
||||
well.
|
||||
|
||||
Fast web view
|
||||
=============
|
||||
|
||||
OCRmyPDF automatically optimizes PDFs for "fast web view" in Adobe Acrobat's
|
||||
parlance, or equivalently, linearizes PDFs so that the resources they reference
|
||||
are presented in the order a viewer needs them for sequential display. This
|
||||
reduces the latency of viewing a PDF both online and from local storage. This
|
||||
actually slightly increases the file size.
|
||||
|
||||
To disable this optimization and all others, use ``ocrmypdf --optimize 0 ...``
|
||||
or the shorthand ``-O0``.
|
||||
|
||||
Lossless optimizations
|
||||
======================
|
||||
|
||||
At optimization level ``-O1`` (the default), OCRmyPDF will also attempt lossless
|
||||
image optimization.
|
||||
|
||||
If a JBIG2 encoder is available, then monochrome images will be converted to
|
||||
JBIG2, with the potential for huge savings on large black and white images,
|
||||
since JBIG2 is far more efficient than any other monochrome (bi-level)
|
||||
compression. (All known US patents related to JBIG2 have probably expired, but
|
||||
it remains the responsibility of the user to supply a JBIG2 encoder such as
|
||||
`jbig2enc <https://github.com/agl/jbig2enc>`__. OCRmyPDF does not implement
|
||||
JBIG2 encoding on its own.)
|
||||
|
||||
OCRmyPDF currently does not attempt to recompress losslessly compressed objects
|
||||
more aggressively.
|
||||
|
||||
Lossy optimizations
|
||||
===================
|
||||
|
||||
At optimization level ``-O2`` and ``-O3``, OCRmyPDF will some attempt lossy
|
||||
image optimization.
|
||||
|
||||
If ``pngquant`` is installed, OCRmyPDF will use it to perform quantize paletted
|
||||
images to reduce their size.
|
||||
|
||||
The quality of JPEGs may be lowered, on the assumption that a lower quality
|
||||
image may be suitable for storage after OCR.
|
||||
|
||||
It is not possible to optimize all image types. Uncommon image types may be
|
||||
skipped by the optimizer.
|
||||
|
||||
OCRmyPDF provides :ref:`lossy mode JBIG2 <jbig2-lossy>` as an advanced feature
|
||||
that additional requires the argument ``--jbig2-lossy``.
|
||||
@@ -1,161 +0,0 @@
|
||||
===================
|
||||
PDF security issues
|
||||
===================
|
||||
|
||||
OCRmyPDF should only be used on PDFs you trust. It is not designed to
|
||||
protect you against malware.
|
||||
|
||||
Recognizing that many users have an interest in handling PDFs and
|
||||
applying OCR to PDFs they did not generate themselves, this article
|
||||
discusses the security implications of PDFs and how users can protect
|
||||
themselves.
|
||||
|
||||
The disclaimer applies: this software has no warranties of any kind.
|
||||
|
||||
PDFs may contain malware
|
||||
========================
|
||||
|
||||
PDF is a rich, complex file format. The official PDF 1.7 specification,
|
||||
ISO 32000:2008, is hundreds of pages long and references several annexes
|
||||
each of which are similar in length. PDFs can contain video, audio, XML,
|
||||
JavaScript and other programming, and forms. In some cases, they can
|
||||
open internet connections to pre-selected URLs. All of these possible
|
||||
attack vectors.
|
||||
|
||||
In short, PDFs `may contain
|
||||
viruses <https://security.stackexchange.com/questions/64052/can-a-pdf-file-contain-a-virus>`__.
|
||||
|
||||
This
|
||||
`article <https://theinvisiblethings.blogspot.ca/2013/02/converting-untrusted-pdfs-into-trusted.html>`__
|
||||
describes a high-paranoia method which allows potentially hostile PDFs
|
||||
to be viewed and rasterized safely in a disposable virtual machine. A
|
||||
trusted PDF created in this manner is converted to images and loses all
|
||||
information making it searchable and losing all compression. OCRmyPDF
|
||||
could be used restore searchability.
|
||||
|
||||
How OCRmyPDF processes PDFs
|
||||
===========================
|
||||
|
||||
OCRmyPDF must open and interpret your PDF in order to insert an OCR
|
||||
layer. First, it runs all PDFs through
|
||||
`pikepdf <https://github.com/pikepdf/pikepdf>`__, a library based on
|
||||
`qpdf <https://github.com/qpdf/qpdf>`__, a program that repairs PDFs
|
||||
with syntax errors. This is done because, in the author's experience, a
|
||||
significant number of PDFs in the wild especially those created by
|
||||
scanners are not well-formed files. qpdf makes it more likely that
|
||||
OCRmyPDF will succeed, but offers no security guarantees. qpdf is also
|
||||
used to split the PDF into single page PDFs.
|
||||
|
||||
Finally, OCRmyPDF rasterizes each page of the PDF using
|
||||
`Ghostscript <http://ghostscript.com/>`__ in ``-dSAFER`` mode.
|
||||
|
||||
Depending on the options specified, OCRmyPDF may graft the OCR layer
|
||||
into the existing PDF or it may essentially reconstruct ("re-fry") a
|
||||
visually identical PDF that may be quite different at the binary level.
|
||||
That said, OCRmyPDF is not a tool designed for sanitizing PDFs.
|
||||
|
||||
.. _ocr-service:
|
||||
|
||||
Using OCRmyPDF online or as a service
|
||||
=====================================
|
||||
|
||||
OCRmyPDF is not designed for use as a public web service where a
|
||||
malicious user could upload a chosen PDF. In particular, it is not
|
||||
necessarily secure against PDF malware or PDFs that cause denial of
|
||||
service. OCRmyPDF relies on Ghostscript, and therefore, if deployed
|
||||
online one should be prepared to comply with Ghostscript's Affero GPL
|
||||
license, OCRmyPDF's GPL license, and any other licenses.
|
||||
|
||||
Setting aside these concerns, a side effect of OCRmyPDF is it may
|
||||
incidentally sanitize PDFs that contain certain types of malware. It
|
||||
repairs the PDF with pikepdf/libqpdf, which could correct malformed PDF
|
||||
structures that are part of an attack. When PDF/A output is selected
|
||||
(the default), the input PDF is partially reconstructed by Ghostscript.
|
||||
When ``--force-ocr`` is used, all pages are rasterized and reconverted
|
||||
to PDF, which could remove malware in embedded images.
|
||||
|
||||
OCRmyPDF should be relatively safe to use in a trusted intranet, with
|
||||
some considerations:
|
||||
|
||||
Limiting CPU usage
|
||||
------------------
|
||||
|
||||
OCRmyPDF will attempt to use all available CPUs and storage, so
|
||||
executing ``nice ocrmypdf`` or limiting the number of jobs with the
|
||||
``-j`` argument may ensure the server remains available. Another option
|
||||
would be run OCRmyPDF jobs inside a Docker container, a virtual machine,
|
||||
or a cloud instance, which can impose its own limits on CPU usage and be
|
||||
terminated "from orbit" if it fails to complete.
|
||||
|
||||
Temporary storage requirements
|
||||
------------------------------
|
||||
|
||||
OCRmyPDF will use a large amount of temporary storage for its work,
|
||||
proportional to the total number of pixels needed to rasterize the PDF.
|
||||
The raster image of a 8.5×11" color page at 300 DPI takes 25 MB
|
||||
uncompressed; OCRmyPDF saves its intermediates as PNG, but that still
|
||||
means it requires about 9 MB per intermediate based on average
|
||||
compression ratios. Multiple intermediates per page are also required,
|
||||
depending on the command line given. A rule of thumb would be to allow
|
||||
100 MB of temporary storage per page in a file – meaning that a small
|
||||
cloud servers or small VM partitions should be provisioned with plenty
|
||||
of extra space, if say, a 500 page file might be sent.
|
||||
|
||||
To check temporary storage usage on actual files, run
|
||||
``ocrmypdf -k ...`` which will preserve and print the path to temporary
|
||||
storage when the job is done.
|
||||
|
||||
To change where temporary files are stored, change the ``TMPDIR``
|
||||
environment variable for ocrmypdf's environment. (Python's
|
||||
``tempfile.gettempdir()`` returns the root directory in which temporary
|
||||
files will be stored.) For example, one could redirect ``TMPDIR`` to a
|
||||
large RAM disk to avoid wear on HDD/SSD and potentially improve
|
||||
performance. On Amazon Web Services, ``TMPDIR`` can be set to `empheral
|
||||
storage <https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/InstanceStorage.html>`__.
|
||||
|
||||
Timeouts
|
||||
--------
|
||||
|
||||
To prevent excessively long OCR jobs consider setting
|
||||
``--tesseract-timeout`` and/or ``--skip-big`` arguments. ``--skip-big``
|
||||
is particularly helpful if your PDFs include documents such as reports
|
||||
on standard page sizes with large images attached - often large images
|
||||
are not worth OCR'ing anyway.
|
||||
|
||||
Commercial alternatives
|
||||
-----------------------
|
||||
|
||||
The author also provides professional services that include OCR and
|
||||
building databases around PDFs, and is happy to provide consultation.
|
||||
|
||||
Abbyy Cloud OCR is a viable commercial alternative with a web services
|
||||
API.
|
||||
|
||||
Password protection, digital signatures and certification
|
||||
=========================================================
|
||||
|
||||
Password protected PDFs usually have two passwords, and owner and user
|
||||
password. When the user password is set to empty, PDF readers will open
|
||||
the file automatically and marked it as "(SECURED)". While not as
|
||||
reliable as a digital signature, this indicates that whoever set the
|
||||
password approved of the file at that time. When the user password is
|
||||
set, the document cannot be viewed without the password.
|
||||
|
||||
Either way, OCRmyPDF does not remove passwords from PDFs and exits with
|
||||
an error on encountering them.
|
||||
|
||||
``qpdf`` can remove passwords. If the owner and user password are set, a
|
||||
password is required for ``qpdf``. If only the owner password is set, then the
|
||||
password can be stripped, even if one does not have the owner password.
|
||||
|
||||
After OCR is applied, password protection is not permitted on PDF/A
|
||||
documents but the file can be converted to regular PDF.
|
||||
|
||||
Many programs exist which are capable of inserting an image of someone's
|
||||
signature. On its own, this offers no security guarantees. It is trivial
|
||||
to remove the signature image and apply it to other files. This practice
|
||||
offers no real security.
|
||||
|
||||
Important documents can be digitally signed and certified to attest to
|
||||
their authorship. OCRmyPDF cannot do this. Open source tools such as
|
||||
pdfbox (Java) have this capability as does Adobe Acrobat.
|
||||
@@ -1,22 +0,0 @@
|
||||
===========
|
||||
Performance
|
||||
===========
|
||||
|
||||
Some users have noticed that current versions of OCRmyPDF do not run as quickly
|
||||
as some older versions (specifically 6.x and older). This is because OCRmyPDF
|
||||
added image optimization as a postprocessing step, and it is enabled by default.
|
||||
|
||||
Speed
|
||||
=====
|
||||
|
||||
If running OCRmyPDF quickly is your main goal, you can use settings such as:
|
||||
|
||||
* ``--optimize 0`` to disable file size optimization
|
||||
* ``--output-type pdf`` to disable PDF/A generation
|
||||
* ``--fast-web-view 0`` to disable fast web view optimization
|
||||
* ``--skip-big`` to skip large images, if some pages have large images
|
||||
|
||||
You can also avoid:
|
||||
|
||||
* ``--force-ocr``
|
||||
* Image preprocessing
|
||||
@@ -1,392 +0,0 @@
|
||||
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
|
||||
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
|
||||
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
|
||||
<!-- Generated by graphviz version 2.40.1 (20161225.0304)
|
||||
-->
|
||||
<!-- Title: Pipeline: Pages: 1 -->
|
||||
<svg width="1484pt" height="1277pt"
|
||||
viewBox="0.00 0.00 1484.00 1277.20" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
|
||||
<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 1273.1977)">
|
||||
<title>Pipeline:</title>
|
||||
<polygon fill="#ffffff" stroke="transparent" points="-4,4 -4,-1273.1977 1480,-1273.1977 1480,4 -4,4"/>
|
||||
<g id="clust1" class="cluster">
|
||||
<title>clustertasks</title>
|
||||
<polygon fill="none" stroke="#000000" points="8,-8 8,-1261.1977 1468,-1261.1977 1468,-8 8,-8"/>
|
||||
<text text-anchor="middle" x="738" y="-1233.1977" font-family="Times,serif" font-size="30.00" fill="#ff3232">Pipeline:</text>
|
||||
</g>
|
||||
<!-- t0 -->
|
||||
<g id="node1" class="node">
|
||||
<title>t0</title>
|
||||
<polygon fill="#efa03b" stroke="#000000" points="1215.7053,-1215.1977 1006.2947,-1215.1977 1002.2947,-1211.1977 1002.2947,-1179.1977 1211.7053,-1179.1977 1215.7053,-1183.1977 1215.7053,-1215.1977"/>
|
||||
<polyline fill="none" stroke="#000000" points="1211.7053,-1211.1977 1002.2947,-1211.1977 "/>
|
||||
<polyline fill="none" stroke="#000000" points="1211.7053,-1211.1977 1211.7053,-1179.1977 "/>
|
||||
<polyline fill="none" stroke="#000000" points="1211.7053,-1211.1977 1215.7053,-1215.1977 "/>
|
||||
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<title>t1</title>
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<title>t16</title>
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<title>t18</title>
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<title>t3</title>
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</g>
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<title>t4</title>
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<title>t3->t4</title>
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<title>t5</title>
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<title>t4->t5</title>
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<title>t6</title>
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<g id="edge7" class="edge">
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<title>t5->t6</title>
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<title>t13</title>
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<title>t5->t13</title>
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<title>t7</title>
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<title>t6->t7</title>
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<title>t6->t12</title>
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<title>t8</title>
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<title>t7->t8</title>
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<title>t7->t12</title>
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<title>t8->t9</title>
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<title>t8->t12</title>
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|
Before Width: | Height: | Size: 25 KiB |
@@ -1,165 +0,0 @@
|
||||
=======
|
||||
Plugins
|
||||
=======
|
||||
|
||||
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL
|
||||
NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and
|
||||
"OPTIONAL" in this document are to be interpreted as described in
|
||||
RFC 2119.
|
||||
|
||||
You can use plugins to customize the behavior of OCRmyPDF at certain points of
|
||||
interest.
|
||||
|
||||
Currently, it is possible to:
|
||||
|
||||
- add new command line arguments
|
||||
- override the decision for whether or not to perform OCR on a particular file
|
||||
- modify the image is about to be sent for OCR
|
||||
- modify the page image before it is converted to PDF
|
||||
- replace the Tesseract OCR with another OCR engine that has similar behavior
|
||||
- replace Ghostscript with another PDF to image converter (rasterizer) or
|
||||
PDF/A generator
|
||||
|
||||
OCRmyPDF plugins are based on the Python ``pluggy`` package and conform to its
|
||||
conventions. Note that: plugins installed with as setuptools entrypoints are
|
||||
not checked currently, because OCRmyPDF assumes you may not want to enable
|
||||
plugins for all files.
|
||||
|
||||
Script plugins
|
||||
==============
|
||||
|
||||
Script plugins may be called from the command line, by specifying the name of a file.
|
||||
Script plugins may be convenient for informal or "one-off" plugins, when a certain
|
||||
batch of files needs a special processing step for example.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
ocrmypdf --plugin ocrmypdf_example_plugin.py input.pdf output.pdf
|
||||
|
||||
Multiple plugins may be installed by issuing the ``--plugin`` argument multiple times.
|
||||
|
||||
Packaged plugins
|
||||
================
|
||||
|
||||
Installed plugins may be installed into the same virtual environment as OCRmyPDF
|
||||
is installed into. They may be invoked using Python standard module naming.
|
||||
If you are intending to distribute a plugin, please package it.
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
ocrmypdf --plugin ocrmypdf_fancypants.pockets.contents input.pdf output.pdf
|
||||
|
||||
OCRmyPDF does not automatically import plugins, because the assumption is that
|
||||
plugins affect different files differently and you may not want them activated
|
||||
all the time. The command line or ``ocrmypdf.ocr(plugin='...')`` must call
|
||||
for them.
|
||||
|
||||
Third parties that wish to distribute packages for ocrmypdf should package them
|
||||
as packaged plugins, and these modules should begin with the name ``ocrmypdf_``
|
||||
similar to ``pytest`` packages such as ``pytest-cov`` (the package) and
|
||||
``pytest_cov`` (the module).
|
||||
|
||||
.. note::
|
||||
|
||||
We strongly recommend plugin authors name their plugins with the prefix
|
||||
``ocrmypdf-`` (for the package name on PyPI) and ``ocrmypdf_`` (for the
|
||||
module), just like pytest plugins.
|
||||
|
||||
Plugin requirements
|
||||
===================
|
||||
|
||||
OCRmyPDF generally uses multiple worker processes. When a new worker is started,
|
||||
Python will import all plugins again, including all plugins that were imported earlier.
|
||||
This means that the global state of a plugin in one worker will not be shared with
|
||||
other workers. As such, plugin hook implementations should be stateless, relying
|
||||
only on their inputs. Hook implementations may use their input parameters to
|
||||
to obtain a reference to shared state prepared by another hook implementation.
|
||||
Plugins must expect that other instances of the plugin will be running
|
||||
simultaneously.
|
||||
|
||||
The ``context`` object that is passed to many hooks can be used to share information
|
||||
about a file being worked on. Plugins must write private, plugin-specific data to
|
||||
a subfolder named ``{options.work_folder}/ocrmypdf-plugin-name``. Plugins MAY
|
||||
read and write files in ``options.work_folder``, but should be aware that their
|
||||
semantics are subject to change.
|
||||
|
||||
OCRmyPDF will delete ``options.work_folder`` when it has finished OCRing
|
||||
a file, unless invoked with ``--keep-temporary-files``.
|
||||
|
||||
The documentation for some plugin hooks contain a detailed description of the
|
||||
execution context in which they will be called.
|
||||
|
||||
Plugins should be prepared to work whether executed in worker threads or worker
|
||||
processes. Generally, OCRmyPDF uses processes, but has a semi-hidden threaded
|
||||
argument that simplifies debugging.
|
||||
|
||||
|
||||
Plugin hooks
|
||||
============
|
||||
|
||||
A plugin may provide the following hooks. Hooks must be decorated with
|
||||
``ocrmypdf.hookimpl``, for example:
|
||||
|
||||
.. code-block:: python
|
||||
|
||||
from ocrmpydf import hookimpl
|
||||
|
||||
@hookimpl
|
||||
def add_options(parser):
|
||||
pass
|
||||
|
||||
The following is a complete list of hooks that are available, and when
|
||||
they are called.
|
||||
|
||||
.. _firstresult:
|
||||
|
||||
**Note on firstresult hooks**
|
||||
|
||||
If multiple plugins install implementations for this hook, they will be called in
|
||||
the reverse of the order in which they are installed (i.e., last plugin wins).
|
||||
When each hook implementation is called in order, the first implementation that
|
||||
returns a value other than ``None`` will "win" and prevent execution of all other
|
||||
hooks. As such, you cannot "chain" a series of plugin filters together in this
|
||||
way. Instead, a single hook implementation should be responsible for any such
|
||||
chaining operations.
|
||||
|
||||
Custom command line arguments
|
||||
-----------------------------
|
||||
|
||||
.. autofunction:: ocrmypdf.pluginspec.add_options
|
||||
|
||||
.. autofunction:: ocrmypdf.pluginspec.check_options
|
||||
|
||||
Applying special behavior before processing
|
||||
-------------------------------------------
|
||||
|
||||
.. autofunction:: ocrmypdf.pluginspec.validate
|
||||
|
||||
PDF page to image
|
||||
-----------------
|
||||
|
||||
.. autofunction:: ocrmypdf.pluginspec.rasterize_pdf_page
|
||||
|
||||
Modifying intermediate images
|
||||
-----------------------------
|
||||
|
||||
.. autofunction:: ocrmypdf.pluginspec.filter_ocr_image
|
||||
|
||||
.. autofunction:: ocrmypdf.pluginspec.filter_page_image
|
||||
|
||||
OCR engine
|
||||
----------
|
||||
|
||||
.. autofunction:: ocrmypdf.pluginspec.get_ocr_engine
|
||||
|
||||
.. autoclass:: ocrmypdf.pluginspec.OcrEngine
|
||||
:members:
|
||||
|
||||
.. automethod:: __str__
|
||||
|
||||
.. autoclass:: ocrmypdf.pluginspec.OrientationConfidence
|
||||
|
||||
PDF/A production
|
||||
----------------
|
||||
|
||||
.. autofunction:: ocrmypdf.pluginspec.generate_pdfa
|
||||
File diff suppressed because it is too large
Load Diff
+502
@@ -0,0 +1,502 @@
|
||||
GNU LESSER GENERAL PUBLIC LICENSE
|
||||
Version 2.1, February 1999
|
||||
|
||||
Copyright (C) 1991, 1999 Free Software Foundation, Inc.
|
||||
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||||
|
||||
15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
|
||||
WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
|
||||
EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
|
||||
OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
|
||||
KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||||
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
|
||||
LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
|
||||
THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
|
||||
|
||||
16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
|
||||
WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
|
||||
AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
|
||||
FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
|
||||
CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
|
||||
LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
|
||||
RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
|
||||
FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
|
||||
SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
|
||||
DAMAGES.
|
||||
|
||||
END OF TERMS AND CONDITIONS
|
||||
|
||||
How to Apply These Terms to Your New Libraries
|
||||
|
||||
If you develop a new library, and you want it to be of the greatest
|
||||
possible use to the public, we recommend making it free software that
|
||||
everyone can redistribute and change. You can do so by permitting
|
||||
redistribution under these terms (or, alternatively, under the terms of the
|
||||
ordinary General Public License).
|
||||
|
||||
To apply these terms, attach the following notices to the library. It is
|
||||
safest to attach them to the start of each source file to most effectively
|
||||
convey the exclusion of warranty; and each file should have at least the
|
||||
"copyright" line and a pointer to where the full notice is found.
|
||||
|
||||
<one line to give the library's name and a brief idea of what it does.>
|
||||
Copyright (C) <year> <name of author>
|
||||
|
||||
This library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
This library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public
|
||||
License along with this library; if not, write to the Free Software
|
||||
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
Also add information on how to contact you by electronic and paper mail.
|
||||
|
||||
You should also get your employer (if you work as a programmer) or your
|
||||
school, if any, to sign a "copyright disclaimer" for the library, if
|
||||
necessary. Here is a sample; alter the names:
|
||||
|
||||
Yoyodyne, Inc., hereby disclaims all copyright interest in the
|
||||
library `Frob' (a library for tweaking knobs) written by James Random Hacker.
|
||||
|
||||
<signature of Ty Coon>, 1 April 1990
|
||||
Ty Coon, President of Vice
|
||||
|
||||
That's all there is to it!
|
||||
@@ -0,0 +1,17 @@
|
||||
JHOVE - JSTOR/Harvard Object Validation Environment
|
||||
Copyright 2003-2008 by JSTOR and the President and Fellows of Harvard College
|
||||
|
||||
This program is free software; you can redistribute it and/or modify
|
||||
it under the terms of the GNU Lessor General Public License as
|
||||
published by the Free Software Foundation; either version 2.1 of the
|
||||
License, or (at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful, but
|
||||
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public
|
||||
License along with this program; if not, write to the Free Software
|
||||
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
|
||||
USA
|
||||
+227
@@ -0,0 +1,227 @@
|
||||
JHOVE - JSTOR/Harvard Object Validation Environment
|
||||
Copyright 2003-2012 by JSTOR and the President and Fellows of Harvard College
|
||||
JHOVE is made available under the GNU Lesser General Public License (LGPL;
|
||||
see the file LICENSE for details)
|
||||
|
||||
Rev. 1.9, 2012-12-17
|
||||
|
||||
JHOVE (the JSTOR/Harvard Object Validation Environment, pronounced "jhove")
|
||||
is an extensible software framework for performing format identification,
|
||||
validation, and characterization of digital objects.
|
||||
|
||||
o Format identification is the process of determining the format to which a
|
||||
digital object conforms: "I have a digital object; what format is it?"
|
||||
o Format validation is the process of determining the level of compliance of a
|
||||
digital object to the specification for its purported format: "I have an
|
||||
object purportedly of format F; is it?"
|
||||
o Format characterization is the process of determing the format-specific
|
||||
significant properties of an object of a given format: "I have an object of
|
||||
format F; what are its salient properties?"
|
||||
|
||||
These actions are frequently necessary during routine operation of digital
|
||||
repositories and for digital preservation activities.
|
||||
|
||||
The output from JHOVE is controlled by output handlers. JHOVE uses an
|
||||
extensible plug-in architecture; it can be configured at the time of its
|
||||
invocation to include whatever specific format modules and output handlers
|
||||
that are desired. The initial release of JHOVE includes modules for
|
||||
arbitrary byte streams, ASCII and UTF-8 encoded text, AIFF and WAVE audio,
|
||||
GIF, JPEG, JPEG 2000, TIFF, and PDF; and text and XML output handlers.
|
||||
|
||||
The JHOVE project is a collaboration of JSTOR and the Harvard University
|
||||
Library. Development of JHOVE was funded in part by the Andrew W. Mellon
|
||||
Foundation. JHOVE is made available under the GNU Lesser General Public
|
||||
License (LGPL; see the file LICENSE for details).
|
||||
|
||||
JHOVE is currently being maintained by indpendent developers.
|
||||
|
||||
REQUIREMENTS
|
||||
|
||||
1. Java J2SE 1.5
|
||||
(JHOVE was originally implemented using the Sun J2SE SDK 1.4.1 and has
|
||||
been tested to work with 1.5)
|
||||
|
||||
2. If you would like to compile the JHOVE source code, then
|
||||
Apache Ant, a Java-based build tool <http://ant.apache.org/> is necessary.
|
||||
Note that the JAVA_HOME environment variable must be set appropriately for
|
||||
Ant to work properly.
|
||||
(JHOVE was implemented and tested using Ant 1.5.1.)
|
||||
|
||||
DISTRIBUTION
|
||||
|
||||
The JHOVE distribution package includes:
|
||||
|
||||
jhove/ # JHOVE home directory
|
||||
COPYING # GNU Lesser General Public License
|
||||
LICENSE # JHOVE license information
|
||||
README
|
||||
RELEASENOTES # JHOVE release notes
|
||||
bin/
|
||||
jhove.jar # JHOVE API package
|
||||
jhove-handler.jar # Standard output handler package
|
||||
jhove-module.jar # Standard module package
|
||||
JhoveApp.jar # JHOVE command line application
|
||||
JhoveView.jar # JHOVE with Swing GUI front-end
|
||||
build.xml # Ant configuration file
|
||||
classes/
|
||||
build.xml # Ant configuration file
|
||||
edu/ ... # JHOVE API packages
|
||||
ADump.* # AIFF dump utility class
|
||||
GDump.* # GIF dump utility class
|
||||
Jhove.* # JHOVE main class
|
||||
JDump.* # JPEG dump utility class
|
||||
J2Dump.* # JPEG 2000 dump utility class
|
||||
PDump.* # PDF dump utility class
|
||||
TDump.* # TIFF dump utility class
|
||||
UserHome.* # user.home property utility class
|
||||
WDump.* # WAVE dump utility class
|
||||
conf/
|
||||
jhove.conf # JHOVE configuration file
|
||||
jhove.xsd # JHOVE output schema
|
||||
jhoveConfig.xsd # JHOVE configuration file schema
|
||||
doc/
|
||||
*.html # API documentation
|
||||
...
|
||||
examples/ # Sample files
|
||||
ascii/ ...
|
||||
gif/ ...
|
||||
jpeg/ ...
|
||||
jpeg2000/ ...
|
||||
pdf/ ...
|
||||
tiff/ ...
|
||||
utf-8/ ...
|
||||
adump* # AIFF dump Bourne shell driver
|
||||
adump.bat* # AIFF dump DOS shell driver script
|
||||
gdump* # GIF dump Bourne shell driver
|
||||
gdump.bat* # GIF dump DOS shell driver script
|
||||
jdump* # JPEG dump Bourne shell driver
|
||||
jdump.bat* # JPEG dump DOS shell driver script
|
||||
j2dump* # JPEG 2000 dump Bourne shell driver
|
||||
j2dump.bat* # JPEG 2000 dump DOS shell driver
|
||||
jhove.tmpl* # Template for JHOVE Bourne shell driver script
|
||||
jhove_bat.tmpl* # Template for JHOVE DOS shell driver script
|
||||
pdump* # PDF dump Bourne shell driver
|
||||
pdump.bat* # PDF dump DOS shell driver script
|
||||
tdump* # TIFF dump Bourne shell driver
|
||||
tdump.bat* # TIFF dump DOS shell driver script
|
||||
userhome* # user.home Bourne shell driver
|
||||
userhome.bat* # user.home DOS shell driver script
|
||||
wdump* # WAVE dump Bourne shell driver
|
||||
wdump.bat* # WAVE dump DOS shell driver script
|
||||
|
||||
INSTALLATION
|
||||
|
||||
Edit the configuration file, jhove/conf/jhove.conf, and set the absolute
|
||||
pathname of the JHOVE home directory and the temporary directory (in which
|
||||
temporary files are created):
|
||||
|
||||
<jhoveHome>jhove-home-directory</jhoveHome>
|
||||
<tempDirectory>temporary-directory</tempDirectory>
|
||||
|
||||
The JHOVE home directory is the top-most directory in the distribution TAR
|
||||
or ZIP file. On Unix systems, "/var/tmp" is an appropriate temporary
|
||||
directory; on Windows, "C:\Temp". For example, if the distribution TAR
|
||||
file is disaggregated on a Unix system in the directory "/users/stephen/
|
||||
projects", then the configuration file should read:
|
||||
|
||||
<jhoveHome>/users/stephen/projects/jhove</jhoveHome>
|
||||
<tempDirectory>/var/tmp</jhoveHome>
|
||||
|
||||
In the JHOVE home directory, copy the JHOVE Bourne shell driver script
|
||||
template, "jhove.tmpl", to "jhove" (or the equivalent Windows shell
|
||||
script, "jhove_bat.tmpl" to "jhove.bat"), and set the
|
||||
JHOVE home directory, Java home directory, and Java interpreter:
|
||||
|
||||
JHOVE_HOME=jhove-home-directory
|
||||
JAVA_HOME=java-home-directory
|
||||
JAVA=java-interpreter
|
||||
|
||||
The JAVA_HOME property should provide the absolute pathname of the Java
|
||||
runtime or SDK installation; JAVA should provide the absolute pathname of the
|
||||
Java interpreter. For example:
|
||||
|
||||
JHOVE_HOME=/users/stephen/projects/jhove
|
||||
JAVA_HOME=/usr/local/j2re1.4.1_02
|
||||
JAVA=$JAVA_HOME/bin/java
|
||||
|
||||
In the DOS shell driver script, jhove.bat, the equivalent three
|
||||
variables are:
|
||||
|
||||
SET JHOVE_HOME=jhove-home-directory
|
||||
SET JAVA_HOME=java-home-directory
|
||||
SET JAVA=%JAVA_HOME%\bin\java
|
||||
|
||||
For example:
|
||||
|
||||
SET JHOVE_HOME="C:\Program Files\jhove"
|
||||
SET JAVA_HOME="C:\Program Files\java\j2re1.4.1_02"
|
||||
SET JAVA=%JAVA_HOME%\bin\java
|
||||
|
||||
The quotation marks are necessary because of the embedded space characters.
|
||||
On Windows platforms it may also be necessary to add the Java bin subdirectory
|
||||
to the System PATH environment variable:
|
||||
|
||||
PATH=C:\Program Files\java\j2re1.4.1_02\bin;...
|
||||
|
||||
(For information on setting a Windows environment variable, consult your local
|
||||
documentation or system administrator.)
|
||||
|
||||
USAGE
|
||||
|
||||
java Jhove [-c config] [-m module] [-h handler] [-e encoding] [-H handler]
|
||||
[-o output] [-x saxclass] [-t tempdir] [-b bufsize]
|
||||
[-l loglevel] [[-krs] dir-file-or-uri [...]]
|
||||
|
||||
where -c config Configuration file pathname
|
||||
-m module Module name
|
||||
-h handler Output handler name (defaults to TEXT)
|
||||
-e encoding Character encoding used by output handler (defaults to UTF-8)
|
||||
-H handler About handler name
|
||||
-o output Output file pathname (defaults to standard output)
|
||||
-x saxclass SAX parser class (defaults to J2SE default)
|
||||
-t tempdir Temporary directory in which to create temporary files
|
||||
-b bufsize Buffer size for buffered I/O (defaults to J2SE 1.4 default)
|
||||
-l loglevel Logging level
|
||||
-k Calculate CRC32, MD5, and SHA-1 checksums
|
||||
-r Display raw data flags, not textual equivalents
|
||||
-s Format identification based on internal signatures only
|
||||
dir-file-or-uri Directory or file pathname or URI of formated content
|
||||
stream
|
||||
|
||||
All named modules and output handlers must be found on the Java CLASSPATH at
|
||||
the time of invocation. The JHOVE driver script, jhove/jhove, automatically
|
||||
sets the CLASSPATH and invokes the Jhove main class:
|
||||
|
||||
jhove [-c config] [-m module] [-h handler] [-e encoding] [-H handler]
|
||||
[-o output] [-x saxclass] [-t tempdir] [-b bufsize] [-l loglevel]
|
||||
[[-krs] dir-file-or-uri [...]]
|
||||
|
||||
The following additional programs are available, primarily for testing
|
||||
and debugging purposes. They display a minimally processed, human-readable
|
||||
version of the contents of AIFF, GIF, JPEG, JPEG 2000, PDF, TIFF, and WAVE
|
||||
files:
|
||||
|
||||
java ADump aiff-file
|
||||
java GDump gif-file
|
||||
java JDump jpeg-file
|
||||
java J2Dump jpeg2000-file
|
||||
java PDump pdf-file
|
||||
java TDump tiff-file
|
||||
java WDump wave-file
|
||||
|
||||
For convenience, the following driver scripts are also available:
|
||||
|
||||
adump aiff-file
|
||||
gdump gif-file
|
||||
jdump jpeg-file
|
||||
j2dump jpeg2000-file
|
||||
pdump pdf-file
|
||||
tdump tiff-file
|
||||
wdump wave-file
|
||||
|
||||
The JHOVE Swing-based GUI interface can be invoked from a command shell from
|
||||
the jhove/bin sub-directory:
|
||||
|
||||
java -jar JhoveView.jar -c <configFile>
|
||||
|
||||
where <configFile> is the pathname of the JHOVE configuration file.
|
||||
+1676
File diff suppressed because it is too large
Load Diff
Binary file not shown.
Binary file not shown.
@@ -0,0 +1,25 @@
|
||||
JHOVE - JSTOR/Harvard Object Validation Environment
|
||||
Copyright 2003 by JSTOR and the President and Fellows of Harvard College
|
||||
JHOVE is made available under the GNU General Public License (see the file
|
||||
LICENSE for details)
|
||||
|
||||
Rev. 2003-11-25
|
||||
|
||||
The following jar files are meant to be used for embedding JHOVE functionality
|
||||
into new applications or systems.
|
||||
|
||||
jhove.jar Contains the JHOVE API interfaces and classes
|
||||
jhove-module.jar Contains the standard JHOVE modules ()
|
||||
jhove-handler.jar Contains the standard JHOVE output handlers (TEXT and XML)
|
||||
|
||||
The following jar file is meant to be used with the stand-alone JHOVE
|
||||
application using a command-line interface. It contains the main Jhove class
|
||||
and the contents of jhove.jar, jhove-module.jar, and jhove-handler.jar.
|
||||
|
||||
JhoveApp.jar
|
||||
|
||||
The following jar file is meant to be used with the stand-alone JHOVE
|
||||
application using a Swing GUI interface. It contains the main JhoveView class
|
||||
and the contents of jhove.jar, jhove-module.jar, and jhove-handler.jar.
|
||||
|
||||
JhoveView.jar
|
||||
Binary file not shown.
Binary file not shown.
Binary file not shown.
@@ -0,0 +1,78 @@
|
||||
<project name="Jhove" default="dist" basedir=".">
|
||||
<description>Project build file
|
||||
Jhove - JSTOR/Harvard Object Validation Environment
|
||||
Version 1.0 2004-09-10
|
||||
Copyright 2004 by JSTOR and the President and Fellows of Harvard College
|
||||
</description>
|
||||
|
||||
<!-- ant (or ant dist) Build everything
|
||||
ant debug Build everything with debug enabled
|
||||
ant clean Delete backup files
|
||||
ant cleanclass Delete backup and class files
|
||||
ant cleandist Delete backup, class, and jar files
|
||||
ant javadoc Build javadocs
|
||||
-->
|
||||
|
||||
<!-- set global properties for this build -->
|
||||
<property name="bin" location="bin"/>
|
||||
<property name="classes" location="classes"/>
|
||||
<property name="doc" location="doc"/>
|
||||
|
||||
<target name="dist" description="Create distribution">
|
||||
<ant dir="${classes}" inheritAll="false">
|
||||
<property name="dbg" value="off"/>
|
||||
</ant>
|
||||
<chmod file="jhove" perm="ugo+x"/>
|
||||
<chmod file="${bin}/JhoveView.jar" perm="ugo+x"/>
|
||||
</target>
|
||||
|
||||
<target name="debug" description="Create distribution with debug enabled">
|
||||
<ant dir="${classes}" inheritAll="false">
|
||||
<property name="dbg" value="on"/>
|
||||
</ant>
|
||||
</target>
|
||||
|
||||
<target name="view" description="Create JhoveView application">
|
||||
<ant dir="${classes}" target="view" inheritAll="false">
|
||||
<property name="dbs" value="on"/>
|
||||
</ant>
|
||||
</target>
|
||||
|
||||
<target name="clean" description="Delete backup files">
|
||||
<ant dir="${classes}" target="main-clean" inheritAll="false"/>
|
||||
</target>
|
||||
|
||||
<target name="cleanclass" depends="clean">
|
||||
<ant dir="${classes}" target="main-cleanclass" inheritAll="false"/>
|
||||
</target>
|
||||
|
||||
<target name="cleandist" depends="cleanclass">
|
||||
<delete file="${bin}/jhove.jar"/>
|
||||
<delete file="${bin}/jhove-handler.jar"/>
|
||||
<delete file="${bin}/jhove-module.jar"/>
|
||||
<delete file="${bin}/JhoveApp.jar"/>
|
||||
<delete file="${bin}/JhoveView.jar"/>
|
||||
</target>
|
||||
|
||||
<target name="javadoc">
|
||||
<javadoc sourcepath="${classes}" destdir="${doc}"
|
||||
windowtitle="JHOVE Documentation"
|
||||
Overview="${classes}/overview.html">
|
||||
<package name="edu.harvard.hul.ois.jhove"/>
|
||||
<package name="edu.harvard.hul.ois.jhove.handler"/>
|
||||
<package name="edu.harvard.hul.ois.jhove.handler.audit"/>
|
||||
<package name="edu.harvard.hul.ois.jhove.module"/>
|
||||
<package name="edu.harvard.hul.ois.jhove.module.aiff"/>
|
||||
<package name="edu.harvard.hul.ois.jhove.module.gif"/>
|
||||
<package name="edu.harvard.hul.ois.jhove.module.html"/>
|
||||
<package name="edu.harvard.hul.ois.jhove.module.iff"/>
|
||||
<package name="edu.harvard.hul.ois.jhove.module.jpeg"/>
|
||||
<package name="edu.harvard.hul.ois.jhove.module.jpeg2000"/>
|
||||
<package name="edu.harvard.hul.ois.jhove.module.pdf"/>
|
||||
<package name="edu.harvard.hul.ois.jhove.module.tiff"/>
|
||||
<package name="edu.harvard.hul.ois.jhove.module.wave"/>
|
||||
<package name="edu.harvard.hul.ois.jhove.module.xml"/>
|
||||
<package name="edu.harvard.hul.ois.jhove.viewer"/>
|
||||
</javadoc>
|
||||
</target>
|
||||
</project>
|
||||
@@ -0,0 +1,63 @@
|
||||
JHOVE - JSTOR/Harvard Object Validation Environment
|
||||
Copyright 2003-2007 by JSTOR and the President and Fellows of Harvard College
|
||||
JHOVE is made available under the GNU General Public License (see the file
|
||||
LICENSE for details)
|
||||
|
||||
Rev. 2007-08-30
|
||||
|
||||
Edit the configuration file, jhove.conf, and set the JHOVE home
|
||||
directory:
|
||||
|
||||
<jhoveHome>jhove-home-directory</jhoveHome>
|
||||
|
||||
and temporary directory:
|
||||
|
||||
<tempDirectory>temporary-directory</tempDirectory>
|
||||
|
||||
On most Unix systems, a reasonable temporary directory is "/var/tmp";
|
||||
on Windows, "C:\temp".
|
||||
|
||||
The optional
|
||||
|
||||
<bufferSize>buffer-size</bufferSize>
|
||||
|
||||
element defines the buffer size used for buffer I/O operations.
|
||||
|
||||
The optional
|
||||
|
||||
<mixVersion>1.0</mixVersion>
|
||||
|
||||
element specifies that the XML output handler should conform to the
|
||||
MIX 1.0 schema. The default behavior is for handler output to conform
|
||||
to the MIX 0.2 schema.
|
||||
|
||||
The optional
|
||||
|
||||
<sigBytes>n</sigBytes>
|
||||
|
||||
element specifies that JHOVE modules will look for format signatures
|
||||
in the first <n> bytes of the file. The default value is 1024.
|
||||
|
||||
All class names must be fully qualified with their package name:
|
||||
|
||||
<module>
|
||||
<class>fully-package-qualified-class-name</class>
|
||||
<init>optional-initialization-argument</init>
|
||||
<param>optional-invocation-argument</param>
|
||||
</module>
|
||||
|
||||
The optional <init> argument is passed to the module once at the time
|
||||
its class is instantiated. See module-specific documentation for a
|
||||
description of any initialization options.
|
||||
|
||||
The optional <param> argument is passed to the module every time it is
|
||||
invoked. See module-specific documentation for a description of any
|
||||
invocation options.
|
||||
|
||||
The order in which format modules are defined is important; when
|
||||
performing a format identification operation, JHOVE will search for a
|
||||
matching module in the order in which the modules are defined in the
|
||||
configuration file. In general, the modules for more generic formats
|
||||
should come later in the list. For example, the standard module ASCII
|
||||
should be defined before the UTF-8 module, since all ASCII objects
|
||||
are, by definition, UTF-8 objects, but not vice versa.
|
||||
@@ -0,0 +1,47 @@
|
||||
<?xml version="1.0" encoding="UTF-8"?>
|
||||
<jhoveConfig version="1.0"
|
||||
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
||||
xmlns="http://hul.harvard.edu/ois/xml/ns/jhove/jhoveConfig"
|
||||
xsi:schemaLocation="http://hul.harvard.edu/ois/xml/ns/jhove/jhoveConfig
|
||||
http://hul.harvard.edu/ois/xml/xsd/jhove/1.4/jhoveConfig.xsd">
|
||||
<jhoveHome>/users/stephen/projects/jhove</jhoveHome>
|
||||
<defaultEncoding>utf-8</defaultEncoding>
|
||||
<tempDirectory>/var/tmp</tempDirectory>
|
||||
<bufferSize>131072</bufferSize>
|
||||
<mixVersion>1.0</mixVersion>
|
||||
<sigBytes>1024</sigBytes>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.AiffModule</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.WaveModule</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.PdfModule</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.Jpeg2000Module</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.JpegModule</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.GifModule</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.TiffModule</class>
|
||||
<param>byteoffset=true</param>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.XmlModule</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.HtmlModule</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.AsciiModule</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.Utf8Module</class>
|
||||
</module>
|
||||
</jhoveConfig>
|
||||
@@ -0,0 +1,51 @@
|
||||
<?xml version="1.0" encoding="UTF-8"?>
|
||||
<jhoveConfig version="1.0"
|
||||
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
||||
xmlns="http://hul.harvard.edu/ois/xml/ns/jhove/jhoveConfig"
|
||||
xsi:schemaLocation="http://hul.harvard.edu/ois/xml/ns/jhove/jhoveConfig
|
||||
http://hul.harvard.edu/ois/xml/xsd/jhove/1.4/jhoveConfig.xsd">
|
||||
<jhoveHome>/users/stephen/projects/jhove</jhoveHome>
|
||||
<defaultEncoding>utf-8</defaultEncoding>
|
||||
<tempDirectory>/var/tmp</tempDirectory>
|
||||
<bufferSize>131072</bufferSize>
|
||||
<mixVersion>1.0</mixVersion>
|
||||
<sigBytes>1024</sigBytes>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.AiffModule</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.WaveModule</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.PdfModule</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.Jpeg2000Module</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.JpegModule</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.GifModule</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.TiffModule</class>
|
||||
<param>byteoffset=true</param>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.XmlModule</class>
|
||||
<param>withTextMD=true</param>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.HtmlModule</class>
|
||||
<param>withTextMD=true</param>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.AsciiModule</class>
|
||||
<param>withTextMD=true</param>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.Utf8Module</class>
|
||||
<param>withTextMD=true</param>
|
||||
</module>
|
||||
</jhoveConfig>
|
||||
@@ -0,0 +1,45 @@
|
||||
<?xml version="1.0" encoding="UTF-8"?>
|
||||
<jhoveConfig version="1.0"
|
||||
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
||||
xmlns="http://hul.harvard.edu/ois/xml/ns/jhove/jhoveConfig"
|
||||
xsi:schemaLocation="http://hul.harvard.edu/ois/xml/ns/jhove/jhoveConfig
|
||||
http://hul.harvard.edu/ois/xml/xsd/jhove/1.4/jhoveConfig.xsd">
|
||||
<jhoveHome>./jhove/</jhoveHome>
|
||||
<defaultEncoding>utf-8</defaultEncoding>
|
||||
<tempDirectory>/var/tmp</tempDirectory>
|
||||
<bufferSize>131072</bufferSize>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.AiffModule</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.WaveModule</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.PdfModule</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.Jpeg2000Module</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.JpegModule</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.GifModule</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.TiffModule</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.XmlModule</class>
|
||||
<param>schema=http://www.example.com/schema;/home/schemas/exampleschema.xsd</param>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.HtmlModule</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.AsciiModule</class>
|
||||
</module>
|
||||
<module>
|
||||
<class>edu.harvard.hul.ois.jhove.module.Utf8Module</class>
|
||||
</module>
|
||||
</jhoveConfig>
|
||||
@@ -0,0 +1,88 @@
|
||||
#!/usr/bin/perl
|
||||
|
||||
########################################################################
|
||||
# Jhove - JSTOR/Harvard Object Validation Environment
|
||||
# Copyright 2004 by JSTOR and the President and Fellows of Harvard College
|
||||
#
|
||||
# A Perl script for plugging local path information into the
|
||||
# various script files of JHOVE, as well as conf/jhove.conf.
|
||||
#
|
||||
# This is configured only for Unix (including OS X).
|
||||
#
|
||||
# Usage: configure.pl jhove_home_directory [java_home_directory [java_runtime_directory]]
|
||||
#
|
||||
# If invoked with no arguments, it will output a usage message.
|
||||
#
|
||||
########################################################################
|
||||
use File::Copy;
|
||||
|
||||
sub mung {
|
||||
my $f = $_[0];
|
||||
my $bak = $f . "~";
|
||||
#If there is no backup file, copy the file to the
|
||||
#backup. Otherwise work from the backup.
|
||||
if (!(-e $bak)) {
|
||||
rename ($f, $bak);
|
||||
}
|
||||
open (INFILE, $bak);
|
||||
open (OUTFILE, ">" . $f);
|
||||
|
||||
#Walks through each line of file, making substitutions.
|
||||
#Remember that the JAVA_HOME and JAVA arguments are optional.
|
||||
while (<INFILE>) {
|
||||
s/^JHOVE_HOME=.*/JHOVE_HOME=$ARGV[0]/;
|
||||
if ($narg >= 2) {
|
||||
s/^JAVA_HOME=.*/JAVA_HOME=$ARGV[1]/;
|
||||
}
|
||||
if ($narg >= 3) {
|
||||
s/^JAVA=.*/JAVA=$ARGV[2]/;
|
||||
}
|
||||
print OUTFILE;
|
||||
}
|
||||
close (INFILE);
|
||||
close (OUTFILE);
|
||||
if (-e $f) {
|
||||
print ("Fixed " . $f . "\n");
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
$narg = $#ARGV + 1;
|
||||
if ($narg <= 0) {
|
||||
print "Usage: configure.pl jhove_home_directory [java_home_directory [java_runtime_directory]]\n";
|
||||
exit;
|
||||
}
|
||||
print "JHOVE_HOME will be set to " . $ARGV[0] . "\n";
|
||||
if ($narg >= 2) {
|
||||
print "JAVA_HOME will be set to " . $ARGV[1] . "\n";
|
||||
}
|
||||
if ($narg >= 3) {
|
||||
print "JAVA will be set to " . $ARGV[2] . "\n";
|
||||
}
|
||||
mung ("jhove");
|
||||
mung ("adump");
|
||||
mung ("gdump");
|
||||
mung ("jdump");
|
||||
mung ("j2dump");
|
||||
mung ("pdump");
|
||||
mung ("tdump");
|
||||
mung ("wdump");
|
||||
|
||||
#Fix up the config file. We assume that the <jhoveHome>
|
||||
#element is all on one line.
|
||||
if (!(-e "conf/jhove.conf~")) {
|
||||
rename ("conf/jhove.conf", "conf/jhove.conf~");
|
||||
}
|
||||
open (INFILE, "conf/jhove.conf~");
|
||||
open (OUTFILE, ">conf/jhove.conf");
|
||||
while (<INFILE>) {
|
||||
s!<jhoveHome>.*</jhoveHome>!<jhoveHome>$ARGV[0]</jhoveHome>!;
|
||||
print OUTFILE;
|
||||
}
|
||||
close (INFILE);
|
||||
close (OUTFILE);
|
||||
if (-e "conf/jhove.conf") {
|
||||
print "Fixed conf/jhove.conf\n";
|
||||
}
|
||||
exit;
|
||||
|
||||
+37
@@ -0,0 +1,37 @@
|
||||
#!/bin/sh
|
||||
|
||||
########################################################################
|
||||
# gdump - JSTOR/Harvard Object Validation Environment
|
||||
# Copyright 2004-2005 by the President and Fellows of Harvard College
|
||||
# JHOVE is made available under the GNU General Public License (see the
|
||||
# file LICENSE for details)
|
||||
#
|
||||
# Driver script for the GIF dump utility
|
||||
#
|
||||
# Usage: gdump file
|
||||
#
|
||||
# where file is a GIF file
|
||||
#
|
||||
# Configuration constants:
|
||||
|
||||
JHOVE_HOME=/users/stephen/projects/jhove
|
||||
|
||||
JAVA_HOME=/usr/java # Java JRE directory
|
||||
JAVA=$JAVA_HOME/bin/java # Java interpreter
|
||||
|
||||
EXTRA_JARS= # Extra .jar files to add to CLASSPATH
|
||||
|
||||
# NOTE: Nothing below this line should be edited
|
||||
########################################################################
|
||||
|
||||
CP=${JHOVE_HOME}/bin/JhoveApp.jar:${EXTRA_JARS}
|
||||
|
||||
# Retrieve a copy of all command line arguments to pass to the application.
|
||||
|
||||
ARGS=""
|
||||
for ARG do
|
||||
ARGS="$ARGS $ARG"
|
||||
done
|
||||
|
||||
# Set the CLASSPATH and invoke the Java loader.
|
||||
${JAVA} -classpath $CP GDump $ARGS
|
||||
@@ -0,0 +1,37 @@
|
||||
#!/bin/sh
|
||||
|
||||
########################################################################
|
||||
# j2dump - JSTOR/Harvard Object Validation Environment
|
||||
# Copyright 2004-2005 by the President and Fellows of Harvard College
|
||||
# JHOVE is made available under the GNU General Public License (see the
|
||||
# file LICENSE for details)
|
||||
#
|
||||
# Driver script for the JPEG 2000 dump utility
|
||||
#
|
||||
# Usage: j2dump file
|
||||
#
|
||||
# where file is a JPEG file
|
||||
#
|
||||
# Configuration constants:
|
||||
|
||||
JHOVE_HOME=/users/stephen/projects/jhove
|
||||
|
||||
JAVA_HOME=/usr/java # Java JRE directory
|
||||
JAVA=$JAVA_HOME/bin/java # Java interpreter
|
||||
|
||||
EXTRA_JARS= # Extra .jar files to add to CLASSPATH
|
||||
|
||||
# NOTE: Nothing below this line should be edited
|
||||
########################################################################
|
||||
|
||||
CP=${JHOVE_HOME}/bin/JhoveApp.jar:${EXTRA_JARS}
|
||||
|
||||
# Retrieve a copy of all command line arguments to pass to the application.
|
||||
|
||||
ARGS=""
|
||||
for ARG do
|
||||
ARGS="$ARGS $ARG"
|
||||
done
|
||||
|
||||
# Set the CLASSPATH and invoke the Java loader.
|
||||
${JAVA} -classpath $CP J2Dump $ARGS
|
||||
+37
@@ -0,0 +1,37 @@
|
||||
#!/bin/sh
|
||||
|
||||
########################################################################
|
||||
# jdump - JSTOR/Harvard Object Validation Environment
|
||||
# Copyright 2004-2005 by the President and Fellows of Harvard College
|
||||
# JHOVE is made available under the GNU General Public License (see the
|
||||
# file LICENSE for details)
|
||||
#
|
||||
# Driver script for the JPEG dump utility
|
||||
#
|
||||
# Usage: jdump file
|
||||
#
|
||||
# where file is a JPEG file
|
||||
#
|
||||
# Configuration constants:
|
||||
|
||||
JHOVE_HOME=/users/stephen/projects/jhove
|
||||
|
||||
JAVA_HOME=/usr/java # Java JRE directory
|
||||
JAVA=$JAVA_HOME/bin/java # Java interpreter
|
||||
|
||||
EXTRA_JARS= # Extra .jar files to add to CLASSPATH
|
||||
|
||||
# NOTE: Nothing below this line should be edited
|
||||
########################################################################
|
||||
|
||||
CP=${JHOVE_HOME}/bin/JhoveApp.jar:${EXTRA_JARS}
|
||||
|
||||
# Retrieve a copy of all command line arguments to pass to the application.
|
||||
|
||||
ARGS=""
|
||||
for ARG do
|
||||
ARGS="$ARGS $ARG"
|
||||
done
|
||||
|
||||
# Set the CLASSPATH and invoke the Java loader.
|
||||
${JAVA} -classpath $CP JDump $ARGS
|
||||
+58
@@ -0,0 +1,58 @@
|
||||
#!/bin/sh
|
||||
|
||||
########################################################################
|
||||
# JHOVE - JSTOR/Harvard Object Validation Environment
|
||||
# Copyright 2003-2005 by JSTOR and the President and Fellows of Harvard College
|
||||
# JHOVE is made available under the GNU General Public License (see the
|
||||
# file LICENSE for details)
|
||||
#
|
||||
# Usage: jhove [-c config] [-m module] [-h handler] [-e encoding] [-H handler]
|
||||
# [-o output] [-x saxclass] [-t tempdir] [-b bufsize]
|
||||
# [-l loglevel] [[-krs] dir-file-or-uri [...]]
|
||||
#
|
||||
# where -c config Configuration file pathname
|
||||
# -m module Module name
|
||||
# -h handler Output handler name (defaults to TEXT)
|
||||
# -e encoding Character encoding of output handler (defaults to UTF-8)
|
||||
# -H handler About handler name
|
||||
# -o output Output file pathname (defaults to standard output)
|
||||
# -x saxclass SAX parser class (defaults to J2SE 1.4 default)
|
||||
# -t tempdir Temporary directory in which to create temporary files
|
||||
# -b bufsize Buffer size for buffered I/O (defaults to J2SE 1.4 default)
|
||||
# -k Calculate CRC32, MD5, and SHA-1 checksums
|
||||
# -r Display raw data flags, not textual equivalents
|
||||
# -s Format identification based on internal signatures only
|
||||
# dir-file-or-uri Directory, file pathname or URI of formatted content
|
||||
#
|
||||
# CHANGE for JHOVE 1.8:
|
||||
# You no longer have to figure out where JAVA_HOME is; that's the
|
||||
# operating system's job. If the OS tells you it can't find Java,
|
||||
# adjust your shell's path or revert to the old way (commented out).
|
||||
# Configuration constants:
|
||||
|
||||
#JHOVE_HOME=/users/gary/dev/jhove
|
||||
JHOVE_HOME=[fill in path to jhove directory]
|
||||
|
||||
JAVA_HOME=/usr/java # Java JRE directory -- change to your local java home
|
||||
JAVA=$JAVA_HOME/bin/java # Java interpreter -- usually won't need change
|
||||
|
||||
#XTRA_JARS=/users/stephen/xercesImpl.jar
|
||||
EXTRA_JARS= # Extra .jar files to add to CLASSPATH
|
||||
|
||||
# NOTE: Nothing below this line should be edited
|
||||
########################################################################
|
||||
|
||||
CP=${JHOVE_HOME}/bin/JhoveApp.jar:${EXTRA_JARS}
|
||||
|
||||
# Retrieve a copy of all command line arguments to pass to the application.
|
||||
|
||||
ARGS=""
|
||||
for ARG do
|
||||
ARGS="$ARGS $ARG"
|
||||
done
|
||||
|
||||
# Set the CLASSPATH and invoke the Java loader.
|
||||
#{JAVA} -classpath $CP Jhove $ARGS -x org.apache.xerces.parsers.SAXParser
|
||||
#${JAVA} -classpath $CP Jhove $ARGS
|
||||
# New way, doesn't require you to use JAVA_HOME.
|
||||
java -classpath $CP Jhove $ARGS
|
||||
@@ -0,0 +1,54 @@
|
||||
#!/bin/sh
|
||||
|
||||
########################################################################
|
||||
# JHOVE - JSTOR/Harvard Object Validation Environment
|
||||
# Copyright 2003-2004 by JSTOR and the President and Fellows of Harvard College
|
||||
# JHOVE is made available under the GNU General Public License (see the
|
||||
# file LICENSE for details)
|
||||
#
|
||||
# Copy jhove.tmpl to jhove, and replace the value of JHOVE_HOME with
|
||||
# the path to your jhove directory.
|
||||
#
|
||||
# Usage: jhove [-c config] [-m module [-p param]] [-h handler [-P param]]
|
||||
# [-e encoding] [-H handler] [-o output] [-x saxclass]
|
||||
# [-t tempdir] [-b bufsize] [[-krs] dir-file-or-uri [...]]
|
||||
#
|
||||
# where -c config Configuration file pathname
|
||||
# -m module Module name
|
||||
# -p param Module-specific parameter
|
||||
# -h handler Output handler name (defaults to TEXT)
|
||||
# -P param Handler-specific parameter
|
||||
# -o output Output file pathname (defaults to standard output)
|
||||
# -x saxclass SAX parser class (defaults to J2SE 1.4 default)
|
||||
# -t tempdir Temporary directory in which to create temporary files
|
||||
# -b bufsize Buffer size for buffered I/O (defaults to J2SE 1.4 default)
|
||||
# -k Calculate CRC32, MD5, and SHA-1 checksums
|
||||
# -r Display raw data flags, not textual equivalents
|
||||
# -s Format identification based on internal signatures only
|
||||
# dir-file-or-uri Directory, file pathname or URI of formatted content
|
||||
#
|
||||
# Configuration constants:
|
||||
|
||||
JHOVE_HOME=[your directory path]/jhove
|
||||
|
||||
JAVA_HOME=/usr/java
|
||||
JAVA=/usr/bin/java
|
||||
|
||||
#XTRA_JARS=/users/stephen/xercesImpl.jar
|
||||
EXTRA_JARS= # Extra .jar files to add to CLASSPATH
|
||||
|
||||
# NOTE: Nothing below this line should be edited
|
||||
########################################################################
|
||||
|
||||
CP=${JHOVE_HOME}/bin/JhoveApp.jar:${EXTRA_JARS}
|
||||
|
||||
# Retrieve a copy of all command line arguments to pass to the application.
|
||||
|
||||
ARGS=""
|
||||
for ARG do
|
||||
ARGS="$ARGS $ARG"
|
||||
done
|
||||
|
||||
# Set the CLASSPATH and invoke the Java loader.
|
||||
#{JAVA} -classpath $CP Jhove $ARGS -x org.apache.xerces.parsers.SAXParser
|
||||
${JAVA} -classpath $CP Jhove $ARGS
|
||||
@@ -0,0 +1,63 @@
|
||||
@ECHO OFF
|
||||
REM JHOVE - JSTOR/Harvard Object Validation Environment
|
||||
REM Copyright 2003-2005 by JSTOR and the President and Fellows of Harvard College
|
||||
REM JHOVE is made available under the GNU General Public License (see the
|
||||
REM file LICENSE for details)
|
||||
REM
|
||||
REM Usage: jhove [-c config] [-m module] [-h handler] [-e encoding]
|
||||
REM [-H handler] [-o output] [-x saxclass] [-t tempdir]
|
||||
REM [-b bufsize] [-l loglevel] [[-krs] dir-file-or-uri [...]]
|
||||
REM
|
||||
REM For Windows systems, copy jhove_bat.tmpl to jhove.bat and change
|
||||
REM the value of JHOVE_HOME to the path to your jhove directory.
|
||||
REM
|
||||
REM where -c config Configuration file pathname
|
||||
REM -m module Module name
|
||||
REM -h handler Output handler name (defaults to TEXT)
|
||||
REM -e encoding Character encoding of output handler (defaults to UTF-8)
|
||||
REM -H handler About handler name
|
||||
REM -o output Output file pathname (defaults to standard output)
|
||||
REM -x saxclass SAX parser class (defaults to J2SE 1.4 default)
|
||||
REM -t tempdir Temporary directory in which to create temporary files
|
||||
REM -b bufsize Buffer size for buffered I/O (defaults to J2SE default)
|
||||
REM -l loglevel Logging level
|
||||
REM -k Calculate CRC32, MD5, and SHA-1 checksums
|
||||
REM -r Display raw data flags, not textual equivalents
|
||||
REM -s Format identification based on internal signatures only
|
||||
REM dir-file-or-uri Directory, file pathname, or URI of formatted content
|
||||
REM
|
||||
REM Configuration constants:
|
||||
REM JHOVE_HOME Jhove installation directory
|
||||
REM JAVA_HOME Java JRE directory
|
||||
REM JAVA Java interpreter
|
||||
REM EXTRA_JARS Extra jar files to add to CLASSPATH
|
||||
|
||||
REM SET JHOVE_HOME="C:\Program Files\jhove"
|
||||
SET JHOVE_HOME="[your directory path]\jhove"
|
||||
|
||||
SET JAVA_HOME="C:\Program Files\java\j2re1.4.1_02"
|
||||
SET JAVA=%JAVA_HOME%\bin\java
|
||||
|
||||
SET EXTRA_JARS=
|
||||
|
||||
REM NOTE: Nothing below this line should be edited
|
||||
REM #########################################################################
|
||||
|
||||
|
||||
SET CP=%JHOVE_HOME%\bin\JhoveApp.jar
|
||||
IF "%EXTRA_JARS%"=="" GOTO FI
|
||||
SET CP=%CP%:%EXTRA_JARS
|
||||
:FI
|
||||
|
||||
REM Retrieve a copy of all command line arguments to pass to the application
|
||||
|
||||
SET ARGS=
|
||||
:WHILE
|
||||
IF "%1"=="" GOTO LOOP
|
||||
SET ARGS=%ARGS% %1
|
||||
SHIFT
|
||||
GOTO WHILE
|
||||
:LOOP
|
||||
|
||||
REM Set the CLASSPATH and invoke the Java loader
|
||||
%JAVA% -classpath %CP% Jhove %ARGS%
|
||||
Binary file not shown.
Binary file not shown.
@@ -0,0 +1,14 @@
|
||||
#!/usr/bin/perl -w
|
||||
|
||||
# Generate MD5 checksum
|
||||
|
||||
use Digest::MD5;
|
||||
|
||||
die "usage: md5.pl file\n" if $#ARGV < 0;
|
||||
|
||||
open (FILE, "<$ARGV[0]") or die "can't open file\"$ARGV[0]\"!\n";
|
||||
$ctx = Digest::MD5->new->addfile (*FILE);
|
||||
close (FILE);
|
||||
$digest = $ctx->hexdigest;
|
||||
|
||||
print "$digest\n";
|
||||
@@ -0,0 +1,44 @@
|
||||
#!/bin/sh
|
||||
#DO NOT RUN THIS ON A DEVELOPEMENT DIRECTORY, ONLY ON A
|
||||
#CHECKED-OUT COPY TO BE PACKAGED!
|
||||
|
||||
if [ "$1" = "" ]; then
|
||||
echo "Usage: packagejhove.sh [version]"
|
||||
echo "e.g., packagejhove.sh 1_8"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
echo "This script will prepare your directory for uploading."
|
||||
echo "DO NOT RUN IT unless you're a developer and know what"
|
||||
echo "you are doing. "
|
||||
|
||||
echo "Start in the top-level directory of the JHOVE checkout."
|
||||
echo "Run ant and ant javadoc and do any necessary testing and"
|
||||
echo "committing before running this script."
|
||||
echo
|
||||
echo
|
||||
|
||||
echo "To continue, enter the secret phrase."
|
||||
read OATH
|
||||
if [ "$OATH" != "I solemnly swear that I am up to no good" ]; then
|
||||
exit 1
|
||||
fi
|
||||
|
||||
cd ..
|
||||
cat >>CVSS << EOF
|
||||
CVS
|
||||
.cvsignore
|
||||
EOF
|
||||
tar cvfX jhove-$1.tar CVSS jhove
|
||||
gzip jhove-$1.tar
|
||||
cp -r jhove jhove-zip
|
||||
cd jhove-zip
|
||||
find . \( -name CVS -o -name .cvsignore \) -exec rm -r {} \;
|
||||
cd ..
|
||||
mv jhove jhove-ok
|
||||
mv jhove-zip jhove
|
||||
zip -r jhove-$1.zip jhove
|
||||
rm -r jhove
|
||||
mv jhove-ok jhove
|
||||
jhove/md5.pl jhove-$1.tar.gz >jhove-$1.tar.gz.md5
|
||||
jhove/md5.pl jhove-$1.zip >jhove-$1.zip.md5
|
||||
+37
@@ -0,0 +1,37 @@
|
||||
#!/bin/sh
|
||||
|
||||
########################################################################
|
||||
# pdump - JSTOR/Harvard Object Validation Environment
|
||||
# Copyright 2003-2005 by JSTOR and the President and Fellows of Harvard College
|
||||
# JHOVE is made available under the GNU General Public License (see the
|
||||
# file LICENSE for details)
|
||||
#
|
||||
# Driver script for the PDF dump utility
|
||||
#
|
||||
# Usage: pdump file
|
||||
#
|
||||
# where file is a PDF file
|
||||
#
|
||||
# Configuration constants:
|
||||
|
||||
JHOVE_HOME=/users/stephen/projects/jhove
|
||||
|
||||
JAVA_HOME=/usr/java # Java JRE directory
|
||||
JAVA=$JAVA_HOME/bin/java # Java interpreter
|
||||
|
||||
EXTRA_JARS= # Extra .jar files to add to CLASSPATH
|
||||
|
||||
# NOTE: Nothing below this line should be edited
|
||||
########################################################################
|
||||
|
||||
CP=${JHOVE_HOME}/bin/JhoveApp.jar:${EXTRA_JARS}
|
||||
|
||||
# Retrieve a copy of all command line arguments to pass to the application.
|
||||
|
||||
ARGS=""
|
||||
for ARG do
|
||||
ARGS="$ARGS $ARG"
|
||||
done
|
||||
|
||||
# Set the CLASSPATH and invoke the Java loader.
|
||||
${JAVA} -classpath $CP PDump $ARGS
|
||||
@@ -0,0 +1,24 @@
|
||||
#!/bin/sh
|
||||
|
||||
########################################################################
|
||||
# userhome - JSTOR/Harvard Object Validation Environment
|
||||
# Copyright 2004-2006 by the President and Fellows of Harvard College
|
||||
# JHOVE is made available under the GNU General Public License (see the
|
||||
# file LICENSE for details)
|
||||
#
|
||||
# Driver script to display the default Java user.home property
|
||||
#
|
||||
# Usage: userhome
|
||||
#
|
||||
# Configuration constants:
|
||||
|
||||
JHOVE_HOME=/users/stephen/projects/jhove
|
||||
|
||||
JAVA_HOME=/usr/java # Java JRE directory
|
||||
JAVA=$JAVA_HOME/bin/java # Java interpreter
|
||||
|
||||
# NOTE: Nothing below this line should be edited
|
||||
########################################################################
|
||||
|
||||
# Set the CLASSPATH and invoke the Java loader.
|
||||
${JAVA} -classpath ${JHOVE_HOME}/classes UserHome
|
||||
@@ -1,50 +0,0 @@
|
||||
#!/usr/bin/env python3
|
||||
# Original version by DeliciousPickle@github; modified
|
||||
|
||||
# This script must be edited to meet your needs.
|
||||
|
||||
import logging
|
||||
import os
|
||||
import sys
|
||||
|
||||
import ocrmypdf
|
||||
|
||||
# pylint: disable=logging-format-interpolation
|
||||
# pylint: disable=logging-not-lazy
|
||||
|
||||
script_dir = os.path.dirname(os.path.realpath(__file__))
|
||||
print(script_dir + '/batch.py: Start')
|
||||
|
||||
if len(sys.argv) > 1:
|
||||
start_dir = sys.argv[1]
|
||||
else:
|
||||
start_dir = '.'
|
||||
|
||||
if len(sys.argv) > 2:
|
||||
log_file = sys.argv[2]
|
||||
else:
|
||||
log_file = script_dir + '/ocr-tree.log'
|
||||
|
||||
logging.basicConfig(
|
||||
level=logging.INFO,
|
||||
format='%(asctime)s %(message)s',
|
||||
filename=log_file,
|
||||
filemode='w',
|
||||
)
|
||||
|
||||
ocrmypdf.configure_logging(ocrmypdf.Verbosity.default)
|
||||
|
||||
for dir_name, subdirs, file_list in os.walk(start_dir):
|
||||
logging.info(dir_name + '\n')
|
||||
os.chdir(dir_name)
|
||||
for filename in file_list:
|
||||
file_ext = os.path.splitext(filename)[1]
|
||||
if file_ext == '.pdf':
|
||||
full_path = dir_name + '/' + filename
|
||||
print(full_path)
|
||||
result = ocrmypdf.ocr(filename, filename, deskew=True)
|
||||
if result == ocrmypdf.ExitCode.already_done_ocr:
|
||||
print("Skipped document because it already contained text")
|
||||
elif result == ocrmypdf.ExitCode.ok:
|
||||
print("OCR complete")
|
||||
logging.info(result)
|
||||
@@ -1,99 +0,0 @@
|
||||
# ocrmypdf completion -*- shell-script -*-
|
||||
|
||||
set -o errexit
|
||||
|
||||
_ocrmypdf()
|
||||
{
|
||||
local cur prev cword words split
|
||||
|
||||
# Homebrew on Macs have version 1.3 of bash-completion which doesn't include - see #502
|
||||
if declare -F _init_completions >/dev/null 2>&1; then
|
||||
_init_completion -s || return
|
||||
else
|
||||
COMPREPLY=()
|
||||
_get_comp_words_by_ref cur prev words cword
|
||||
fi
|
||||
|
||||
if [[ $cur == -* ]]; then
|
||||
COMPREPLY=( $( compgen -W '--language --image-dpi --output-type
|
||||
--sidecar --version --jobs --quiet --verbose --title --author
|
||||
--subject --keywords --rotate-pages --remove-background --deskew
|
||||
--clean --clean-final --unpaper-args --oversample --remove-vectors
|
||||
--threshold --force-ocr --skip-text --redo-ocr
|
||||
--skip-big --jpeg-quality --png-quality --jbig2-lossy
|
||||
--max-image-mpixels --tesseract-config --tesseract-pagesegmode
|
||||
--help --tesseract-oem --pdf-renderer --tesseract-timeout
|
||||
--rotate-pages-threshold --pdfa-image-compression --user-words
|
||||
--user-patterns --keep-temporary-files --output-type
|
||||
--no-progress-bar --pages --fast-web-view' \
|
||||
-- "$cur" ) )
|
||||
return
|
||||
else
|
||||
_filedir
|
||||
return
|
||||
fi
|
||||
|
||||
case $prev in
|
||||
--version|-h|--help)
|
||||
return
|
||||
;;
|
||||
--user-words|--user-patterns|--tesseract-config)
|
||||
_filedir
|
||||
return
|
||||
;;
|
||||
--output-type)
|
||||
COMPREPLY=( $( compgen -W 'pdfa pdf pdfa-1 pdfa-2 pdfa-3' -- \
|
||||
"$cur" ) )
|
||||
return
|
||||
;;
|
||||
--pdf-renderer)
|
||||
COMPREPLY=( $( compgen -W 'auto hocr sandwich' -- "$cur" ) )
|
||||
return
|
||||
;;
|
||||
--pdfa-image-compression)
|
||||
COMPREPLY=( $( compgen -W 'auto jpeg lossless' -- "$cur" ) )
|
||||
return
|
||||
;;
|
||||
-O|--optimize|--tesseract-oem)
|
||||
COMPREPLY=( $( compgen -W '{0..3}' -- "$cur" ) )
|
||||
return
|
||||
;;
|
||||
--jpeg-quality|--png-quality)
|
||||
COMPREPLY=( $( compgen -W '{0..100}' -- "$cur" ) )
|
||||
return
|
||||
;;
|
||||
-l|--language)
|
||||
COMPREPLY=$( command tesseract --list-langs 2>/dev/null )
|
||||
COMPREPLY=( $( compgen -W '${COMPREPLY[@]##*:}' -- "$cur" ) )
|
||||
return
|
||||
;;
|
||||
--image-dpi|--oversample|--skip-big|--max-image-mpixels|\
|
||||
--tesseract-timeout|--rotate-pages-threshold)
|
||||
COMPREPLY=( $( compgen -P "$cur" -W '{0..9}' ) )
|
||||
return
|
||||
;;
|
||||
-j|--jobs)
|
||||
COMPREPLY=( $( compgen -W '{1..'$( _ncpus )'}' -- "$cur" ) )
|
||||
return
|
||||
;;
|
||||
-v|--verbose)
|
||||
COMPREPLY=( $( compgen -W '{0..2}' -- "$cur" ) ) # max level ?
|
||||
return
|
||||
;;
|
||||
--tesseract-pagesegmode)
|
||||
COMPREPLY=( $( compgen -W '{1..13}' -- "$cur" ) )
|
||||
return
|
||||
;;
|
||||
--sidecar|--title|--author|--subject|--keywords|--unpaper-args|--pages|--fast-web-view)
|
||||
# argument required but no completions available
|
||||
return
|
||||
;;
|
||||
esac
|
||||
|
||||
$split && return
|
||||
} &&
|
||||
complete -F _ocrmypdf ocrmypdf
|
||||
|
||||
set +o errexit
|
||||
|
||||
# ex: filetype=sh
|
||||
@@ -1,118 +0,0 @@
|
||||
complete -c ocrmypdf -x -n '__fish_is_first_arg' -l version
|
||||
complete -c ocrmypdf -x -n '__fish_is_first_arg' -s h -s "?" -l help
|
||||
|
||||
complete -c ocrmypdf -r -l sidecar -d "write OCR to text file"
|
||||
complete -c ocrmypdf -x -s q -l quiet
|
||||
|
||||
complete -c ocrmypdf -s r -l rotate-pages -d "rotate pages to correct orientation"
|
||||
complete -c ocrmypdf -s d -l deskew -d "fix small horizontal alignment skew"
|
||||
complete -c ocrmypdf -s c -l clean -d "clean document images before OCR"
|
||||
complete -c ocrmypdf -s i -l clean-final -d "clean document images and keep result"
|
||||
complete -c ocrmypdf -l remove-vectors -d "don't send vector objects to OCR"
|
||||
complete -c ocrmypdf -l threshold -d "threshold images before OCR"
|
||||
|
||||
complete -c ocrmypdf -s f -l force-ocr -d "OCR documents that already have printable text"
|
||||
complete -c ocrmypdf -s s -l skip-ocr -d "skip OCR on pages that text, otherwise try OCR"
|
||||
complete -c ocrmypdf -l redo-ocr -d "redo OCR on any pages that seem to have OCR already"
|
||||
|
||||
complete -c ocrmypdf -s k -l keep-temporary-files -d "keep temporary files (debug)"
|
||||
|
||||
function __fish_ocrmypdf_languages
|
||||
set langs (tesseract --list-langs ^/dev/null)
|
||||
set arr (string split '\n' $langs)
|
||||
for lang in $arr[2..-1]
|
||||
echo $lang
|
||||
end
|
||||
end
|
||||
complete -c ocrmypdf -x -s l -l language -a '(__fish_ocrmypdf_languages)' -d "language"
|
||||
|
||||
complete -c ocrmypdf -x -l image-dpi -d "assume this DPI if input image DPI is unknown"
|
||||
|
||||
function __fish_ocrmypdf_output_type
|
||||
echo -e "pdfa\t"(_ "output a PDF/A (default)")
|
||||
echo -e "pdf\t"(_ "output a standard PDF")
|
||||
echo -e "pdfa-1\t"(_ "output a PDF/A-1b")
|
||||
echo -e "pdfa-2\t"(_ "output a PDF/A-2b")
|
||||
echo -e "pdfa-3\t"(_ "output a PDF/A-3b")
|
||||
end
|
||||
complete -c ocrmypdf -x -l output-type -a '(__fish_ocrmypdf_output_type)' -d "select PDF output options"
|
||||
|
||||
function __fish_ocrmypdf_pdf_renderer
|
||||
echo -e "auto\t"(_ "auto select PDF renderer")
|
||||
echo -e "hocr\t"(_ "use hocr renderer")
|
||||
echo -e "sandwich\t"(_ "use sandwich renderer")
|
||||
end
|
||||
complete -c ocrmypdf -x -l pdf-renderer -a '(__fish_ocrmypdf_pdf_renderer)' -d "select PDF renderer options"
|
||||
|
||||
function __fish_ocrmypdf_optimize
|
||||
echo -e "0\t"(_ "do not optimize")
|
||||
echo -e "1\t"(_ "do safe, lossless optimizations (default)")
|
||||
echo -e "2\t"(_ "do some lossy optimizations")
|
||||
echo -e "3\t"(_ "do aggressive lossy optimizations (including lossy JBIG2)")
|
||||
end
|
||||
complete -c ocrmypdf -x -s O -l optimize -a '(__fish_ocrmypdf_optimize)' -d "select optimization level"
|
||||
|
||||
function __fish_ocrmypdf_verbose
|
||||
echo -e "0\t"(_ "standard output messages")
|
||||
echo -e "1\t"(_ "troubleshooting output messages")
|
||||
echo -e "2\t"(_ "debugging output messages")
|
||||
end
|
||||
complete -c ocrmypdf -x -s v -l verbose -a '(__fish_ocrmypdf_verbose)' -d "set verbosity level"
|
||||
|
||||
complete -c ocrmypdf -x -l no-progress-bar -d "disable the progress bar"
|
||||
|
||||
function __fish_ocrmypdf_pdfa_compression
|
||||
echo -e "auto\t"(_ "let Ghostscript decide how to compress images")
|
||||
echo -e "jpeg\t"(_ "convert color and grayscale images to JPEG")
|
||||
echo -e "lossless\t"(_ "convert color and grayscale images to lossless (PNG)")
|
||||
end
|
||||
complete -c ocrmypdf -x -l pdfa-image-compression -a '(__fish_ocrmypdf_pdfa_compression)' -d "set PDF/A image compression options"
|
||||
|
||||
complete -c ocrmypdf -x -s j -l jobs -d "how many worker processes to use"
|
||||
complete -c ocrmypdf -x -l title -d "set metadata"
|
||||
complete -c ocrmypdf -x -l author -d "set metadata"
|
||||
complete -c ocrmypdf -x -l subject -d "set metadata"
|
||||
complete -c ocrmypdf -x -l keywords -d "set metadata"
|
||||
complete -c ocrmypdf -x -l oversample -d "oversample images to this DPI"
|
||||
complete -c ocrmypdf -x -l skip-big -d "skip OCR on pages larger than this many MPixels"
|
||||
|
||||
complete -c ocrmypdf -x -l jpeg-quality -d "JPEG quality [0..100]"
|
||||
complete -c ocrmypdf -x -l png-quality -d "PNG quality [0..100]"
|
||||
complete -c ocrmypdf -x -l jbig2-lossy -d "enable lossy JBIG2 (see docs)"
|
||||
complete -c ocrmypdf -x -l max-image-mpixels -d "image decompression bomb threshold"
|
||||
complete -c ocrmypdf -x -l pages -d "apply OCR to only the specified pages"
|
||||
complete -c ocrmypdf -x -l tesseract-config -d "set custom tesseract config file"
|
||||
|
||||
function __fish_ocrmypdf_tesseract_pagesegmode
|
||||
echo -e "0\t"(_ "orientation and script detection (OSD) only")
|
||||
echo -e "1\t"(_ "automatic page segmentation with OSD")
|
||||
echo -e "2\t"(_ "automatic page segmentation, but no OSD, or OCR")
|
||||
echo -e "3\t"(_ "fully automatic page segmentation, but no OSD (default)")
|
||||
echo -e "4\t"(_ "assume a single column of text of variable sizes")
|
||||
echo -e "5\t"(_ "assume a single uniform block of vertically aligned text")
|
||||
echo -e "6\t"(_ "assume a single uniform block of text")
|
||||
echo -e "7\t"(_ "treat the image as a single text line")
|
||||
echo -e "8\t"(_ "treat the image as a single word")
|
||||
echo -e "9\t"(_ "treat the image as a single word in a circle")
|
||||
echo -e "10\t"(_ "treat the image as a single character")
|
||||
echo -e "11\t"(_ "sparse text - find as much text as possible in no particular order")
|
||||
echo -e "12\t"(_ "sparse text with OSD")
|
||||
echo -e "13\t"(_ "raw line - treat the image as a single text line")
|
||||
end
|
||||
complete -c ocrmypdf -x -l tesseract-pagesegmode -a '(__fish_ocrmypdf_tesseract_pagesegmode)' -d "set tesseract --psm"
|
||||
|
||||
function __fish_ocrmypdf_tesseract_oem
|
||||
echo -e "0\t"(_ "legacy engine only")
|
||||
echo -e "1\t"(_ "neural nets LSTM engine only")
|
||||
echo -e "2\t"(_ "legacy + LSTM engines")
|
||||
echo -e "3\t"(_ "default, based on what is available")
|
||||
end
|
||||
complete -c ocrmypdf -x -l tesseract-oem -a '(__fish_ocrmypdf_tesseract_oem)' -d "set tesseract --oem"
|
||||
complete -c ocrmypdf -x -l tesseract-timeout -d "maximum number of seconds to wait for OCR"
|
||||
complete -c ocrmypdf -x -l rotate-pages-threshold -d "page rotation confidence"
|
||||
|
||||
complete -c ocrmypdf -r -l user-words -d "specify location of user words file"
|
||||
complete -c ocrmypdf -r -l user-patterns -d "specify location of user patterns file"
|
||||
complete -c ocrmypdf -x -l fast-web-view -d "if file size if above this amount in MB, linearize PDF"
|
||||
|
||||
complete -c ocrmypdf -x -a "(__fish_complete_suffix .pdf)"
|
||||
@@ -1,15 +0,0 @@
|
||||
---
|
||||
version: "3.3"
|
||||
services:
|
||||
ocrmypdf:
|
||||
restart: always
|
||||
container_name: ocrmypdf
|
||||
image: jbarlow83/ocrmypdf
|
||||
volumes:
|
||||
- "/media/scan:/input"
|
||||
- "/mnt/scan:/output"
|
||||
environment:
|
||||
- OCR_OUTPUT_DIRECTORY_YEAR_MONT=0
|
||||
user: "<SET TO YOUR USER ID>:<SET TO YOUR GROUP ID>"
|
||||
entrypoint: python3
|
||||
command: watcher.py
|
||||
@@ -1,53 +0,0 @@
|
||||
# © 2020 James R Barlow: https://github.com/jbarlow83
|
||||
#
|
||||
# This program is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# This program is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
import logging
|
||||
|
||||
from PIL import Image
|
||||
|
||||
from ocrmypdf import hookimpl
|
||||
|
||||
log = logging.getLogger(__name__)
|
||||
|
||||
|
||||
@hookimpl
|
||||
def add_options(parser):
|
||||
parser.add_argument('--grayscale-ocr', action='store_true')
|
||||
|
||||
|
||||
@hookimpl
|
||||
def prepare(options):
|
||||
pass
|
||||
|
||||
|
||||
@hookimpl
|
||||
def validate(pdfinfo, options):
|
||||
pass
|
||||
|
||||
|
||||
@hookimpl
|
||||
def filter_ocr_image(page, image):
|
||||
if page.options.grayscale_ocr:
|
||||
log.info("graying")
|
||||
return image.convert('L')
|
||||
return image
|
||||
|
||||
|
||||
@hookimpl
|
||||
def filter_page_image(page, image_filename):
|
||||
output = image_filename.with_suffix('.jpg')
|
||||
with Image.open(image_filename) as im:
|
||||
im.save(output)
|
||||
return output
|
||||
@@ -1,72 +0,0 @@
|
||||
#!/bin/env python3
|
||||
# Contributed by github.com/Enantiomerie
|
||||
|
||||
# This script must be edited to meet your needs.
|
||||
|
||||
import logging
|
||||
import os
|
||||
import shutil
|
||||
import subprocess
|
||||
import sys
|
||||
import time
|
||||
|
||||
# pylint: disable=logging-format-interpolation
|
||||
# pylint: disable=logging-not-lazy
|
||||
|
||||
script_dir = os.path.dirname(os.path.realpath(__file__))
|
||||
timestamp = time.strftime("%Y-%m-%d-%H%M_")
|
||||
log_file = script_dir + '/' + timestamp + 'ocrmypdf.log'
|
||||
logging.basicConfig(
|
||||
level=logging.INFO,
|
||||
format='%(asctime)s %(message)s',
|
||||
filename=log_file,
|
||||
filemode='w',
|
||||
)
|
||||
|
||||
if len(sys.argv) > 1:
|
||||
start_dir = sys.argv[1]
|
||||
else:
|
||||
start_dir = '.'
|
||||
|
||||
for dir_name, subdirs, file_list in os.walk(start_dir):
|
||||
logging.info(dir_name)
|
||||
os.chdir(dir_name)
|
||||
for filename in file_list:
|
||||
file_stem, file_ext = os.path.splitext(filename)
|
||||
if file_ext != '.pdf':
|
||||
continue
|
||||
full_path = os.path.join(dir_name, filename)
|
||||
timestamp_ocr = time.strftime("%Y-%m-%d-%H%M_OCR_")
|
||||
filename_ocr = timestamp_ocr + file_stem + '.pdf'
|
||||
# create string for pdf processing
|
||||
# the script is processed as root user via chron
|
||||
cmd = [
|
||||
'docker',
|
||||
'run',
|
||||
'--rm',
|
||||
'-i',
|
||||
'jbarlow83/ocrmypdf',
|
||||
'--deskew',
|
||||
'-',
|
||||
'-',
|
||||
]
|
||||
logging.info(cmd)
|
||||
full_path_ocr = os.path.join(dir_name, filename_ocr)
|
||||
with open(filename, 'rb') as input_file, open(
|
||||
full_path_ocr, 'wb'
|
||||
) as output_file:
|
||||
proc = subprocess.run(
|
||||
cmd,
|
||||
stdin=input_file,
|
||||
stdout=output_file,
|
||||
stderr=subprocess.PIPE,
|
||||
check=False,
|
||||
)
|
||||
logging.info(proc.stderr.read())
|
||||
os.chmod(full_path_ocr, 0o664)
|
||||
os.chmod(full_path, 0o664)
|
||||
full_path_ocr_archive = sys.argv[2]
|
||||
full_path_archive = sys.argv[2] + '/no_ocr'
|
||||
shutil.move(full_path_ocr, full_path_ocr_archive)
|
||||
shutil.move(full_path, full_path_archive)
|
||||
logging.info('Finished.\n')
|
||||
-156
@@ -1,156 +0,0 @@
|
||||
# Copyright (C) 2019 Ian Alexander: https://github.com/ianalexander
|
||||
# Copyright (C) 2020 James R Barlow: https://github.com/jbarlow83
|
||||
#
|
||||
# This program is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# This program is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
import json
|
||||
import logging
|
||||
import os
|
||||
import sys
|
||||
import time
|
||||
from datetime import datetime
|
||||
from pathlib import Path
|
||||
|
||||
import pikepdf
|
||||
from watchdog.events import PatternMatchingEventHandler
|
||||
from watchdog.observers import Observer
|
||||
from watchdog.observers.polling import PollingObserver
|
||||
|
||||
import ocrmypdf
|
||||
|
||||
# pylint: disable=logging-format-interpolation
|
||||
|
||||
INPUT_DIRECTORY = os.getenv('OCR_INPUT_DIRECTORY', '/input')
|
||||
OUTPUT_DIRECTORY = os.getenv('OCR_OUTPUT_DIRECTORY', '/output')
|
||||
OUTPUT_DIRECTORY_YEAR_MONTH = bool(os.getenv('OCR_OUTPUT_DIRECTORY_YEAR_MONTH', ''))
|
||||
ON_SUCCESS_DELETE = bool(os.getenv('OCR_ON_SUCCESS_DELETE', ''))
|
||||
DESKEW = bool(os.getenv('OCR_DESKEW', ''))
|
||||
OCR_JSON_SETTINGS = json.loads(os.getenv('OCR_JSON_SETTINGS', '{}'))
|
||||
POLL_NEW_FILE_SECONDS = int(os.getenv('OCR_POLL_NEW_FILE_SECONDS', '1'))
|
||||
USE_POLLING = bool(os.getenv('OCR_USE_POLLING', ''))
|
||||
LOGLEVEL = os.getenv('OCR_LOGLEVEL', 'INFO').upper()
|
||||
PATTERNS = ['*.pdf']
|
||||
|
||||
log = logging.getLogger('ocrmypdf-watcher')
|
||||
|
||||
|
||||
def get_output_dir(root, basename):
|
||||
if OUTPUT_DIRECTORY_YEAR_MONTH:
|
||||
today = datetime.today()
|
||||
output_directory_year_month = (
|
||||
Path(root) / str(today.year) / f'{today.month:02d}'
|
||||
)
|
||||
if not output_directory_year_month.exists():
|
||||
output_directory_year_month.mkdir(parents=True, exist_ok=True)
|
||||
output_path = Path(output_directory_year_month) / basename
|
||||
else:
|
||||
output_path = Path(OUTPUT_DIRECTORY) / basename
|
||||
return output_path
|
||||
|
||||
|
||||
def wait_for_file_ready(file_path):
|
||||
# This loop waits to make sure that the file is completely loaded on
|
||||
# disk before attempting to read. Docker sometimes will publish the
|
||||
# watchdog event before the file is actually fully on disk, causing
|
||||
# pikepdf to fail.
|
||||
|
||||
retries = 5
|
||||
while retries:
|
||||
try:
|
||||
pdf = pikepdf.open(file_path)
|
||||
except (FileNotFoundError, pikepdf.PdfError) as e:
|
||||
log.info(f"File {file_path} is not ready yet")
|
||||
log.debug("Exception was", exc_info=e)
|
||||
time.sleep(POLL_NEW_FILE_SECONDS)
|
||||
retries -= 1
|
||||
else:
|
||||
pdf.close()
|
||||
return True
|
||||
|
||||
return False
|
||||
|
||||
|
||||
def execute_ocrmypdf(file_path):
|
||||
file_path = Path(file_path)
|
||||
output_path = get_output_dir(OUTPUT_DIRECTORY, file_path.name)
|
||||
|
||||
log.info("-" * 20)
|
||||
log.info(f'New file: {file_path}. Waiting until fully loaded...')
|
||||
if not wait_for_file_ready(file_path):
|
||||
log.info(f"Gave up waiting for {file_path} to become ready")
|
||||
return
|
||||
log.info(f'Attempting to OCRmyPDF to: {output_path}')
|
||||
exit_code = ocrmypdf.ocr(
|
||||
input_file=file_path,
|
||||
output_file=output_path,
|
||||
deskew=DESKEW,
|
||||
**OCR_JSON_SETTINGS,
|
||||
)
|
||||
if exit_code == 0 and ON_SUCCESS_DELETE:
|
||||
log.info(f'OCR is done. Deleting: {file_path}')
|
||||
file_path.unlink()
|
||||
else:
|
||||
log.info('OCR is done')
|
||||
|
||||
|
||||
class HandleObserverEvent(PatternMatchingEventHandler):
|
||||
def on_any_event(self, event):
|
||||
if event.event_type in ['created']:
|
||||
execute_ocrmypdf(event.src_path)
|
||||
|
||||
|
||||
def main():
|
||||
ocrmypdf.configure_logging(
|
||||
verbosity=ocrmypdf.Verbosity.default, manage_root_logger=True
|
||||
)
|
||||
log.setLevel(LOGLEVEL)
|
||||
log.info(
|
||||
f"Starting OCRmyPDF watcher with config:\n"
|
||||
f"Input Directory: {INPUT_DIRECTORY}\n"
|
||||
f"Output Directory: {OUTPUT_DIRECTORY}\n"
|
||||
f"Output Directory Year & Month: {OUTPUT_DIRECTORY_YEAR_MONTH}"
|
||||
)
|
||||
log.debug(
|
||||
f"INPUT_DIRECTORY: {INPUT_DIRECTORY}\n"
|
||||
f"OUTPUT_DIRECTORY: {OUTPUT_DIRECTORY}\n"
|
||||
f"OUTPUT_DIRECTORY_YEAR_MONTH: {OUTPUT_DIRECTORY_YEAR_MONTH}\n"
|
||||
f"ON_SUCCESS_DELETE: {ON_SUCCESS_DELETE}\n"
|
||||
f"DESKEW: {DESKEW}\n"
|
||||
f"ARGS: {OCR_JSON_SETTINGS}\n"
|
||||
f"POLL_NEW_FILE_SECONDS: {POLL_NEW_FILE_SECONDS}\n"
|
||||
f"USE_POLLING: {USE_POLLING}\n"
|
||||
f"LOGLEVEL: {LOGLEVEL}\n"
|
||||
)
|
||||
|
||||
if 'input_file' in OCR_JSON_SETTINGS or 'output_file' in OCR_JSON_SETTINGS:
|
||||
log.error('OCR_JSON_SETTINGS should not specify input file or output file')
|
||||
sys.exit(1)
|
||||
|
||||
handler = HandleObserverEvent(patterns=PATTERNS)
|
||||
if USE_POLLING:
|
||||
observer = PollingObserver()
|
||||
else:
|
||||
observer = Observer()
|
||||
observer.schedule(handler, INPUT_DIRECTORY, recursive=True)
|
||||
observer.start()
|
||||
try:
|
||||
while True:
|
||||
time.sleep(1)
|
||||
except KeyboardInterrupt:
|
||||
observer.stop()
|
||||
observer.join()
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
main()
|
||||
@@ -1,126 +0,0 @@
|
||||
# webservice.py wrapper for OCRmyPDF
|
||||
# Copyright (C) 2019 James R. Barlow: github.com/jbarlow83
|
||||
#
|
||||
# This program is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU Affero General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# This program is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU Affero General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU Affero General Public License
|
||||
# along with this program. If not, see <https://www.gnu.org/licenses/>.
|
||||
|
||||
"""This is a simple web service/HTTP wrapper for OCRmyPDF
|
||||
|
||||
This may be more convenient than the command line tool for some Docker users.
|
||||
Note that OCRmyPDF uses Ghostscript, which is licensed under AGPLv3+. While
|
||||
OCRmyPDF is under GPLv3, this file is distributed under the Affero GPLv3+ license,
|
||||
to emphasize that SaaS deployments should make sure they comply with
|
||||
Ghostscript's license as well as OCRmyPDF's.
|
||||
"""
|
||||
|
||||
import os
|
||||
import shlex
|
||||
from subprocess import PIPE, run
|
||||
from tempfile import TemporaryDirectory
|
||||
|
||||
from flask import (
|
||||
Flask,
|
||||
Response,
|
||||
abort,
|
||||
flash,
|
||||
redirect,
|
||||
request,
|
||||
send_from_directory,
|
||||
url_for,
|
||||
)
|
||||
from werkzeug.utils import secure_filename
|
||||
|
||||
app = Flask(__name__)
|
||||
app.secret_key = "secret"
|
||||
app.config['MAX_CONTENT_LENGTH'] = 50_000_000
|
||||
app.config.from_envvar("OCRMYPDF_WEBSERVICE_SETTINGS", silent=True)
|
||||
|
||||
ALLOWED_EXTENSIONS = set(["pdf"])
|
||||
|
||||
|
||||
def allowed_file(filename):
|
||||
return "." in filename and filename.rsplit(".", 1)[1].lower() in ALLOWED_EXTENSIONS
|
||||
|
||||
|
||||
def do_ocrmypdf(file):
|
||||
uploaddir = TemporaryDirectory(prefix="ocrmypdf-upload")
|
||||
downloaddir = TemporaryDirectory(prefix="ocrmypdf-download")
|
||||
|
||||
filename = secure_filename(file.filename)
|
||||
up_file = os.path.join(uploaddir.name, filename)
|
||||
file.save(up_file)
|
||||
|
||||
down_file = os.path.join(downloaddir.name, filename)
|
||||
|
||||
cmd_args = [arg for arg in shlex.split(request.form["params"])]
|
||||
if "--sidecar" in cmd_args:
|
||||
return Response("--sidecar not supported", 501, mimetype='text/plain')
|
||||
|
||||
ocrmypdf_args = ["ocrmypdf", *cmd_args, up_file, down_file]
|
||||
proc = run(ocrmypdf_args, stdout=PIPE, stderr=PIPE, encoding="utf-8")
|
||||
if proc.returncode != 0:
|
||||
stderr = proc.stderr
|
||||
return Response(stderr, 400, mimetype='text/plain')
|
||||
|
||||
return send_from_directory(downloaddir.name, filename)
|
||||
|
||||
|
||||
@app.route("/", methods=["GET", "POST"])
|
||||
def upload_file():
|
||||
if request.method == "POST":
|
||||
if "file" not in request.files:
|
||||
return Response("No file in POST", 400, mimetype='text/plain')
|
||||
file = request.files["file"]
|
||||
if file.filename == "":
|
||||
return Response("Empty filename", 400, mimetype='text/plain')
|
||||
if not allowed_file(file.filename):
|
||||
return Response("Invalid filename", 400, mimetype='text/plain')
|
||||
if file and allowed_file(file.filename):
|
||||
return do_ocrmypdf(file)
|
||||
return Response("Some other problem", 400, mimetype='text/plain')
|
||||
|
||||
return """
|
||||
<!doctype html>
|
||||
<title>OCRmyPDF webservice</title>
|
||||
<h1>Upload a PDF (debug UI)</h1>
|
||||
<form method=post enctype=multipart/form-data>
|
||||
<label for="args">Command line parameters</label>
|
||||
<input type=textbox name=params>
|
||||
<label for="file">File to upload</label>
|
||||
<input type=file name=file>
|
||||
<input type=submit value=Upload>
|
||||
</form>
|
||||
<h4>Notice</h2>
|
||||
<div style="font-size: 70%; max-width: 34em;">
|
||||
<p>This is a webservice wrapper for OCRmyPDF.</p>
|
||||
<p>Copyright 2019 James R. Barlow</p>
|
||||
<p>This program is free software: you can redistribute it and/or modify
|
||||
it under the terms of the GNU Affero General Public License as published by
|
||||
the Free Software Foundation, either version 3 of the License, or
|
||||
(at your option) any later version.
|
||||
</p>
|
||||
<p>This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
</p>
|
||||
<p>
|
||||
You should have received a copy of the GNU Affero General Public License
|
||||
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
</p>
|
||||
</div>
|
||||
"""
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
app.run(host='0.0.0.0', port=5000)
|
||||
@@ -1,33 +0,0 @@
|
||||
[build-system]
|
||||
requires = [
|
||||
"setuptools >= 30.3.0",
|
||||
"wheel",
|
||||
"cffi",
|
||||
"setuptools_scm",
|
||||
"setuptools_scm_git_archive"
|
||||
]
|
||||
build-backend = "setuptools.build_meta"
|
||||
|
||||
[tool.black]
|
||||
line-length = 88
|
||||
target-version = ["py36", "py37", "py38"]
|
||||
skip-string-normalization = true
|
||||
include = '\.pyi?$'
|
||||
exclude = '''
|
||||
/(
|
||||
\.eggs
|
||||
| \.git
|
||||
| \.hg
|
||||
| \.mypy_cache
|
||||
| \.tox
|
||||
| \.venv
|
||||
| _build
|
||||
| buck-out
|
||||
| build
|
||||
| dist
|
||||
| docs
|
||||
| misc
|
||||
| \.egg-info
|
||||
| src/ocrmypdf/lib/_leptonica.py
|
||||
)/
|
||||
'''
|
||||
@@ -1,12 +0,0 @@
|
||||
# requirements.txt can be used to replicate the developer's build environment
|
||||
# setup.py lists a separate set of requirements that are looser to simplify
|
||||
# installation
|
||||
cffi == 1.14.0
|
||||
coloredlogs == 14.0 # technically optional
|
||||
img2pdf == 0.3.6
|
||||
pdfminer.six == 20200517
|
||||
pikepdf == 1.16.1
|
||||
pluggy == 0.13.1
|
||||
Pillow == 7.1.2
|
||||
reportlab == 3.5.42
|
||||
tqdm == 4.46.1
|
||||
@@ -1,7 +0,0 @@
|
||||
pytest >= 5.0.0
|
||||
pytest-helpers-namespace >= 2019.1.8
|
||||
pytest-xdist >= 1.31.0
|
||||
pytest-cov >= 2.10.0
|
||||
python-xmp-toolkit == 2.0.1 # requires apt-get install libexempi3
|
||||
# or brew install exempi
|
||||
#PyMuPDF == 1.13.4 # optional
|
||||
@@ -1 +0,0 @@
|
||||
watchdog == 0.10.2
|
||||
@@ -1 +0,0 @@
|
||||
Flask >= 1, < 2
|
||||
@@ -1,29 +0,0 @@
|
||||
[bdist_wheel]
|
||||
python-tag = py35
|
||||
|
||||
[aliases]
|
||||
test=pytest
|
||||
|
||||
[check-manifest]
|
||||
ignore =
|
||||
.github
|
||||
|
||||
[tool:pytest]
|
||||
norecursedirs = lib .pc .git output cache resources
|
||||
testpaths = tests
|
||||
filterwarnings =
|
||||
ignore:.*XMLParser.*:DeprecationWarning
|
||||
markers =
|
||||
slow
|
||||
|
||||
[isort]
|
||||
multi_line_output=3
|
||||
include_trailing_comma=True
|
||||
force_grid_wrap=0
|
||||
use_parentheses=True
|
||||
line_length=88
|
||||
known_first_party = ocrmypdf
|
||||
known_third_party = PIL,_cffi_backend,cffi,flask,img2pdf,pdfminer,pikepdf,pkg_resources,pluggy,pytest,reportlab,setuptools,sphinx_rtd_theme,tqdm,watchdog,werkzeug
|
||||
|
||||
[metadata]
|
||||
license_file = LICENSE
|
||||
@@ -1,103 +0,0 @@
|
||||
#!/usr/bin/env python3
|
||||
# -*- coding: utf-8 -*-
|
||||
# © 2015 James R. Barlow: github.com/jbarlow83
|
||||
#
|
||||
# This file is part of OCRmyPDF.
|
||||
#
|
||||
# OCRmyPDF is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# OCRmyPDF is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with OCRmyPDF. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
from __future__ import print_function, unicode_literals
|
||||
|
||||
import sys
|
||||
|
||||
from setuptools import find_packages, setup
|
||||
|
||||
if sys.version_info < (3, 6):
|
||||
print("Python 3.6 or newer is required", file=sys.stderr)
|
||||
sys.exit(1)
|
||||
|
||||
if 'upload' in sys.argv[1:]:
|
||||
print('Use twine to upload the package - setup.py upload is insecure')
|
||||
sys.exit(1)
|
||||
|
||||
tests_require = open('requirements/test.txt', encoding='utf-8').read().splitlines()
|
||||
|
||||
|
||||
def readme():
|
||||
with open('README.md', encoding='utf-8') as f:
|
||||
return f.read()
|
||||
|
||||
|
||||
setup(
|
||||
name='ocrmypdf',
|
||||
description='OCRmyPDF adds an OCR text layer to scanned PDF files, allowing them to be searched',
|
||||
long_description=readme(),
|
||||
long_description_content_type='text/markdown',
|
||||
url='https://github.com/jbarlow83/OCRmyPDF',
|
||||
author='James R. Barlow',
|
||||
author_email='james@purplerock.ca',
|
||||
packages=find_packages('src', exclude=["tests", "tests.*"]),
|
||||
package_dir={'': 'src'},
|
||||
keywords=['PDF', 'OCR', 'optical character recognition', 'PDF/A', 'scanning'],
|
||||
classifiers=[
|
||||
"Programming Language :: Python :: 3.6",
|
||||
"Programming Language :: Python :: 3.7",
|
||||
"Programming Language :: Python :: 3.8",
|
||||
"Programming Language :: Python :: 3.9",
|
||||
"Development Status :: 5 - Production/Stable",
|
||||
"Environment :: Console",
|
||||
"Intended Audience :: End Users/Desktop",
|
||||
"Intended Audience :: Science/Research",
|
||||
"Intended Audience :: System Administrators",
|
||||
"License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
|
||||
"Operating System :: MacOS :: MacOS X",
|
||||
"Operating System :: Microsoft :: Windows :: Windows 10",
|
||||
"Operating System :: POSIX",
|
||||
"Operating System :: POSIX :: BSD",
|
||||
"Operating System :: POSIX :: Linux",
|
||||
"Topic :: Scientific/Engineering :: Image Recognition",
|
||||
"Topic :: Text Processing :: Indexing",
|
||||
"Topic :: Text Processing :: Linguistic",
|
||||
],
|
||||
python_requires=' >= 3.6',
|
||||
setup_requires=[ # can be removed whenever we can drop pip 9 support
|
||||
'cffi >= 1.9.1', # to build the leptonica module
|
||||
'pytest-runner', # to enable python setup.py test
|
||||
'setuptools_scm', # so that version will work
|
||||
'setuptools_scm_git_archive', # enable version from github tarballs
|
||||
],
|
||||
use_scm_version={'version_scheme': 'post-release'},
|
||||
cffi_modules=['src/ocrmypdf/lib/compile_leptonica.py:ffibuilder'],
|
||||
install_requires=[
|
||||
'cffi >= 1.9.1', # must be a setup and install requirement
|
||||
'coloredlogs >= 14.0', # strictly optional
|
||||
'img2pdf >= 0.3.0, < 0.4', # pure Python, so track HEAD closely
|
||||
'pdfminer.six >= 20191110, <= 20200726',
|
||||
'pikepdf >= 1.14.0, < 2',
|
||||
'Pillow >= 7.0.0',
|
||||
'pluggy >= 0.13.0',
|
||||
'reportlab >= 3.3.0', # oldest released version with sane image handling
|
||||
'tqdm >= 4',
|
||||
],
|
||||
tests_require=tests_require,
|
||||
entry_points={'console_scripts': ['ocrmypdf = ocrmypdf.__main__:run']},
|
||||
package_data={'ocrmypdf': ['data/sRGB.icc']},
|
||||
include_package_data=True,
|
||||
zip_safe=False,
|
||||
project_urls={
|
||||
'Documentation': 'https://ocrmypdf.readthedocs.io/',
|
||||
'Source': 'https://github.com/jbarlow83/ocrmypdf',
|
||||
'Tracker': 'https://github.com/jbarlow83/ocrmypdf/issues',
|
||||
},
|
||||
)
|
||||
@@ -0,0 +1,183 @@
|
||||
##############################################################################
|
||||
# Copyright (c) 2013: fritz-hh from Github (https://github.com/fritz-hh)
|
||||
#
|
||||
# Copyright (c) 2010: Jonathan Brinley from Github (https://github.com/jbrinley/HocrConverter)
|
||||
# Initial version by Jonathan Brinley, jonathanbrinley@gmail.com
|
||||
##############################################################################
|
||||
from reportlab.pdfgen.canvas import Canvas
|
||||
from reportlab.lib.units import inch
|
||||
from lxml import etree as ElementTree
|
||||
import Image, re, sys
|
||||
import argparse
|
||||
|
||||
class hocrTransform():
|
||||
"""
|
||||
A class for converting documents from the hOCR format.
|
||||
For details of the hOCR format, see:
|
||||
http://docs.google.com/View?docid=dfxcv4vc_67g844kf
|
||||
"""
|
||||
def __init__(self, hocrFileName, dpi):
|
||||
self.dpi = dpi
|
||||
self.boxPattern = re.compile('bbox((\s+\d+){4})')
|
||||
|
||||
self.hocr = ElementTree.ElementTree()
|
||||
self.hocr.parse(hocrFileName)
|
||||
|
||||
# if the hOCR file has a namespace, ElementTree requires its use to find elements
|
||||
matches = re.match('({.*})html', self.hocr.getroot().tag)
|
||||
self.xmlns = ''
|
||||
if matches:
|
||||
self.xmlns = matches.group(1)
|
||||
|
||||
# get dimension in pt (not pixel!!!!) of the OCRed image
|
||||
for div in self.hocr.findall(".//%sdiv[@class='ocr_page']"%(self.xmlns)):
|
||||
coords = self.element_coordinates(div)
|
||||
self.width = self.px2pt(coords[2]-coords[0])
|
||||
self.height = self.px2pt(coords[3]-coords[1])
|
||||
break # there shouldn't be more than one, and if there is, we don't want it
|
||||
|
||||
# no width and heigh definition in the ocr_image element of the hocr file
|
||||
if self.width is None:
|
||||
print "No page dimension found in the hocr file"
|
||||
sys.exit(1)
|
||||
|
||||
def __str__(self):
|
||||
"""
|
||||
Return the textual content of the HTML body
|
||||
"""
|
||||
if self.hocr is None:
|
||||
return ''
|
||||
body = self.hocr.find(".//%sbody"%(self.xmlns))
|
||||
if body:
|
||||
return self._get_element_text(body).encode('utf-8') # XML gives unicode
|
||||
else:
|
||||
return ''
|
||||
|
||||
def _get_element_text(self, element):
|
||||
"""
|
||||
Return the textual content of the element and its children
|
||||
"""
|
||||
text = ''
|
||||
if element.text is not None:
|
||||
text = text + element.text
|
||||
for child in element.getchildren():
|
||||
text = text + self._get_element_text(child)
|
||||
if element.tail is not None:
|
||||
text = text + element.tail
|
||||
return text
|
||||
|
||||
def element_coordinates(self, element):
|
||||
"""
|
||||
Returns a tuple containing the coordinates of the bounding box around
|
||||
an element
|
||||
"""
|
||||
out = (0,0,0,0)
|
||||
if 'title' in element.attrib:
|
||||
matches = self.boxPattern.search(element.attrib['title'])
|
||||
if matches:
|
||||
coords = matches.group(1).split()
|
||||
out = (int(coords[0]),int(coords[1]),int(coords[2]),int(coords[3]))
|
||||
return out
|
||||
|
||||
def px2pt(self, pxl):
|
||||
"""
|
||||
Returns the length in pt given length in pxl
|
||||
"""
|
||||
return float(pxl)/self.dpi*inch
|
||||
|
||||
def to_pdf(self, outFileName, imageFileName, showBoundingboxes, fontname="Helvetica"):
|
||||
"""
|
||||
Creates a PDF file with an image superimposed on top of the text.
|
||||
Text is positioned according to the bounding box of the lines in
|
||||
the hOCR file.
|
||||
The image need not be identical to the image used to create the hOCR file.
|
||||
It can have a lower resolution, different color mode, etc.
|
||||
"""
|
||||
# create the PDF file
|
||||
pdf = Canvas(outFileName, pagesize=(self.width, self.height), pageCompression=1) # page size in points (1/72 in.)
|
||||
|
||||
# draw bounding box for each paragraph
|
||||
pdf.setStrokeColorRGB(0,1,1) # light blue for bounding box of paragraph
|
||||
pdf.setFillColorRGB(0,1,1) # light blue for bounding box of paragraph
|
||||
pdf.setLineWidth(0) # no line for bounding box
|
||||
for elem in self.hocr.findall(".//%sp[@class='%s']" % (self.xmlns, "ocr_par")):
|
||||
|
||||
elemtxt=self._get_element_text(elem).rstrip()
|
||||
if len(elemtxt) == 0:
|
||||
continue
|
||||
|
||||
coords = self.element_coordinates(elem)
|
||||
x1=self.px2pt(coords[0])
|
||||
y1=self.px2pt(coords[1])
|
||||
x2=self.px2pt(coords[2])
|
||||
y2=self.px2pt(coords[3])
|
||||
|
||||
# draw the bbox border
|
||||
if showBoundingboxes == True:
|
||||
pdf.rect(x1, self.height-y2, x2-x1, y2-y1, fill=1)
|
||||
|
||||
|
||||
# check if element with class 'ocrx_word' are available
|
||||
# otherwise use 'ocr_line' as fallback
|
||||
elemclass="ocr_line"
|
||||
if self.hocr.find(".//%sspan[@class='ocrx_word']" %(self.xmlns)) is not None:
|
||||
elemclass="ocrx_word"
|
||||
|
||||
# itterate all text elements
|
||||
pdf.setStrokeColorRGB(1,0,0) # light green for bounding box of word/line
|
||||
pdf.setLineWidth(0.5) # bounding box line width
|
||||
pdf.setDash(6,3) # bounding box is dashed
|
||||
pdf.setFillColorRGB(0,0,0) # text in black
|
||||
for elem in self.hocr.findall(".//%sspan[@class='%s']" % (self.xmlns, elemclass)):
|
||||
|
||||
elemtxt=self._get_element_text(elem).rstrip()
|
||||
if len(elemtxt) == 0:
|
||||
continue
|
||||
|
||||
coords = self.element_coordinates(elem)
|
||||
x1=self.px2pt(coords[0])
|
||||
y1=self.px2pt(coords[1])
|
||||
x2=self.px2pt(coords[2])
|
||||
y2=self.px2pt(coords[3])
|
||||
|
||||
# draw the bbox border
|
||||
if showBoundingboxes == True:
|
||||
pdf.rect(x1, self.height-y2, x2-x1, y2-y1, fill=0)
|
||||
|
||||
text = pdf.beginText()
|
||||
fontsize=self.px2pt(coords[3]-coords[1])
|
||||
text.setFont(fontname, fontsize)
|
||||
|
||||
# set cursor to bottom left corner of bbox (adjust for dpi)
|
||||
text.setTextOrigin(x1, self.height-y2)
|
||||
|
||||
# scale the width of the text to fill the width of the bbox
|
||||
text.setHorizScale(100*(x2-x1)/pdf.stringWidth(elemtxt, fontname, fontsize))
|
||||
|
||||
# write the text to the page
|
||||
text.textLine(elemtxt)
|
||||
pdf.drawText(text)
|
||||
|
||||
# put the image on the page, scaled to fill the page
|
||||
if imageFileName != None:
|
||||
im = Image.open(imageFileName)
|
||||
pdf.drawInlineImage(im, 0, 0, width=self.width, height=self.height)
|
||||
|
||||
# finish up the page and save it
|
||||
pdf.showPage()
|
||||
pdf.save()
|
||||
|
||||
if __name__ == "__main__":
|
||||
parser = argparse.ArgumentParser(description='Convert hocr file to PDF')
|
||||
parser.add_argument('-b', '--boundingboxes', action="store_true", default=False, help='Show bounding boxes borders')
|
||||
parser.add_argument('-r', '--resolution', type=int, default=300, help='Resolution of the image that was OCRed')
|
||||
parser.add_argument('-i', '--image', default=None, help='Path to the image to be placed above the text')
|
||||
parser.add_argument('hocrfile', help='Path to the hocr file to be parsed')
|
||||
parser.add_argument('outputfile', help='Path to the PDF file to be generated')
|
||||
args = parser.parse_args()
|
||||
|
||||
hocr = hocrTransform(args.hocrfile, args.resolution)
|
||||
hocr.to_pdf(args.outputfile, args.image, args.boundingboxes)
|
||||
|
||||
|
||||
|
||||
@@ -1,41 +0,0 @@
|
||||
# © 2017 James R. Barlow: github.com/jbarlow83
|
||||
#
|
||||
# This file is part of OCRmyPDF.
|
||||
#
|
||||
# OCRmyPDF is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# OCRmyPDF is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with OCRmyPDF. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
|
||||
from pluggy import HookimplMarker as _HookimplMarker
|
||||
|
||||
from ocrmypdf import helpers, hocrtransform, leptonica, pdfa, pdfinfo
|
||||
from ocrmypdf._version import PROGRAM_NAME, __version__
|
||||
from ocrmypdf.api import Verbosity, configure_logging, ocr
|
||||
from ocrmypdf.exceptions import (
|
||||
BadArgsError,
|
||||
DpiError,
|
||||
EncryptedPdfError,
|
||||
ExitCode,
|
||||
ExitCodeException,
|
||||
InputFileError,
|
||||
MissingDependencyError,
|
||||
OutputFileAccessError,
|
||||
PdfMergeFailedError,
|
||||
PriorOcrFoundError,
|
||||
SubprocessOutputError,
|
||||
TesseractConfigError,
|
||||
UnsupportedImageFormatError,
|
||||
)
|
||||
from ocrmypdf.pluginspec import OcrEngine, OrientationConfidence
|
||||
|
||||
hookimpl = _HookimplMarker('ocrmypdf')
|
||||
@@ -1,85 +0,0 @@
|
||||
#!/usr/bin/env python3
|
||||
# © 2015-19 James R. Barlow: github.com/jbarlow83
|
||||
#
|
||||
# This file is part of OCRmyPDF.
|
||||
#
|
||||
# OCRmyPDF is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# OCRmyPDF is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with OCRmyPDF. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
import logging
|
||||
import os
|
||||
import signal
|
||||
import sys
|
||||
from multiprocessing import set_start_method
|
||||
|
||||
from ocrmypdf import __version__
|
||||
from ocrmypdf._plugin_manager import get_parser_options_plugins
|
||||
from ocrmypdf._sync import run_pipeline
|
||||
from ocrmypdf._validation import check_closed_streams, check_options
|
||||
from ocrmypdf.api import Verbosity, configure_logging
|
||||
from ocrmypdf.exceptions import (
|
||||
BadArgsError,
|
||||
ExitCode,
|
||||
InputFileError,
|
||||
MissingDependencyError,
|
||||
)
|
||||
|
||||
log = logging.getLogger('ocrmypdf')
|
||||
|
||||
|
||||
def sigbus(*args):
|
||||
raise InputFileError("Lost access to the input file")
|
||||
|
||||
|
||||
def run(args=None):
|
||||
_parser, options, plugin_manager = get_parser_options_plugins(args=args)
|
||||
|
||||
if not check_closed_streams(options):
|
||||
return ExitCode.bad_args
|
||||
|
||||
if hasattr(os, 'nice'):
|
||||
os.nice(5)
|
||||
|
||||
verbosity = options.verbose
|
||||
if not os.isatty(sys.stderr.fileno()):
|
||||
options.progress_bar = False
|
||||
if options.quiet:
|
||||
verbosity = Verbosity.quiet
|
||||
options.progress_bar = False
|
||||
configure_logging(
|
||||
verbosity, progress_bar_friendly=options.progress_bar, manage_root_logger=True
|
||||
)
|
||||
log.debug('ocrmypdf %s', __version__)
|
||||
try:
|
||||
check_options(options, plugin_manager)
|
||||
except ValueError as e:
|
||||
log.error(e)
|
||||
return ExitCode.bad_args
|
||||
except BadArgsError as e:
|
||||
log.error(e)
|
||||
return e.exit_code
|
||||
except MissingDependencyError as e:
|
||||
log.error(e)
|
||||
return ExitCode.missing_dependency
|
||||
|
||||
if hasattr(signal, 'SIGBUS'):
|
||||
signal.signal(signal.SIGBUS, sigbus)
|
||||
|
||||
result = run_pipeline(options=options, plugin_manager=plugin_manager)
|
||||
return result
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
if sys.platform == 'darwin' and sys.version_info < (3, 8):
|
||||
set_start_method('spawn') # see python bpo-33725
|
||||
sys.exit(run())
|
||||
@@ -1,148 +0,0 @@
|
||||
# © 2020 James R. Barlow: github.com/jbarlow83
|
||||
#
|
||||
# This file is part of OCRmyPDF.
|
||||
#
|
||||
# OCRmyPDF is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# OCRmyPDF is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with OCRmyPDF. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
import logging
|
||||
import logging.handlers
|
||||
import multiprocessing
|
||||
import os
|
||||
import signal
|
||||
import sys
|
||||
import threading
|
||||
from multiprocessing import Pool as ProcessPool
|
||||
from multiprocessing.dummy import Pool as ThreadPool
|
||||
from typing import Callable, Iterable, Optional
|
||||
|
||||
from tqdm import tqdm
|
||||
|
||||
from ocrmypdf.exceptions import InputFileError
|
||||
|
||||
|
||||
def log_listener(queue):
|
||||
"""Listen to the worker processes and forward the messages to logging
|
||||
|
||||
For simplicity this is a thread rather than a process. Only one process
|
||||
should actually write to sys.stderr or whatever we're using, so if this is
|
||||
made into a process the main application needs to be directed to it.
|
||||
|
||||
See https://docs.python.org/3/howto/logging-cookbook.html#logging-to-a-single-file-from-multiple-processes
|
||||
"""
|
||||
|
||||
while True:
|
||||
try:
|
||||
record = queue.get()
|
||||
if record is None:
|
||||
break
|
||||
logger = logging.getLogger(record.name)
|
||||
logger.handle(record)
|
||||
except Exception: # pylint: disable=broad-except
|
||||
import traceback # pylint: disable=import-outside-toplevel
|
||||
|
||||
print("Logging problem", file=sys.stderr)
|
||||
traceback.print_exc(file=sys.stderr)
|
||||
|
||||
|
||||
def process_sigbus(*args):
|
||||
raise InputFileError("A worker process lost access to an input file")
|
||||
|
||||
|
||||
def process_init(queue, user_init):
|
||||
"""Initialize a process pool worker"""
|
||||
|
||||
# Ignore SIGINT (our parent process will kill us gracefully)
|
||||
signal.signal(signal.SIGINT, signal.SIG_IGN)
|
||||
|
||||
# Install SIGBUS handler (so our parent process can abort somewhat gracefully)
|
||||
if hasattr(signal, 'SIGBUS'):
|
||||
signal.signal(signal.SIGBUS, process_sigbus)
|
||||
|
||||
# Reconfigure the root logger for this process to send all messages to a queue
|
||||
h = logging.handlers.QueueHandler(queue)
|
||||
root = logging.getLogger()
|
||||
root.handlers = []
|
||||
root.addHandler(h)
|
||||
|
||||
if user_init:
|
||||
user_init()
|
||||
|
||||
|
||||
def thread_init(_queue, user_init):
|
||||
# As a thread, block SIGBUS so the main thread deals with it...
|
||||
if hasattr(signal, 'SIGBUS'):
|
||||
signal.pthread_sigmask(signal.SIG_BLOCK, {signal.SIGBUS})
|
||||
if user_init:
|
||||
user_init()
|
||||
|
||||
|
||||
def exec_progress_pool(
|
||||
*,
|
||||
use_threads: bool,
|
||||
max_workers: int,
|
||||
tqdm_kwargs: dict,
|
||||
task_initializer: Optional[Callable] = None,
|
||||
task: Optional[Callable] = None,
|
||||
task_arguments: Optional[Iterable] = None,
|
||||
task_finished: Optional[Callable] = None,
|
||||
):
|
||||
log_queue: multiprocessing.Queue = multiprocessing.Queue(-1)
|
||||
listener = threading.Thread(target=log_listener, args=(log_queue,))
|
||||
|
||||
if use_threads:
|
||||
pool_class = ThreadPool
|
||||
initializer = thread_init
|
||||
else:
|
||||
pool_class = ProcessPool
|
||||
initializer = process_init
|
||||
listener.start()
|
||||
|
||||
with tqdm(**tqdm_kwargs) as pbar:
|
||||
pool = pool_class(
|
||||
processes=max_workers,
|
||||
initializer=initializer,
|
||||
initargs=(log_queue, task_initializer),
|
||||
)
|
||||
try:
|
||||
results = pool.imap_unordered(task, task_arguments)
|
||||
while True:
|
||||
try:
|
||||
result = results.next()
|
||||
if task_finished:
|
||||
task_finished(result, pbar)
|
||||
else:
|
||||
pbar.update()
|
||||
except StopIteration:
|
||||
break
|
||||
except KeyboardInterrupt:
|
||||
# Terminate pool so we exit instantly
|
||||
pool.terminate()
|
||||
# Don't try listener.join() here, will deadlock
|
||||
raise
|
||||
except Exception:
|
||||
if not os.environ.get("PYTEST_CURRENT_TEST", ""):
|
||||
# Unless inside pytest, exit immediately because no one wants
|
||||
# to wait for child processes to finalize results that will be
|
||||
# thrown away. Inside pytest, we want child processes to exit
|
||||
# cleanly so that they output an error messages or coverage data
|
||||
# we need from them.
|
||||
pool.terminate()
|
||||
raise
|
||||
finally:
|
||||
# Terminate log listener
|
||||
log_queue.put_nowait(None)
|
||||
pool.close()
|
||||
pool.join()
|
||||
|
||||
listener.join()
|
||||
@@ -1,18 +0,0 @@
|
||||
# © 2020 James R. Barlow: github.com/jbarlow83
|
||||
#
|
||||
# This file is part of OCRmyPDF.
|
||||
#
|
||||
# OCRmyPDF is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# OCRmyPDF is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with OCRmyPDF. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
"""Manage third party executables"""
|
||||
@@ -1,248 +0,0 @@
|
||||
# © 2017 James R. Barlow: github.com/jbarlow83
|
||||
#
|
||||
# This file is part of OCRmyPDF.
|
||||
#
|
||||
# OCRmyPDF is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# OCRmyPDF is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with OCRmyPDF. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
"""Interface to Ghostscript executable"""
|
||||
|
||||
import logging
|
||||
import os
|
||||
import re
|
||||
from io import BytesIO
|
||||
from os import fspath
|
||||
from pathlib import Path
|
||||
from shutil import which
|
||||
from subprocess import PIPE, CalledProcessError
|
||||
from typing import Optional, cast
|
||||
|
||||
from PIL import Image
|
||||
|
||||
from ocrmypdf.exceptions import MissingDependencyError, SubprocessOutputError
|
||||
from ocrmypdf.helpers import Resolution
|
||||
from ocrmypdf.subprocess import get_version, run
|
||||
|
||||
log = logging.getLogger(__name__)
|
||||
|
||||
_gswin = None
|
||||
if os.name == 'nt':
|
||||
_gswin = which('gswin64c')
|
||||
if not _gswin:
|
||||
_gswin = which('gswin32c')
|
||||
if not _gswin:
|
||||
raise MissingDependencyError(
|
||||
"""
|
||||
---------------------------------------------------------------------
|
||||
This error normally occurs when ocrmypdf can't Ghostscript. Please
|
||||
ensure Ghostscript is installed and its location is added to the
|
||||
system PATH environment variable.
|
||||
|
||||
For details see:
|
||||
https://ocrmypdf.readthedocs.io/en/latest/installation.html
|
||||
---------------------------------------------------------------------
|
||||
"""
|
||||
)
|
||||
_gswin = Path(_gswin).stem
|
||||
|
||||
GS = _gswin if _gswin else 'gs'
|
||||
del _gswin
|
||||
|
||||
|
||||
def version():
|
||||
return get_version(GS)
|
||||
|
||||
|
||||
def jpeg_passthrough_available() -> bool:
|
||||
"""Returns True if the installed version of Ghostscript supports JPEG passthru
|
||||
|
||||
Prior to 9.23, Ghostscript decode and re-encoded JPEGs internally. In 9.23
|
||||
it gained the ability to keep JPEGs unmodified. However, the 9.23
|
||||
implementation was buggy and would deletes the last two bytes of images in
|
||||
some cases, as reported here.
|
||||
https://bugs.ghostscript.com/show_bug.cgi?id=699216
|
||||
|
||||
The issue was fixed for 9.24, hence that is the first version we consider
|
||||
the feature available. (However, we don't use 9.24 at all, so the first
|
||||
version that allows JPEG passthrough is 9.25.
|
||||
|
||||
"""
|
||||
return version() >= '9.24'
|
||||
|
||||
|
||||
def _gs_error_reported(stream) -> bool:
|
||||
return True if re.search(r'error', stream, flags=re.IGNORECASE) else False
|
||||
|
||||
|
||||
def rasterize_pdf(
|
||||
input_file: os.PathLike,
|
||||
output_file: os.PathLike,
|
||||
*,
|
||||
raster_device: str,
|
||||
raster_dpi: Resolution,
|
||||
pageno: int = 1,
|
||||
page_dpi: Resolution = None,
|
||||
rotation: int = None,
|
||||
filter_vector: bool = False,
|
||||
):
|
||||
"""Rasterize one page of a PDF at resolution raster_dpi in canvas units."""
|
||||
raster_dpi = raster_dpi.round(6)
|
||||
if not page_dpi:
|
||||
page_dpi = raster_dpi
|
||||
|
||||
args_gs = (
|
||||
[
|
||||
GS,
|
||||
'-dQUIET',
|
||||
'-dSAFER',
|
||||
'-dBATCH',
|
||||
'-dNOPAUSE',
|
||||
f'-sDEVICE={raster_device}',
|
||||
f'-dFirstPage={pageno}',
|
||||
f'-dLastPage={pageno}',
|
||||
f'-r{raster_dpi.x:f}x{raster_dpi.y:f}',
|
||||
]
|
||||
+ (['-dFILTERVECTOR'] if filter_vector else [])
|
||||
+ [
|
||||
'-o',
|
||||
'-',
|
||||
'-sstdout=%stderr',
|
||||
'-dAutoRotatePages=/None', # Probably has no effect on raster
|
||||
'-f',
|
||||
fspath(input_file),
|
||||
]
|
||||
)
|
||||
|
||||
try:
|
||||
p = run(args_gs, stdout=PIPE, stderr=PIPE, check=True)
|
||||
except CalledProcessError as e:
|
||||
log.error(e.stderr.decode(errors='replace'))
|
||||
raise SubprocessOutputError('Ghostscript rasterizing failed')
|
||||
else:
|
||||
stderr = p.stderr.decode(errors='replace')
|
||||
if _gs_error_reported(stderr):
|
||||
log.error(stderr)
|
||||
elif stderr:
|
||||
log.debug(stderr)
|
||||
|
||||
with Image.open(BytesIO(p.stdout)) as im:
|
||||
if rotation is not None:
|
||||
log.debug("Rotating output by %i", rotation)
|
||||
# rotation is a clockwise angle and Image.ROTATE_* is
|
||||
# counterclockwise so this cancels out the rotation
|
||||
if rotation == 90:
|
||||
im = im.transpose(Image.ROTATE_90)
|
||||
elif rotation == 180:
|
||||
im = im.transpose(Image.ROTATE_180)
|
||||
elif rotation == 270:
|
||||
im = im.transpose(Image.ROTATE_270)
|
||||
if rotation % 180 == 90:
|
||||
page_dpi = page_dpi.flip_axis()
|
||||
im.save(fspath(output_file), dpi=page_dpi)
|
||||
|
||||
|
||||
def generate_pdfa(
|
||||
pdf_pages,
|
||||
output_file: os.PathLike,
|
||||
compression: str,
|
||||
pdf_version: str = '1.5',
|
||||
pdfa_part: str = '2',
|
||||
):
|
||||
compression_args = []
|
||||
if compression == 'jpeg':
|
||||
compression_args = [
|
||||
"-dAutoFilterColorImages=false",
|
||||
"-dColorImageFilter=/DCTEncode",
|
||||
"-dAutoFilterGrayImages=false",
|
||||
"-dGrayImageFilter=/DCTEncode",
|
||||
]
|
||||
elif compression == 'lossless':
|
||||
compression_args = [
|
||||
"-dAutoFilterColorImages=false",
|
||||
"-dColorImageFilter=/FlateEncode",
|
||||
"-dAutoFilterGrayImages=false",
|
||||
"-dGrayImageFilter=/FlateEncode",
|
||||
]
|
||||
else:
|
||||
compression_args = [
|
||||
"-dAutoFilterColorImages=true",
|
||||
"-dAutoFilterGrayImages=true",
|
||||
]
|
||||
|
||||
# Older versions of Ghostscript expect a leading slash in
|
||||
# sColorConversionStrategy, newer ones should not have it. See Ghostscript
|
||||
# git commit fe1c025d.
|
||||
strategy = 'RGB' if version() >= '9.19' else '/RGB'
|
||||
|
||||
if version() == '9.23':
|
||||
# 9.23: new feature JPEG passthrough is broken in some cases, best to
|
||||
# disable it always
|
||||
# https://bugs.ghostscript.com/show_bug.cgi?id=699216
|
||||
compression_args.append('-dPassThroughJPEGImages=false')
|
||||
|
||||
# nb no need to specify ProcessColorModel when ColorConversionStrategy
|
||||
# is set; see:
|
||||
# https://bugs.ghostscript.com/show_bug.cgi?id=699392
|
||||
args_gs = (
|
||||
[
|
||||
GS,
|
||||
"-dQUIET",
|
||||
"-dBATCH",
|
||||
"-dNOPAUSE",
|
||||
"-dSAFER",
|
||||
"-dCompatibilityLevel=" + str(pdf_version),
|
||||
"-sDEVICE=pdfwrite",
|
||||
"-dAutoRotatePages=/None",
|
||||
"-sColorConversionStrategy=" + strategy,
|
||||
]
|
||||
+ compression_args
|
||||
+ [
|
||||
"-dJPEGQ=95",
|
||||
"-dPDFA=" + pdfa_part,
|
||||
"-dPDFACompatibilityPolicy=1",
|
||||
"-o",
|
||||
"-",
|
||||
"-sstdout=%stderr",
|
||||
]
|
||||
)
|
||||
args_gs.extend(fspath(s) for s in pdf_pages) # Stringify Path objs
|
||||
try:
|
||||
with Path(output_file).open('wb') as output:
|
||||
p = run(args_gs, stdout=output, stderr=PIPE, check=True)
|
||||
except CalledProcessError as e:
|
||||
# Ghostscript does not change return code when it fails to create
|
||||
# PDF/A - check PDF/A status elsewhere
|
||||
log.error(e.stderr.decode(errors='replace'))
|
||||
raise SubprocessOutputError('Ghostscript PDF/A rendering failed')
|
||||
else:
|
||||
stderr = p.stderr.decode('utf-8', errors='replace')
|
||||
if _gs_error_reported(stderr):
|
||||
last_part = None
|
||||
repcount = 0
|
||||
for part in stderr.split('****'):
|
||||
if part != last_part:
|
||||
if repcount > 1:
|
||||
log.error(f"(previous error message repeated {repcount} times)")
|
||||
repcount = 0
|
||||
log.error(part)
|
||||
else:
|
||||
repcount += 1
|
||||
last_part = part
|
||||
elif 'overprint mode not set' in stderr:
|
||||
# Unless someone is going to print PDF/A documents on a
|
||||
# magical sRGB printer I can't see the removal of overprinting
|
||||
# being a problem....
|
||||
log.debug(
|
||||
"Ghostscript had to remove PDF 'overprinting' from the "
|
||||
"input file to complete PDF/A conversion. "
|
||||
)
|
||||
@@ -1,59 +0,0 @@
|
||||
# © 2018 James R. Barlow: github.com/jbarlow83
|
||||
#
|
||||
# This file is part of OCRmyPDF.
|
||||
#
|
||||
# OCRmyPDF is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# OCRmyPDF is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with OCRmyPDF. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
"""Interface to jbig2 executable"""
|
||||
|
||||
from subprocess import PIPE
|
||||
|
||||
from ocrmypdf.exceptions import MissingDependencyError
|
||||
from ocrmypdf.subprocess import get_version, run
|
||||
|
||||
|
||||
def version():
|
||||
return get_version('jbig2', regex=r'jbig2enc (\d+(\.\d+)*).*')
|
||||
|
||||
|
||||
def available():
|
||||
try:
|
||||
version()
|
||||
except MissingDependencyError:
|
||||
return False
|
||||
return True
|
||||
|
||||
|
||||
def convert_group(*, cwd, infiles, out_prefix):
|
||||
args = [
|
||||
'jbig2',
|
||||
'-b',
|
||||
out_prefix,
|
||||
'-s', # symbol mode (lossy)
|
||||
# '-r', # refinement mode (lossless symbol mode, currently disabled in
|
||||
# jbig2)
|
||||
'-p',
|
||||
]
|
||||
args.extend(infiles)
|
||||
proc = run(args, cwd=cwd, stdout=PIPE, stderr=PIPE)
|
||||
proc.check_returncode()
|
||||
return proc
|
||||
|
||||
|
||||
def convert_single(*, cwd, infile, outfile):
|
||||
args = ['jbig2', '-p', infile]
|
||||
with open(outfile, 'wb') as fstdout:
|
||||
proc = run(args, cwd=cwd, stdout=fstdout, stderr=PIPE)
|
||||
proc.check_returncode()
|
||||
return proc
|
||||
@@ -1,71 +0,0 @@
|
||||
# © 2018 James R. Barlow: github.com/jbarlow83
|
||||
#
|
||||
# This file is part of OCRmyPDF.
|
||||
#
|
||||
# OCRmyPDF is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# OCRmyPDF is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with OCRmyPDF. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
"""Interface to pngquant executable"""
|
||||
|
||||
from os import fspath
|
||||
from tempfile import NamedTemporaryFile
|
||||
|
||||
from PIL import Image
|
||||
|
||||
from ocrmypdf.exceptions import MissingDependencyError
|
||||
from ocrmypdf.subprocess import get_version, run
|
||||
|
||||
|
||||
def version():
|
||||
return get_version('pngquant', regex=r'(\d+(\.\d+)*).*')
|
||||
|
||||
|
||||
def available():
|
||||
try:
|
||||
version()
|
||||
except MissingDependencyError:
|
||||
return False
|
||||
return True
|
||||
|
||||
|
||||
def quantize(input_file, output_file, quality_min, quality_max):
|
||||
input_file = fspath(input_file)
|
||||
output_file = fspath(output_file)
|
||||
if input_file.endswith('.jpg'):
|
||||
with Image.open(input_file) as im, NamedTemporaryFile(suffix='.png') as tmp:
|
||||
im.save(tmp)
|
||||
args = [
|
||||
'pngquant',
|
||||
'--force',
|
||||
'--skip-if-larger',
|
||||
'--output',
|
||||
output_file,
|
||||
'--quality',
|
||||
f'{quality_min}-{quality_max}',
|
||||
'--',
|
||||
tmp.name,
|
||||
]
|
||||
run(args)
|
||||
else:
|
||||
args = [
|
||||
'pngquant',
|
||||
'--force',
|
||||
'--skip-if-larger',
|
||||
'--output',
|
||||
output_file,
|
||||
'--quality',
|
||||
f'{quality_min}-{quality_max}',
|
||||
'--',
|
||||
input_file,
|
||||
]
|
||||
run(args)
|
||||
@@ -1,345 +0,0 @@
|
||||
# © 2017 James R. Barlow: github.com/jbarlow83
|
||||
#
|
||||
# This file is part of OCRmyPDF.
|
||||
#
|
||||
# OCRmyPDF is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# OCRmyPDF is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with OCRmyPDF. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
"""Interface to Tesseract executable"""
|
||||
|
||||
import logging
|
||||
import os
|
||||
import shutil
|
||||
from collections import namedtuple
|
||||
from os import fspath
|
||||
from pathlib import Path
|
||||
from subprocess import PIPE, STDOUT, CalledProcessError, TimeoutExpired
|
||||
from typing import List
|
||||
|
||||
from PIL import Image
|
||||
|
||||
from ocrmypdf.exceptions import (
|
||||
MissingDependencyError,
|
||||
SubprocessOutputError,
|
||||
TesseractConfigError,
|
||||
)
|
||||
from ocrmypdf.subprocess import get_version, run
|
||||
|
||||
log = logging.getLogger(__name__)
|
||||
|
||||
OrientationConfidence = namedtuple('OrientationConfidence', ('angle', 'confidence'))
|
||||
|
||||
HOCR_TEMPLATE = """<?xml version="1.0" encoding="UTF-8"?>
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
|
||||
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||||
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
||||
<head>
|
||||
<title></title>
|
||||
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
|
||||
<meta name='ocr-system' content='tesseract 4.0.0' />
|
||||
<meta name='ocr-capabilities' content='ocr_page ocr_carea ocr_par ocr_line ocrx_word ocrp_wconf'/>
|
||||
</head>
|
||||
<body>
|
||||
<div class='ocr_page' id='page_1' title='image "_blank.png"; bbox 0 0 {0} {1}; ppageno 0'>
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
"""
|
||||
|
||||
|
||||
class TesseractLoggerAdapter(logging.LoggerAdapter):
|
||||
def process(self, msg, kwargs):
|
||||
kwargs['extra'] = self.extra
|
||||
return '[tesseract] %s' % (msg), kwargs
|
||||
|
||||
|
||||
def version():
|
||||
return get_version('tesseract', regex=r'tesseract\s(.+)')
|
||||
|
||||
|
||||
def has_textonly_pdf(langs=None):
|
||||
"""Does Tesseract have textonly_pdf capability?
|
||||
|
||||
Available in v4.00.00alpha since January 2017. Best to
|
||||
parse the parameter list.
|
||||
"""
|
||||
args_tess = tess_base_args(langs, engine_mode=None) + ['--print-parameters', 'pdf']
|
||||
params = ''
|
||||
try:
|
||||
proc = run(args_tess, check=True, stdout=PIPE, stderr=STDOUT)
|
||||
params = proc.stdout
|
||||
except CalledProcessError as e:
|
||||
raise MissingDependencyError(
|
||||
"Could not --print-parameters from tesseract. This can happen if the "
|
||||
"TESSDATA_PREFIX environment is not set to a valid tessdata folder. "
|
||||
) from e
|
||||
if b'textonly_pdf' in params:
|
||||
return True
|
||||
return False
|
||||
|
||||
|
||||
def has_user_words():
|
||||
"""Does Tesseract have --user-words capability?
|
||||
|
||||
Not available in 4.0, but available in 4.1. Also available in 3.x, but
|
||||
we no longer support 3.x.
|
||||
"""
|
||||
return version() >= '4.1'
|
||||
|
||||
|
||||
def get_languages():
|
||||
def lang_error(output):
|
||||
msg = (
|
||||
"Tesseract failed to report available languages.\n"
|
||||
"Output from Tesseract:\n"
|
||||
"-----------\n"
|
||||
)
|
||||
msg += output
|
||||
return msg
|
||||
|
||||
args_tess = ['tesseract', '--list-langs']
|
||||
try:
|
||||
proc = run(
|
||||
args_tess, universal_newlines=True, stdout=PIPE, stderr=STDOUT, check=True
|
||||
)
|
||||
output = proc.stdout
|
||||
except CalledProcessError as e:
|
||||
raise MissingDependencyError(lang_error(e.output)) from e
|
||||
|
||||
for line in output.splitlines():
|
||||
if line.startswith('Error'):
|
||||
raise MissingDependencyError(lang_error(output))
|
||||
_header, *rest = output.splitlines()
|
||||
return set(lang.strip() for lang in rest)
|
||||
|
||||
|
||||
def tess_base_args(langs: List[str], engine_mode: int) -> List[str]:
|
||||
args = ['tesseract']
|
||||
if langs:
|
||||
args.extend(['-l', '+'.join(langs)])
|
||||
if engine_mode is not None:
|
||||
args.extend(['--oem', str(engine_mode)])
|
||||
return args
|
||||
|
||||
|
||||
def get_orientation(input_file: Path, engine_mode: int, timeout: float):
|
||||
args_tesseract = tess_base_args(['osd'], engine_mode) + [
|
||||
'--psm',
|
||||
'0',
|
||||
fspath(input_file),
|
||||
'stdout',
|
||||
]
|
||||
|
||||
try:
|
||||
p = run(args_tesseract, stdout=PIPE, stderr=STDOUT, timeout=timeout, check=True)
|
||||
stdout = p.stdout
|
||||
except TimeoutExpired:
|
||||
return OrientationConfidence(angle=0, confidence=0.0)
|
||||
except CalledProcessError as e:
|
||||
tesseract_log_output(e.stdout)
|
||||
tesseract_log_output(e.stderr)
|
||||
if (
|
||||
b'Too few characters. Skipping this page' in e.output
|
||||
or b'Image too large' in e.output
|
||||
):
|
||||
return OrientationConfidence(0, 0)
|
||||
raise SubprocessOutputError() from e
|
||||
else:
|
||||
osd = {}
|
||||
for line in stdout.decode().splitlines():
|
||||
line = line.strip()
|
||||
parts = line.split(':', maxsplit=2)
|
||||
if len(parts) == 2:
|
||||
osd[parts[0].strip()] = parts[1].strip()
|
||||
|
||||
angle = int(osd.get('Orientation in degrees', 0))
|
||||
oc = OrientationConfidence(
|
||||
angle=angle, confidence=float(osd.get('Orientation confidence', 0))
|
||||
)
|
||||
return oc
|
||||
|
||||
|
||||
def tesseract_log_output(stream):
|
||||
tlog = TesseractLoggerAdapter(
|
||||
log, extra=log.extra if hasattr(log, 'extra') else None
|
||||
)
|
||||
|
||||
if not stream:
|
||||
return
|
||||
try:
|
||||
text = stream.decode()
|
||||
except UnicodeDecodeError:
|
||||
text = stream.decode('utf-8', 'ignore')
|
||||
|
||||
lines = text.splitlines()
|
||||
for line in lines:
|
||||
if line.startswith("Tesseract Open Source"):
|
||||
continue
|
||||
elif line.startswith("Warning in pixReadMem"):
|
||||
continue
|
||||
elif 'diacritics' in line:
|
||||
tlog.warning("lots of diacritics - possibly poor OCR")
|
||||
elif line.startswith('OSD: Weak margin'):
|
||||
tlog.warning("unsure about page orientation")
|
||||
elif 'Error in pixScanForForeground' in line:
|
||||
pass # Appears to be spurious/problem with nonwhite borders
|
||||
elif 'Error in boxClipToRectangle' in line:
|
||||
pass # Always appears with pixScanForForeground message
|
||||
elif 'parameter not found: ' in line.lower():
|
||||
tlog.error(line.strip())
|
||||
problem = line.split('found: ')[1]
|
||||
raise TesseractConfigError(problem)
|
||||
elif 'error' in line.lower() or 'exception' in line.lower():
|
||||
tlog.error(line.strip())
|
||||
elif 'warning' in line.lower():
|
||||
tlog.warning(line.strip())
|
||||
elif 'read_params_file' in line.lower():
|
||||
tlog.error(line.strip())
|
||||
else:
|
||||
tlog.info(line.strip())
|
||||
|
||||
|
||||
def page_timedout(timeout):
|
||||
if timeout == 0:
|
||||
return
|
||||
log.warning("[tesseract] took too long to OCR - skipping")
|
||||
|
||||
|
||||
def _generate_null_hocr(output_hocr, output_text, image):
|
||||
"""Produce a .hocr file that reports no text detected on a page that is
|
||||
the same size as the input image."""
|
||||
with Image.open(image) as im:
|
||||
w, h = im.size
|
||||
|
||||
output_hocr.write_text(HOCR_TEMPLATE.format(w, h), encoding='utf-8')
|
||||
output_text.write_text('[skipped page]', encoding='utf-8')
|
||||
|
||||
|
||||
def generate_hocr(
|
||||
input_file: Path,
|
||||
output_hocr: Path,
|
||||
output_text: Path,
|
||||
languages: List[str],
|
||||
engine_mode: int,
|
||||
tessconfig: List[str],
|
||||
timeout: float,
|
||||
pagesegmode: int,
|
||||
user_words,
|
||||
user_patterns,
|
||||
):
|
||||
prefix = output_hocr.with_suffix('')
|
||||
|
||||
args_tesseract = tess_base_args(languages, engine_mode)
|
||||
|
||||
if pagesegmode is not None:
|
||||
args_tesseract.extend(['--psm', str(pagesegmode)])
|
||||
|
||||
if user_words:
|
||||
args_tesseract.extend(['--user-words', user_words])
|
||||
|
||||
if user_patterns:
|
||||
args_tesseract.extend(['--user-patterns', user_patterns])
|
||||
|
||||
# Reminder: test suite tesseract test plugins will break after any changes
|
||||
# to the number of order parameters here
|
||||
args_tesseract.extend([input_file, prefix, 'hocr', 'txt'] + tessconfig)
|
||||
try:
|
||||
p = run(args_tesseract, stdout=PIPE, stderr=STDOUT, timeout=timeout, check=True)
|
||||
stdout = p.stdout
|
||||
except TimeoutExpired:
|
||||
# Generate a HOCR file with no recognized text if tesseract times out
|
||||
# Temporary workaround to hocrTransform not being able to function if
|
||||
# it does not have a valid hOCR file.
|
||||
page_timedout(timeout)
|
||||
_generate_null_hocr(output_hocr, output_text, input_file)
|
||||
except CalledProcessError as e:
|
||||
tesseract_log_output(e.output)
|
||||
if b'Image too large' in e.output:
|
||||
_generate_null_hocr(output_hocr, output_text, input_file)
|
||||
return
|
||||
|
||||
raise SubprocessOutputError() from e
|
||||
else:
|
||||
tesseract_log_output(stdout)
|
||||
# The sidecar text file will get the suffix .txt; rename it to
|
||||
# whatever caller wants it named
|
||||
if prefix.with_suffix('.txt').exists():
|
||||
shutil.move(prefix.with_suffix('.txt'), output_text)
|
||||
|
||||
|
||||
def use_skip_page(output_pdf, output_text):
|
||||
output_text.write_text('[skipped page]', encoding='utf-8')
|
||||
|
||||
# A 0 byte file to the output to indicate a skip
|
||||
output_pdf.write_bytes(b'')
|
||||
|
||||
|
||||
def generate_pdf(
|
||||
*,
|
||||
input_file: Path,
|
||||
output_pdf: Path,
|
||||
output_text: Path,
|
||||
languages: List[str],
|
||||
engine_mode: int,
|
||||
tessconfig: List[str],
|
||||
timeout: float,
|
||||
pagesegmode: int,
|
||||
user_words,
|
||||
user_patterns,
|
||||
):
|
||||
"""Use Tesseract to render a PDF.
|
||||
|
||||
input_file -- image to analyze
|
||||
output_pdf -- file to generate
|
||||
output_text -- OCR text file
|
||||
languages -- list of languages to consider
|
||||
engine_mode -- engine mode argument for tess v4
|
||||
tessconfig -- tesseract configuration
|
||||
timeout -- timeout (seconds)
|
||||
"""
|
||||
|
||||
args_tesseract = tess_base_args(languages, engine_mode)
|
||||
|
||||
if pagesegmode is not None:
|
||||
args_tesseract.extend(['--psm', str(pagesegmode)])
|
||||
|
||||
args_tesseract.extend(['-c', 'textonly_pdf=1'])
|
||||
|
||||
if user_words:
|
||||
args_tesseract.extend(['--user-words', user_words])
|
||||
|
||||
if user_patterns:
|
||||
args_tesseract.extend(['--user-patterns', user_patterns])
|
||||
|
||||
prefix = os.path.splitext(output_pdf)[0] # Tesseract appends suffixes
|
||||
|
||||
# Reminder: test suite tesseract test plugins might break after any changes
|
||||
# to the number of order parameters here
|
||||
|
||||
args_tesseract.extend([input_file, prefix, 'pdf', 'txt'] + tessconfig)
|
||||
try:
|
||||
p = run(args_tesseract, stdout=PIPE, stderr=STDOUT, timeout=timeout, check=True)
|
||||
stdout = p.stdout
|
||||
if os.path.exists(prefix + '.txt'):
|
||||
shutil.move(prefix + '.txt', output_text)
|
||||
except TimeoutExpired:
|
||||
page_timedout(timeout)
|
||||
use_skip_page(output_pdf, output_text)
|
||||
except CalledProcessError as e:
|
||||
tesseract_log_output(e.output)
|
||||
if b'Image too large' in e.output:
|
||||
use_skip_page(output_pdf, output_text)
|
||||
return
|
||||
raise SubprocessOutputError() from e
|
||||
else:
|
||||
tesseract_log_output(stdout)
|
||||
@@ -1,139 +0,0 @@
|
||||
# © 2015 James R. Barlow: github.com/jbarlow83
|
||||
#
|
||||
# This file is part of OCRmyPDF.
|
||||
#
|
||||
# OCRmyPDF is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# OCRmyPDF is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with OCRmyPDF. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
# unpaper documentation:
|
||||
# https://github.com/Flameeyes/unpaper/blob/master/doc/basic-concepts.md
|
||||
|
||||
"""Interface to unpaper executable"""
|
||||
|
||||
import logging
|
||||
import os
|
||||
import shlex
|
||||
from pathlib import Path
|
||||
from subprocess import PIPE, STDOUT, CalledProcessError
|
||||
from tempfile import TemporaryDirectory
|
||||
from typing import Tuple
|
||||
|
||||
from PIL import Image
|
||||
|
||||
from ocrmypdf.exceptions import MissingDependencyError, SubprocessOutputError
|
||||
from ocrmypdf.subprocess import get_version
|
||||
from ocrmypdf.subprocess import run as external_run
|
||||
|
||||
log = logging.getLogger(__name__)
|
||||
|
||||
|
||||
def version():
|
||||
return get_version('unpaper')
|
||||
|
||||
|
||||
def _setup_unpaper_io(tmpdir: Path, input_file: Path) -> Tuple[Path, Path]:
|
||||
SUFFIXES = {'1': '.pbm', 'L': '.pgm', 'RGB': '.ppm'}
|
||||
with Image.open(input_file) as im:
|
||||
im_modified = False
|
||||
if im.mode not in SUFFIXES:
|
||||
log.info("Converting image to other colorspace")
|
||||
try:
|
||||
if im.mode == 'P' and len(im.getcolors()) == 2:
|
||||
im = im.convert(mode='1')
|
||||
else:
|
||||
im = im.convert(mode='RGB')
|
||||
except IOError as e:
|
||||
raise MissingDependencyError(
|
||||
"Could not convert image with type " + im.mode
|
||||
) from e
|
||||
else:
|
||||
im_modified = True
|
||||
try:
|
||||
suffix = SUFFIXES[im.mode]
|
||||
except KeyError:
|
||||
raise MissingDependencyError(
|
||||
"Failed to convert image to a supported format."
|
||||
) from e
|
||||
|
||||
if im_modified or input_file.suffix != '.png':
|
||||
input_png = tmpdir / 'input.png'
|
||||
im.save(input_png, format='PNG', compress_level=1)
|
||||
else:
|
||||
# No changes, PNG input, just use the file we already have
|
||||
input_png = input_file
|
||||
output_pnm = tmpdir / f'output{suffix}'
|
||||
return input_png, output_pnm
|
||||
|
||||
|
||||
def run(input_file, output_file, dpi, mode_args):
|
||||
args_unpaper = ['unpaper', '-v', '--dpi', str(dpi)] + mode_args
|
||||
|
||||
with TemporaryDirectory() as tmpdir:
|
||||
input_png, output_pnm = _setup_unpaper_io(Path(tmpdir), input_file)
|
||||
|
||||
# To prevent any shenanigans from accepting arbitrary parameters in
|
||||
# --unpaper-args, we:
|
||||
# 1) run with cwd set to a tmpdir with only unpaper's files
|
||||
# 2) forbid the use of '/' in arguments, to prevent changing paths
|
||||
# 3) append absolute paths for the input and output file
|
||||
# This should ensure that a user cannot clobber some other file with
|
||||
# their unpaper arguments (whether intentionally or otherwise)
|
||||
args_unpaper.extend([os.fspath(input_png), os.fspath(output_pnm)])
|
||||
try:
|
||||
proc = external_run(
|
||||
args_unpaper,
|
||||
check=True,
|
||||
close_fds=True,
|
||||
universal_newlines=True,
|
||||
stderr=STDOUT, # unpaper writes logging output to stdout and stderr
|
||||
cwd=tmpdir, # and cannot send file output to stdout
|
||||
stdout=PIPE,
|
||||
)
|
||||
except CalledProcessError as e:
|
||||
log.debug(e.stderr)
|
||||
raise e from e
|
||||
else:
|
||||
log.debug(proc.stderr)
|
||||
try:
|
||||
with Image.open(output_pnm) as imout:
|
||||
imout.save(output_file, dpi=(dpi, dpi))
|
||||
except (FileNotFoundError, OSError):
|
||||
raise SubprocessOutputError(
|
||||
"unpaper: failed to produce the expected output file. "
|
||||
+ " Called with: "
|
||||
+ str(args_unpaper)
|
||||
) from None
|
||||
|
||||
|
||||
def validate_custom_args(args: str):
|
||||
unpaper_args = shlex.split(args)
|
||||
if any('/' in arg for arg in unpaper_args):
|
||||
raise ValueError('No filenames allowed in --unpaper-args')
|
||||
return unpaper_args
|
||||
|
||||
|
||||
def clean(input_file, output_file, dpi, unpaper_args=None):
|
||||
default_args = [
|
||||
'--layout',
|
||||
'none',
|
||||
'--mask-scan-size',
|
||||
'100', # don't blank out narrow columns
|
||||
'--no-border-align', # don't align visible content to borders
|
||||
'--no-mask-center', # don't center visible content within page
|
||||
'--no-grayfilter', # don't remove light gray areas
|
||||
'--no-blackfilter', # don't remove solid black areas
|
||||
'--no-deskew', # don't deskew
|
||||
]
|
||||
if not unpaper_args:
|
||||
unpaper_args = default_args
|
||||
run(input_file, output_file, dpi, unpaper_args)
|
||||
@@ -1,301 +0,0 @@
|
||||
# © 2018 James R. Barlow: github.com/jbarlow83
|
||||
#
|
||||
# This file is part of OCRmyPDF.
|
||||
#
|
||||
# OCRmyPDF is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# OCRmyPDF is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with OCRmyPDF. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
import logging
|
||||
from contextlib import suppress
|
||||
from pathlib import Path
|
||||
from typing import Optional
|
||||
|
||||
import pikepdf
|
||||
|
||||
log = logging.getLogger(__name__)
|
||||
MAX_REPLACE_PAGES = 100
|
||||
|
||||
|
||||
def _update_page_resources(*, page, font, font_key, procset):
|
||||
"""Update this page's fonts with a reference to the Glyphless font"""
|
||||
|
||||
if '/Resources' not in page:
|
||||
page['/Resources'] = pikepdf.Dictionary({})
|
||||
resources = page['/Resources']
|
||||
try:
|
||||
fonts = resources['/Font']
|
||||
except KeyError:
|
||||
fonts = pikepdf.Dictionary({})
|
||||
if font_key is not None and font_key not in fonts:
|
||||
fonts[font_key] = font
|
||||
resources['/Font'] = fonts
|
||||
|
||||
# Reassign /ProcSet to one that just lists everything - ProcSet is
|
||||
# obsolete and doesn't matter but recommended for old viewer support
|
||||
resources['/ProcSet'] = procset
|
||||
|
||||
|
||||
def strip_invisible_text(pdf, page):
|
||||
stream = []
|
||||
in_text_obj = False
|
||||
render_mode = 0
|
||||
text_objects = []
|
||||
|
||||
page.page_contents_coalesce()
|
||||
for operands, operator in pikepdf.parse_content_stream(page, ''):
|
||||
if not in_text_obj:
|
||||
if operator == pikepdf.Operator('BT'):
|
||||
in_text_obj = True
|
||||
render_mode = 0
|
||||
text_objects.append((operands, operator))
|
||||
else:
|
||||
stream.append((operands, operator))
|
||||
else:
|
||||
if operator == pikepdf.Operator('Tr'):
|
||||
render_mode = operands[0]
|
||||
text_objects.append((operands, operator))
|
||||
if operator == pikepdf.Operator('ET'):
|
||||
in_text_obj = False
|
||||
if render_mode != 3:
|
||||
stream.extend(text_objects)
|
||||
text_objects.clear()
|
||||
|
||||
def convert(op):
|
||||
try:
|
||||
return op.unparse()
|
||||
except AttributeError:
|
||||
return str(op).encode('ascii')
|
||||
|
||||
lines = []
|
||||
|
||||
for operands, operator in stream:
|
||||
if operator == pikepdf.Operator('INLINE IMAGE'):
|
||||
iim = operands[0]
|
||||
line = iim.unparse()
|
||||
else:
|
||||
line = b' '.join(convert(op) for op in operands) + b' ' + operator.unparse()
|
||||
lines.append(line)
|
||||
|
||||
content_stream = b'\n'.join(lines)
|
||||
page.Contents = pikepdf.Stream(pdf, content_stream)
|
||||
|
||||
|
||||
class OcrGrafter:
|
||||
def __init__(self, context):
|
||||
self.context = context
|
||||
self.path_base = context.origin
|
||||
|
||||
self.pdf_base = pikepdf.open(self.path_base)
|
||||
self.font, self.font_key = None, None
|
||||
|
||||
self.pdfinfo = context.pdfinfo
|
||||
self.output_file = context.get_path('graft_layers.pdf')
|
||||
|
||||
self.procset = self.pdf_base.make_indirect(
|
||||
pikepdf.Object.parse(b'[ /PDF /Text /ImageB /ImageC /ImageI ]')
|
||||
)
|
||||
|
||||
self.emplacements = 1
|
||||
self.interim_count = 0
|
||||
|
||||
def graft_page(
|
||||
self,
|
||||
*,
|
||||
pageno: int,
|
||||
image: Optional[Path],
|
||||
textpdf: Optional[Path],
|
||||
autorotate_correction: int,
|
||||
):
|
||||
if textpdf and not self.font:
|
||||
self.font, self.font_key = self._find_font(textpdf)
|
||||
|
||||
emplaced_page = False
|
||||
content_rotation = self.pdfinfo[pageno].rotation
|
||||
path_image = Path(image).resolve() if image else None
|
||||
if path_image is not None and path_image != self.path_base:
|
||||
# We are updating the old page with a rasterized PDF of the new
|
||||
# page (without changing objgen, to preserve references)
|
||||
log.debug("Emplacement update")
|
||||
with pikepdf.open(image) as pdf_image:
|
||||
self.emplacements += 1
|
||||
foreign_image_page = pdf_image.pages[0]
|
||||
self.pdf_base.pages.append(foreign_image_page)
|
||||
local_image_page = self.pdf_base.pages[-1]
|
||||
self.pdf_base.pages[pageno].emplace(local_image_page)
|
||||
del self.pdf_base.pages[-1]
|
||||
emplaced_page = True
|
||||
|
||||
if emplaced_page:
|
||||
content_rotation = autorotate_correction
|
||||
text_rotation = autorotate_correction
|
||||
text_misaligned = (text_rotation - content_rotation) % 360
|
||||
log.debug(
|
||||
f"Rotations for page {pageno}: [text, auto, misalign, content] = "
|
||||
f"{text_rotation}, {autorotate_correction}, "
|
||||
f"{text_misaligned}, {content_rotation}"
|
||||
)
|
||||
|
||||
if textpdf and self.font:
|
||||
# Graft the text layer onto this page, whether new or old
|
||||
strip_old = self.context.options.redo_ocr
|
||||
self._graft_text_layer(
|
||||
page_num=pageno + 1,
|
||||
textpdf=textpdf,
|
||||
font=self.font,
|
||||
font_key=self.font_key,
|
||||
rotation=text_misaligned,
|
||||
procset=self.procset,
|
||||
strip_old_text=strip_old,
|
||||
)
|
||||
|
||||
# Correct the rotation if applicable
|
||||
self.pdf_base.pages[pageno].Rotate = (
|
||||
content_rotation - autorotate_correction
|
||||
) % 360
|
||||
|
||||
if self.emplacements % MAX_REPLACE_PAGES == 0:
|
||||
self.save_and_reload()
|
||||
|
||||
def save_and_reload(self):
|
||||
"""Save and reload the Pdf.
|
||||
|
||||
This will keep a lid on our memory usage for very large files. Attach
|
||||
the font to page 1 even if page 1 doesn't use it, so we have a way to get it
|
||||
back.
|
||||
"""
|
||||
|
||||
page0 = self.pdf_base.pages[0]
|
||||
_update_page_resources(
|
||||
page=page0, font=self.font, font_key=self.font_key, procset=self.procset
|
||||
)
|
||||
|
||||
# We cannot read and write the same file, that will corrupt it
|
||||
# but we don't to keep more copies than we need to. Delete intermediates.
|
||||
# {interim_count} is the opened file we were updateing
|
||||
# {interim_count - 1} can be deleted
|
||||
# {interim_count + 1} is the new file will produce and open
|
||||
old_file = self.output_file.with_suffix(f'.working{self.interim_count - 1}.pdf')
|
||||
if not self.context.options.keep_temporary_files:
|
||||
with suppress(FileNotFoundError):
|
||||
old_file.unlink()
|
||||
|
||||
next_file = self.output_file.with_suffix(
|
||||
f'.working{self.interim_count + 1}.pdf'
|
||||
)
|
||||
self.pdf_base.save(next_file)
|
||||
self.pdf_base.close()
|
||||
|
||||
self.pdf_base = pikepdf.open(next_file)
|
||||
self.procset = self.pdf_base.pages[0].Resources.ProcSet
|
||||
self.font, self.font_key = None, None # Ensure we reacquire this information
|
||||
self.interim_count += 1
|
||||
|
||||
def finalize(self):
|
||||
self.pdf_base.save(self.output_file)
|
||||
self.pdf_base.close()
|
||||
return self.output_file
|
||||
|
||||
def _find_font(self, text):
|
||||
"""Copy a font from the filename text into pdf_base"""
|
||||
|
||||
font, font_key = None, None
|
||||
possible_font_names = ('/f-0-0', '/F1')
|
||||
try:
|
||||
with pikepdf.open(text) as pdf_text:
|
||||
try:
|
||||
pdf_text_fonts = pdf_text.pages[0].Resources.get('/Font', {})
|
||||
except (AttributeError, IndexError, KeyError):
|
||||
return None, None
|
||||
for f in possible_font_names:
|
||||
pdf_text_font = pdf_text_fonts.get(f, None)
|
||||
if pdf_text_font is not None:
|
||||
font_key = f
|
||||
break
|
||||
if pdf_text_font:
|
||||
font = self.pdf_base.copy_foreign(pdf_text_font)
|
||||
return font, font_key
|
||||
except (FileNotFoundError, pikepdf.PdfError):
|
||||
# PdfError occurs if a 0-length file is written e.g. due to OCR timeout
|
||||
return None, None
|
||||
|
||||
def _graft_text_layer(
|
||||
self,
|
||||
*,
|
||||
page_num: int,
|
||||
textpdf: Path,
|
||||
font: pikepdf.Object,
|
||||
font_key: pikepdf.Object,
|
||||
procset: pikepdf.Object,
|
||||
rotation: int,
|
||||
strip_old_text: bool,
|
||||
):
|
||||
"""Insert the text layer from text page 0 on to pdf_base at page_num"""
|
||||
|
||||
log.debug("Grafting")
|
||||
if Path(textpdf).stat().st_size == 0:
|
||||
return
|
||||
|
||||
# This is a pointer indicating a specific page in the base file
|
||||
with pikepdf.open(textpdf) as pdf_text:
|
||||
pdf_text_contents = pdf_text.pages[0].Contents.read_bytes()
|
||||
|
||||
base_page = self.pdf_base.pages.p(page_num)
|
||||
|
||||
# The text page always will be oriented up by this stage but the original
|
||||
# content may have a rotation applied. Wrap the text stream with a rotation
|
||||
# so it will be oriented the same way as the rest of the page content.
|
||||
# (Previous versions OCRmyPDF rotated the content layer to match the text.)
|
||||
mediabox = [float(pdf_text.pages[0].MediaBox[v]) for v in range(4)]
|
||||
wt, ht = mediabox[2] - mediabox[0], mediabox[3] - mediabox[1]
|
||||
|
||||
mediabox = [float(base_page.MediaBox[v]) for v in range(4)]
|
||||
wp, hp = mediabox[2] - mediabox[0], mediabox[3] - mediabox[1]
|
||||
|
||||
translate = pikepdf.PdfMatrix().translated(-wt / 2, -ht / 2)
|
||||
untranslate = pikepdf.PdfMatrix().translated(wp / 2, hp / 2)
|
||||
corner = pikepdf.PdfMatrix().translated(mediabox[0], mediabox[1])
|
||||
# -rotation because the input is a clockwise angle and this formula
|
||||
# uses CCW
|
||||
rotation = -rotation % 360
|
||||
rotate = pikepdf.PdfMatrix().rotated(rotation)
|
||||
|
||||
# Because of rounding of DPI, we might get a text layer that is not
|
||||
# identically sized to the target page. Scale to adjust. Normally this
|
||||
# is within 0.998.
|
||||
if rotation in (90, 270):
|
||||
wt, ht = ht, wt
|
||||
scale_x = wp / wt
|
||||
scale_y = hp / ht
|
||||
|
||||
# log.debug('%r', scale_x, scale_y)
|
||||
scale = pikepdf.PdfMatrix().scaled(scale_x, scale_y)
|
||||
|
||||
# Translate the text so it is centered at (0, 0), rotate it there, adjust
|
||||
# for a size different between initial and text PDF, then untranslate, and
|
||||
# finally move the lower left corner to match the mediabox
|
||||
ctm = translate @ rotate @ scale @ untranslate @ corner
|
||||
|
||||
pdf_text_contents = (
|
||||
b'q %s cm\n' % ctm.encode() + pdf_text_contents + b'\nQ\n'
|
||||
)
|
||||
|
||||
new_text_layer = pikepdf.Stream(self.pdf_base, pdf_text_contents)
|
||||
|
||||
if strip_old_text:
|
||||
strip_invisible_text(self.pdf_base, base_page)
|
||||
|
||||
base_page.page_contents_add(new_text_layer, prepend=True)
|
||||
|
||||
_update_page_resources(
|
||||
page=base_page, font=font, font_key=font_key, procset=procset
|
||||
)
|
||||
@@ -1,89 +0,0 @@
|
||||
# © 2018 James R. Barlow: github.com/jbarlow83
|
||||
#
|
||||
# This file is part of OCRmyPDF.
|
||||
#
|
||||
# OCRmyPDF is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# OCRmyPDF is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with OCRmyPDF. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
import os
|
||||
import shutil
|
||||
import sys
|
||||
from argparse import Namespace
|
||||
from copy import copy
|
||||
from io import IOBase
|
||||
from pathlib import Path
|
||||
from typing import Iterator
|
||||
|
||||
from ocrmypdf.pdfinfo import PdfInfo
|
||||
|
||||
|
||||
class PdfContext:
|
||||
"""Holds our context for a particular run of the pipeline"""
|
||||
|
||||
def __init__(
|
||||
self,
|
||||
options: Namespace,
|
||||
work_folder: Path,
|
||||
origin: Path,
|
||||
pdfinfo: PdfInfo,
|
||||
plugin_manager,
|
||||
):
|
||||
self.options = options
|
||||
self.work_folder = work_folder
|
||||
self.origin = origin
|
||||
self.pdfinfo = pdfinfo
|
||||
self.plugin_manager = plugin_manager
|
||||
|
||||
def get_path(self, name: str) -> Path:
|
||||
return self.work_folder / name
|
||||
|
||||
def get_page_contexts(self) -> Iterator['PageContext']:
|
||||
npages = len(self.pdfinfo)
|
||||
for n in range(npages):
|
||||
yield PageContext(self, n)
|
||||
|
||||
|
||||
class PageContext:
|
||||
"""Holds our context for a page
|
||||
|
||||
Must be pickable, so stores only intrinsic/simple data elements or those
|
||||
capable of their serializing themselves via __getstate__.
|
||||
"""
|
||||
|
||||
def __init__(self, pdf_context: PdfContext, pageno):
|
||||
self.work_folder = pdf_context.work_folder
|
||||
self.origin = pdf_context.origin
|
||||
self.options = pdf_context.options
|
||||
self.pageno = pageno
|
||||
self.pageinfo = pdf_context.pdfinfo[pageno]
|
||||
self.plugin_manager = pdf_context.plugin_manager
|
||||
|
||||
def get_path(self, name: str) -> Path:
|
||||
return self.work_folder / ("%06d_%s" % (self.pageno + 1, name))
|
||||
|
||||
def __getstate__(self):
|
||||
state = self.__dict__.copy()
|
||||
|
||||
state['options'] = copy(self.options)
|
||||
if not isinstance(state['options'].input_file, (str, bytes, os.PathLike)):
|
||||
state['options'].input_file = 'stream'
|
||||
if not isinstance(state['options'].output_file, (str, bytes, os.PathLike)):
|
||||
state['options'].output_file = 'stream'
|
||||
return state
|
||||
|
||||
|
||||
def cleanup_working_files(work_folder: Path, options: Namespace):
|
||||
if options.keep_temporary_files:
|
||||
print(f"Temporary working files retained at:\n{work_folder}", file=sys.stderr)
|
||||
else:
|
||||
shutil.rmtree(work_folder, ignore_errors=True)
|
||||
@@ -1,60 +0,0 @@
|
||||
# © 2020 James R. Barlow: github.com/jbarlow83
|
||||
#
|
||||
# This file is part of OCRmyPDF.
|
||||
#
|
||||
# OCRmyPDF is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# OCRmyPDF is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with OCRmyPDF. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
import logging
|
||||
import sys
|
||||
from contextlib import suppress
|
||||
|
||||
from tqdm import tqdm
|
||||
|
||||
|
||||
class PageNumberFilter(logging.Filter):
|
||||
def filter(self, record):
|
||||
pageno = getattr(record, 'pageno', None)
|
||||
if isinstance(pageno, int):
|
||||
record.pageno = f'{pageno:5d} '
|
||||
elif pageno is None:
|
||||
record.pageno = ''
|
||||
return True
|
||||
|
||||
|
||||
class TqdmConsole:
|
||||
"""Wrapper to log messages in a way that is compatible with tqdm progress bar
|
||||
|
||||
This routes log messages through tqdm so that it can print them above the
|
||||
progress bar, and then refresh the progress bar, rather than overwriting
|
||||
it which looks messy.
|
||||
|
||||
For some reason Python 3.6 prints extra empty messages from time to time,
|
||||
so we suppress those.
|
||||
"""
|
||||
|
||||
def __init__(self, file):
|
||||
self.file = file
|
||||
self.py36 = sys.version_info[0:2] == (3, 6)
|
||||
|
||||
def write(self, msg):
|
||||
# When no progress bar is active, tqdm.write() routes to print()
|
||||
if self.py36:
|
||||
if msg.strip() != '':
|
||||
tqdm.write(msg.rstrip(), end='\n', file=self.file)
|
||||
else:
|
||||
tqdm.write(msg.rstrip(), end='\n', file=self.file)
|
||||
|
||||
def flush(self):
|
||||
with suppress(AttributeError):
|
||||
self.file.flush()
|
||||
@@ -1,836 +0,0 @@
|
||||
# © 2016 James R. Barlow: github.com/jbarlow83
|
||||
#
|
||||
# This file is part of OCRmyPDF.
|
||||
#
|
||||
# OCRmyPDF is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# OCRmyPDF is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with OCRmyPDF. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
import logging
|
||||
import os
|
||||
import re
|
||||
import sys
|
||||
from contextlib import suppress
|
||||
from datetime import datetime, timezone
|
||||
from pathlib import Path
|
||||
from shutil import copyfileobj
|
||||
from typing import BinaryIO, Dict, Iterable, Optional, Union, cast
|
||||
|
||||
import img2pdf
|
||||
import pikepdf
|
||||
from pikepdf.models.metadata import encode_pdf_date
|
||||
from PIL import Image, ImageColor, ImageDraw
|
||||
|
||||
from ocrmypdf import leptonica
|
||||
from ocrmypdf._exec import unpaper
|
||||
from ocrmypdf._jobcontext import PageContext, PdfContext
|
||||
from ocrmypdf._version import PROGRAM_NAME
|
||||
from ocrmypdf._version import __version__ as VERSION
|
||||
from ocrmypdf.exceptions import (
|
||||
DpiError,
|
||||
EncryptedPdfError,
|
||||
InputFileError,
|
||||
PriorOcrFoundError,
|
||||
UnsupportedImageFormatError,
|
||||
)
|
||||
from ocrmypdf.helpers import Resolution, safe_symlink
|
||||
from ocrmypdf.hocrtransform import HocrTransform
|
||||
from ocrmypdf.optimize import optimize
|
||||
from ocrmypdf.pdfa import generate_pdfa_ps
|
||||
from ocrmypdf.pdfinfo import Colorspace, Encoding, PdfInfo
|
||||
|
||||
log = logging.getLogger(__name__)
|
||||
|
||||
VECTOR_PAGE_DPI = 400
|
||||
|
||||
|
||||
def triage_image_file(input_file, output_file, options):
|
||||
log.info("Input file is not a PDF, checking if it is an image...")
|
||||
try:
|
||||
im = Image.open(input_file)
|
||||
except EnvironmentError as e:
|
||||
# Recover the original filename
|
||||
log.error(str(e).replace(str(input_file), str(options.input_file)))
|
||||
raise UnsupportedImageFormatError() from e
|
||||
|
||||
with im:
|
||||
log.info("Input file is an image")
|
||||
if 'dpi' in im.info:
|
||||
if im.info['dpi'] <= (96, 96) and not options.image_dpi:
|
||||
log.info("Image size: (%d, %d)", *im.size)
|
||||
log.info("Image resolution: (%d, %d)", *im.info['dpi'])
|
||||
log.error(
|
||||
"Input file is an image, but the resolution (DPI) is "
|
||||
"not credible. Estimate the resolution at which the "
|
||||
"image was scanned and specify it using --image-dpi."
|
||||
)
|
||||
raise DpiError()
|
||||
elif not options.image_dpi:
|
||||
log.info("Image size: (%d, %d)", *im.size)
|
||||
log.error(
|
||||
"Input file is an image, but has no resolution (DPI) "
|
||||
"in its metadata. Estimate the resolution at which "
|
||||
"image was scanned and specify it using --image-dpi."
|
||||
)
|
||||
raise DpiError()
|
||||
|
||||
if im.mode in ('RGBA', 'LA'):
|
||||
log.error(
|
||||
"The input image has an alpha channel. Remove the alpha "
|
||||
"channel first."
|
||||
)
|
||||
raise UnsupportedImageFormatError()
|
||||
|
||||
if 'iccprofile' not in im.info:
|
||||
if im.mode == 'RGB':
|
||||
log.info("Input image has no ICC profile, assuming sRGB")
|
||||
elif im.mode == 'CMYK':
|
||||
log.error("Input CMYK image has no ICC profile, not usable")
|
||||
raise UnsupportedImageFormatError()
|
||||
|
||||
try:
|
||||
log.info("Image seems valid. Try converting to PDF...")
|
||||
layout_fun = img2pdf.default_layout_fun
|
||||
if options.image_dpi:
|
||||
layout_fun = img2pdf.get_fixed_dpi_layout_fun(
|
||||
Resolution(options.image_dpi, options.image_dpi)
|
||||
)
|
||||
with open(output_file, 'wb') as outf:
|
||||
img2pdf.convert(
|
||||
os.fspath(input_file),
|
||||
layout_fun=layout_fun,
|
||||
with_pdfrw=False,
|
||||
outputstream=outf,
|
||||
)
|
||||
log.info("Successfully converted to PDF, processing...")
|
||||
except img2pdf.ImageOpenError as e:
|
||||
log.error(e)
|
||||
raise UnsupportedImageFormatError() from e
|
||||
|
||||
|
||||
def _pdf_guess_version(input_file, search_window=1024):
|
||||
"""Try to find version signature at start of file.
|
||||
|
||||
Not robust enough to deal with appended files.
|
||||
|
||||
Returns empty string if not found, indicating file is probably not PDF.
|
||||
"""
|
||||
|
||||
with open(input_file, 'rb') as f:
|
||||
signature = f.read(search_window)
|
||||
m = re.search(br'%PDF-(\d\.\d)', signature)
|
||||
if m:
|
||||
return m.group(1)
|
||||
return ''
|
||||
|
||||
|
||||
def triage(original_filename, input_file, output_file, options):
|
||||
try:
|
||||
if _pdf_guess_version(input_file):
|
||||
if options.image_dpi:
|
||||
log.warning(
|
||||
"Argument --image-dpi is being ignored because the "
|
||||
"input file is a PDF, not an image."
|
||||
)
|
||||
# Origin file is a pdf create a symlink with pdf extension
|
||||
safe_symlink(input_file, output_file)
|
||||
return output_file
|
||||
except EnvironmentError as e:
|
||||
log.debug(f"Temporary file was at: {input_file}")
|
||||
msg = str(e).replace(str(input_file), original_filename)
|
||||
raise InputFileError(msg) from e
|
||||
|
||||
triage_image_file(input_file, output_file, options)
|
||||
return output_file
|
||||
|
||||
|
||||
def get_pdfinfo(
|
||||
input_file,
|
||||
detailed_analysis=False,
|
||||
progbar=False,
|
||||
max_workers=None,
|
||||
check_pages=None,
|
||||
):
|
||||
try:
|
||||
return PdfInfo(
|
||||
input_file,
|
||||
detailed_analysis=detailed_analysis,
|
||||
progbar=progbar,
|
||||
max_workers=max_workers,
|
||||
check_pages=check_pages,
|
||||
)
|
||||
except pikepdf.PasswordError:
|
||||
raise EncryptedPdfError()
|
||||
except pikepdf.PdfError:
|
||||
raise InputFileError()
|
||||
|
||||
|
||||
def validate_pdfinfo_options(context: PdfContext):
|
||||
pdfinfo = context.pdfinfo
|
||||
options = context.options
|
||||
|
||||
if pdfinfo.needs_rendering:
|
||||
log.error(
|
||||
"This PDF contains dynamic XFA forms created by Adobe LiveCycle "
|
||||
"Designer and can only be read by Adobe Acrobat or Adobe Reader."
|
||||
)
|
||||
raise InputFileError()
|
||||
if pdfinfo.has_userunit and options.output_type.startswith('pdfa'):
|
||||
log.error(
|
||||
"This input file uses a PDF feature that is not supported "
|
||||
"by Ghostscript, so you cannot use --output-type=pdfa for this "
|
||||
"file. (Specifically, it uses the PDF-1.6 /UserUnit feature to "
|
||||
"support very large or small page sizes, and Ghostscript cannot "
|
||||
"output these files.) Use --output-type=pdf instead."
|
||||
)
|
||||
raise InputFileError()
|
||||
if pdfinfo.has_acroform:
|
||||
if options.redo_ocr:
|
||||
log.error(
|
||||
"This PDF has a user fillable form. --redo-ocr is not "
|
||||
"currently possible on such files."
|
||||
)
|
||||
raise InputFileError()
|
||||
else:
|
||||
log.warning(
|
||||
"This PDF has a fillable form. "
|
||||
"Chances are it is a pure digital "
|
||||
"document that does not need OCR."
|
||||
)
|
||||
if not options.force_ocr:
|
||||
log.info(
|
||||
"Use the option --force-ocr to produce an image of the "
|
||||
"form and all filled form fields. The output PDF will be "
|
||||
"'flattened' and will no longer be fillable."
|
||||
)
|
||||
context.plugin_manager.hook.validate(pdfinfo=pdfinfo, options=options)
|
||||
|
||||
|
||||
def get_page_dpi(pageinfo, options):
|
||||
"Get the DPI when nonsquare DPI is tolerable"
|
||||
xres = max(
|
||||
pageinfo.dpi.x or VECTOR_PAGE_DPI,
|
||||
options.oversample or 0.0,
|
||||
VECTOR_PAGE_DPI if pageinfo.has_vector else 0.0,
|
||||
)
|
||||
yres = max(
|
||||
pageinfo.dpi.y or VECTOR_PAGE_DPI,
|
||||
options.oversample or 0,
|
||||
VECTOR_PAGE_DPI if pageinfo.has_vector else 0.0,
|
||||
)
|
||||
return Resolution(float(xres), float(yres))
|
||||
|
||||
|
||||
def get_page_square_dpi(pageinfo, options) -> Resolution:
|
||||
"Get the DPI when we require xres == yres, scaled to physical units"
|
||||
xres = pageinfo.dpi.x or 0.0
|
||||
yres = pageinfo.dpi.y or 0.0
|
||||
userunit = float(pageinfo.userunit) or 1.0
|
||||
units = float(
|
||||
max(
|
||||
(xres * userunit) or VECTOR_PAGE_DPI,
|
||||
(yres * userunit) or VECTOR_PAGE_DPI,
|
||||
VECTOR_PAGE_DPI if pageinfo.has_vector else 0.0,
|
||||
options.oversample or 0.0,
|
||||
)
|
||||
)
|
||||
return Resolution(units, units)
|
||||
|
||||
|
||||
def get_canvas_square_dpi(pageinfo, options) -> Resolution:
|
||||
"""Get the DPI when we require xres == yres, in Postscript units"""
|
||||
units = float(
|
||||
max(
|
||||
(pageinfo.dpi.x) or VECTOR_PAGE_DPI,
|
||||
(pageinfo.dpi.y) or VECTOR_PAGE_DPI,
|
||||
VECTOR_PAGE_DPI if pageinfo.has_vector else 0.0,
|
||||
options.oversample or 0.0,
|
||||
)
|
||||
)
|
||||
return Resolution(units, units)
|
||||
|
||||
|
||||
def is_ocr_required(page_context: PageContext):
|
||||
pageinfo = page_context.pageinfo
|
||||
options = page_context.options
|
||||
|
||||
ocr_required = True
|
||||
|
||||
if options.pages and pageinfo.pageno not in options.pages:
|
||||
log.debug(f"skipped {pageinfo.pageno} as requested by --pages {options.pages}")
|
||||
ocr_required = False
|
||||
elif pageinfo.has_text:
|
||||
if not options.force_ocr and not (options.skip_text or options.redo_ocr):
|
||||
raise PriorOcrFoundError(
|
||||
"page already has text! - aborting (use --force-ocr to force OCR; "
|
||||
" see also help for the arguments --skip-text and --redo-ocr"
|
||||
)
|
||||
elif options.force_ocr:
|
||||
log.info("page already has text! - rasterizing text and running OCR anyway")
|
||||
ocr_required = True
|
||||
elif options.redo_ocr:
|
||||
if pageinfo.has_corrupt_text:
|
||||
log.warning(
|
||||
"some text on this page cannot be mapped to characters: "
|
||||
"consider using --force-ocr instead"
|
||||
)
|
||||
else:
|
||||
log.info("redoing OCR")
|
||||
ocr_required = True
|
||||
elif options.skip_text:
|
||||
log.info("skipping all processing on this page")
|
||||
ocr_required = False
|
||||
elif not pageinfo.images and not options.lossless_reconstruction:
|
||||
# We found a page with no images and no text. That means it may
|
||||
# have vector art that the user wants to OCR. If we determined
|
||||
# lossless reconstruction is not possible then we have to rasterize
|
||||
# the image. So if OCR is being forced, take that to mean YES, go
|
||||
# ahead and rasterize. If not forced, then pretend there's no text
|
||||
# on the page at all so we don't lose anything.
|
||||
# This could be made smarter by explicitly searching for vector art.
|
||||
if options.force_ocr and options.oversample:
|
||||
# The user really wants to reprocess this file
|
||||
log.info(
|
||||
"page has no images - "
|
||||
f"rasterizing at {options.oversample} DPI because "
|
||||
"--force-ocr --oversample was specified"
|
||||
)
|
||||
elif options.force_ocr:
|
||||
# Warn the user they might not want to do this
|
||||
log.warning(
|
||||
"page has no images - "
|
||||
"all vector content will be "
|
||||
f"rasterized at {VECTOR_PAGE_DPI} DPI, losing some resolution and likely "
|
||||
"increasing file size. Use --oversample to adjust the "
|
||||
"DPI."
|
||||
)
|
||||
else:
|
||||
log.info(
|
||||
"page has no images - "
|
||||
"skipping all processing on this page to avoid losing detail. "
|
||||
"Use --force-ocr if you wish to perform OCR on pages that "
|
||||
"have vector content."
|
||||
)
|
||||
ocr_required = False
|
||||
|
||||
if ocr_required and options.skip_big and pageinfo.images:
|
||||
pixel_count = pageinfo.width_pixels * pageinfo.height_pixels
|
||||
if pixel_count > (options.skip_big * 1_000_000):
|
||||
ocr_required = False
|
||||
log.warning(
|
||||
"page too big, skipping OCR "
|
||||
f"({(pixel_count / 1_000_000):.1f} MPixels > {options.skip_big:.1f} MPixels --skip-big)"
|
||||
)
|
||||
return ocr_required
|
||||
|
||||
|
||||
def rasterize_preview(input_file: Path, page_context: PageContext):
|
||||
output_file = page_context.get_path('rasterize_preview.jpg')
|
||||
canvas_dpi = get_canvas_square_dpi(page_context.pageinfo, page_context.options)
|
||||
page_dpi = get_page_square_dpi(page_context.pageinfo, page_context.options)
|
||||
page_context.plugin_manager.hook.rasterize_pdf_page(
|
||||
input_file=input_file,
|
||||
output_file=output_file,
|
||||
raster_device='jpeggray',
|
||||
raster_dpi=canvas_dpi,
|
||||
page_dpi=page_dpi,
|
||||
pageno=page_context.pageinfo.pageno + 1,
|
||||
)
|
||||
return output_file
|
||||
|
||||
|
||||
def describe_rotation(page_context: PageContext, orient_conf, correction: int):
|
||||
"""
|
||||
Describe the page rotation we are going to perform.
|
||||
"""
|
||||
direction = {0: '⇧', 90: '⇨', 180: '⇩', 270: '⇦'}
|
||||
turns = {0: ' ', 90: '⬏', 180: '↻', 270: '⬑'}
|
||||
|
||||
existing_rotation = page_context.pageinfo.rotation
|
||||
action = ''
|
||||
if orient_conf.confidence >= page_context.options.rotate_pages_threshold:
|
||||
if correction != 0:
|
||||
action = 'will rotate ' + turns[correction]
|
||||
else:
|
||||
action = 'rotation appears correct'
|
||||
else:
|
||||
if correction != 0:
|
||||
action = 'confidence too low to rotate'
|
||||
else:
|
||||
action = 'no change'
|
||||
|
||||
facing = ''
|
||||
|
||||
if existing_rotation != 0:
|
||||
facing = f"with existing rotation {direction.get(existing_rotation, '?')}, "
|
||||
facing += f"page is facing {direction.get(orient_conf.angle, '?')}"
|
||||
|
||||
return f"{facing}, confidence {orient_conf.confidence:.2f} - {action}"
|
||||
|
||||
|
||||
def get_orientation_correction(preview: Path, page_context: PageContext):
|
||||
"""Work out orientation correct for each page.
|
||||
|
||||
We ask Ghostscript to draw a preview page, which will rasterize with the
|
||||
current /Rotate applied, and then ask OCR which way the page is
|
||||
oriented. If the value of /Rotate is correct (e.g., a user already
|
||||
manually fixed rotation), then OCR will say the page is pointing
|
||||
up and the correction is zero. Otherwise, the orientation found by
|
||||
OCR represents the clockwise rotation, or the counterclockwise
|
||||
correction to rotation.
|
||||
|
||||
When we draw the real page for OCR, we rotate it by the CCW correction,
|
||||
which points it (hopefully) upright. _graft.py takes care of the orienting
|
||||
the image and text layers.
|
||||
"""
|
||||
|
||||
orient_conf = page_context.plugin_manager.hook.get_ocr_engine().get_orientation(
|
||||
preview, page_context.options
|
||||
)
|
||||
|
||||
correction = orient_conf.angle % 360
|
||||
log.info(describe_rotation(page_context, orient_conf, correction))
|
||||
if (
|
||||
orient_conf.confidence >= page_context.options.rotate_pages_threshold
|
||||
and correction != 0
|
||||
):
|
||||
return correction
|
||||
|
||||
return 0
|
||||
|
||||
|
||||
def rasterize(
|
||||
input_file: Path,
|
||||
page_context: PageContext,
|
||||
correction: int = 0,
|
||||
output_tag: str = '',
|
||||
remove_vectors=None,
|
||||
):
|
||||
colorspaces = ['pngmono', 'pnggray', 'png256', 'png16m']
|
||||
device_idx = 0
|
||||
|
||||
if remove_vectors is None:
|
||||
remove_vectors = page_context.options.remove_vectors
|
||||
|
||||
output_file = page_context.get_path(f'rasterize{output_tag}.png')
|
||||
pageinfo = page_context.pageinfo
|
||||
|
||||
def at_least(cs):
|
||||
return max(device_idx, colorspaces.index(cs))
|
||||
|
||||
for image in pageinfo.images:
|
||||
if image.type_ != 'image':
|
||||
continue # ignore masks
|
||||
if image.bpc > 1:
|
||||
if image.color == Colorspace.index:
|
||||
device_idx = at_least('png256')
|
||||
elif image.color == Colorspace.gray:
|
||||
device_idx = at_least('pnggray')
|
||||
else:
|
||||
device_idx = at_least('png16m')
|
||||
|
||||
if pageinfo.has_vector:
|
||||
device_idx = at_least('png16m')
|
||||
|
||||
device = colorspaces[device_idx]
|
||||
|
||||
log.debug(f"Rasterize with {device}")
|
||||
|
||||
# Produce the page image with square resolution or else deskew and OCR
|
||||
# will not work properly.
|
||||
canvas_dpi = get_canvas_square_dpi(pageinfo, page_context.options)
|
||||
page_dpi = get_page_square_dpi(pageinfo, page_context.options)
|
||||
|
||||
page_context.plugin_manager.hook.rasterize_pdf_page(
|
||||
input_file=input_file,
|
||||
output_file=output_file,
|
||||
raster_device=device,
|
||||
raster_dpi=canvas_dpi,
|
||||
page_dpi=page_dpi,
|
||||
pageno=pageinfo.pageno + 1,
|
||||
rotation=correction,
|
||||
filter_vector=remove_vectors,
|
||||
)
|
||||
return output_file
|
||||
|
||||
|
||||
def preprocess_remove_background(input_file: Path, page_context: PageContext):
|
||||
if any(image.bpc > 1 for image in page_context.pageinfo.images):
|
||||
output_file = page_context.get_path('pp_rm_bg.png')
|
||||
leptonica.remove_background(input_file, output_file)
|
||||
return output_file
|
||||
else:
|
||||
log.info("background removal skipped on mono page")
|
||||
return input_file
|
||||
|
||||
|
||||
def preprocess_deskew(input_file: Path, page_context: PageContext):
|
||||
output_file = page_context.get_path('pp_deskew.png')
|
||||
dpi = get_page_square_dpi(page_context.pageinfo, page_context.options)
|
||||
leptonica.deskew(input_file, output_file, dpi.x)
|
||||
return output_file
|
||||
|
||||
|
||||
def preprocess_clean(input_file: Path, page_context: PageContext):
|
||||
output_file = page_context.get_path('pp_clean.png')
|
||||
dpi = get_page_square_dpi(page_context.pageinfo, page_context.options)
|
||||
unpaper.clean(input_file, output_file, dpi.x, page_context.options.unpaper_args)
|
||||
return output_file
|
||||
|
||||
|
||||
def create_ocr_image(image: Path, page_context: PageContext):
|
||||
"""Create the image we send for OCR. May not be the same as the display
|
||||
image depending on preprocessing. This image will never be shown to the
|
||||
user."""
|
||||
|
||||
output_file = page_context.get_path('ocr.png')
|
||||
options = page_context.options
|
||||
with Image.open(image) as im:
|
||||
white = ImageColor.getcolor('#ffffff', im.mode)
|
||||
# pink = ImageColor.getcolor('#ff0080', im.mode)
|
||||
draw = ImageDraw.ImageDraw(im)
|
||||
|
||||
log.debug('resolution %r', im.info['dpi'])
|
||||
|
||||
if not options.force_ocr:
|
||||
# Do not mask text areas when forcing OCR, because we need to OCR
|
||||
# all text areas
|
||||
mask = None # Exclude both visible and invisible text from OCR
|
||||
if options.redo_ocr:
|
||||
mask = True # Mask visible text, but not invisible text
|
||||
|
||||
for textarea in page_context.pageinfo.get_textareas(
|
||||
visible=mask, corrupt=None
|
||||
):
|
||||
# Calculate resolution based on the image size and page dimensions
|
||||
# without regard whatever resolution is in pageinfo (may differ or
|
||||
# be None)
|
||||
bbox = [float(v) for v in textarea]
|
||||
xyscale = tuple(float(coord) / 72.0 for coord in im.info['dpi'])
|
||||
pixcoords = [
|
||||
bbox[0] * xyscale[0],
|
||||
im.height - bbox[3] * xyscale[1],
|
||||
bbox[2] * xyscale[0],
|
||||
im.height - bbox[1] * xyscale[1],
|
||||
]
|
||||
pixcoords = [int(round(c)) for c in pixcoords]
|
||||
log.debug('blanking %r', pixcoords)
|
||||
draw.rectangle(pixcoords, fill=white)
|
||||
# draw.rectangle(pixcoords, outline=pink)
|
||||
|
||||
if options.threshold:
|
||||
pix = leptonica.Pix.frompil(im)
|
||||
pix = pix.masked_threshold_on_background_norm()
|
||||
im = pix.topil()
|
||||
|
||||
del draw
|
||||
|
||||
filter_im = page_context.plugin_manager.hook.filter_ocr_image(
|
||||
page=page_context, image=im
|
||||
)
|
||||
if filter_im is not None:
|
||||
im = filter_im
|
||||
|
||||
# Pillow requires integer DPI
|
||||
dpi = tuple(round(coord) for coord in im.info['dpi'])
|
||||
im.save(output_file, dpi=dpi)
|
||||
return output_file
|
||||
|
||||
|
||||
def ocr_engine_hocr(input_file: Path, page_context: PageContext):
|
||||
hocr_out = page_context.get_path('ocr_hocr.hocr')
|
||||
hocr_text_out = page_context.get_path('ocr_hocr.txt')
|
||||
options = page_context.options
|
||||
|
||||
ocr_engine = page_context.plugin_manager.hook.get_ocr_engine()
|
||||
ocr_engine.generate_hocr(
|
||||
input_file=input_file,
|
||||
output_hocr=hocr_out,
|
||||
output_text=hocr_text_out,
|
||||
options=options,
|
||||
)
|
||||
return (hocr_out, hocr_text_out)
|
||||
|
||||
|
||||
def should_visible_page_image_use_jpg(pageinfo):
|
||||
# If all images were JPEGs originally, produce a JPEG as output
|
||||
return pageinfo.images and all(im.enc == Encoding.jpeg for im in pageinfo.images)
|
||||
|
||||
|
||||
def create_visible_page_jpg(image: Path, page_context: PageContext) -> Path:
|
||||
output_file = page_context.get_path('visible.jpg')
|
||||
with Image.open(image) as im:
|
||||
# At this point the image should be a .png, but deskew, unpaper
|
||||
# might have removed the DPI information. In this case, fall back to
|
||||
# square DPI used to rasterize. When the preview image was
|
||||
# rasterized, it was also converted to square resolution, which is
|
||||
# what we want to give to the OCR engine, so keep it square.
|
||||
if 'dpi' in im.info:
|
||||
dpi = Resolution(*im.info['dpi'])
|
||||
else:
|
||||
# Fallback to page-implied DPI
|
||||
dpi = get_page_square_dpi(page_context.pageinfo, page_context.options)
|
||||
|
||||
# Pillow requires integer DPI
|
||||
im.save(output_file, format='JPEG', dpi=dpi.to_int())
|
||||
return output_file
|
||||
|
||||
|
||||
def create_pdf_page_from_image(image: Path, page_context: PageContext):
|
||||
# We rasterize a square DPI version of each page because most image
|
||||
# processing tools don't support rectangular DPI. Use the square DPI as it
|
||||
# accurately describes the image. It would be possible to resample the image
|
||||
# at this stage back to non-square DPI to more closely resemble the input,
|
||||
# except that the hocr renderer does not understand non-square DPI. The
|
||||
# sandwich renderer would be fine.
|
||||
output_file = page_context.get_path('visible.pdf')
|
||||
dpi = get_page_square_dpi(page_context.pageinfo, page_context.options)
|
||||
layout_fun = img2pdf.get_fixed_dpi_layout_fun(dpi)
|
||||
|
||||
# This create a single page PDF
|
||||
with open(image, 'rb') as imfile, open(output_file, 'wb') as pdf:
|
||||
log.debug('convert')
|
||||
img2pdf.convert(
|
||||
imfile, with_pdfrw=False, layout_fun=layout_fun, outputstream=pdf
|
||||
)
|
||||
log.debug('convert done')
|
||||
return output_file
|
||||
|
||||
|
||||
def render_hocr_page(hocr: Path, page_context: PageContext):
|
||||
output_file = page_context.get_path('ocr_hocr.pdf')
|
||||
dpi = get_page_square_dpi(page_context.pageinfo, page_context.options)
|
||||
hocrtransform = HocrTransform(hocr, dpi.x) # square
|
||||
hocrtransform.to_pdf(
|
||||
output_file,
|
||||
image_filename=None,
|
||||
show_bounding_boxes=False,
|
||||
invisible_text=True,
|
||||
interword_spaces=True,
|
||||
)
|
||||
return output_file
|
||||
|
||||
|
||||
def ocr_engine_textonly_pdf(input_image: Path, page_context: PageContext):
|
||||
output_pdf = page_context.get_path('ocr_tess.pdf')
|
||||
output_text = page_context.get_path('ocr_tess.txt')
|
||||
options = page_context.options
|
||||
|
||||
ocr_engine = page_context.plugin_manager.hook.get_ocr_engine()
|
||||
ocr_engine.generate_pdf(
|
||||
input_file=input_image,
|
||||
output_pdf=output_pdf,
|
||||
output_text=output_text,
|
||||
options=options,
|
||||
)
|
||||
return (output_pdf, output_text)
|
||||
|
||||
|
||||
def get_docinfo(base_pdf: pikepdf.Pdf, context: PdfContext) -> Dict[str, str]:
|
||||
options = context.options
|
||||
|
||||
def from_document_info(key):
|
||||
try:
|
||||
s = base_pdf.docinfo[key]
|
||||
return str(s)
|
||||
except (KeyError, TypeError):
|
||||
return ''
|
||||
|
||||
pdfmark = {
|
||||
k: from_document_info(k)
|
||||
for k in ('/Title', '/Author', '/Keywords', '/Subject', '/CreationDate')
|
||||
}
|
||||
if options is not None:
|
||||
if options.title:
|
||||
pdfmark['/Title'] = options.title
|
||||
if options.author:
|
||||
pdfmark['/Author'] = options.author
|
||||
if options.keywords:
|
||||
pdfmark['/Keywords'] = options.keywords
|
||||
if options.subject:
|
||||
pdfmark['/Subject'] = options.subject
|
||||
|
||||
creator_tag = context.plugin_manager.hook.get_ocr_engine().creator_tag(options)
|
||||
|
||||
pdfmark['/Creator'] = f'{PROGRAM_NAME} {VERSION} / {creator_tag}'
|
||||
pdfmark['/Producer'] = f'pikepdf {pikepdf.__version__}'
|
||||
if 'OCRMYPDF_CREATOR' in os.environ:
|
||||
pdfmark['/Creator'] = os.environ['OCRMYPDF_CREATOR']
|
||||
if 'OCRMYPDF_PRODUCER' in os.environ:
|
||||
pdfmark['/Producer'] = os.environ['OCRMYPDF_PRODUCER']
|
||||
|
||||
pdfmark['/ModDate'] = encode_pdf_date(datetime.now(timezone.utc))
|
||||
return pdfmark
|
||||
|
||||
|
||||
def generate_postscript_stub(context: PdfContext):
|
||||
output_file = context.get_path('pdfa.ps')
|
||||
generate_pdfa_ps(output_file)
|
||||
return output_file
|
||||
|
||||
|
||||
def convert_to_pdfa(input_pdf: Path, input_ps_stub: Path, context: PdfContext):
|
||||
options = context.options
|
||||
input_pdfinfo = context.pdfinfo
|
||||
fix_docinfo_file = context.get_path('fix_docinfo.pdf')
|
||||
output_file = context.get_path('pdfa.pdf')
|
||||
|
||||
# If the DocumentInfo record contains NUL characters, Ghostscript will
|
||||
# produce XMP metadata which contains invalid XML entities (�).
|
||||
# NULs in DocumentInfo seem to be common since older Acrobats included them.
|
||||
# pikepdf can deal with this, but we make the world a better place by
|
||||
# stamping them out as soon as possible.
|
||||
modified = False
|
||||
with pikepdf.open(input_pdf) as pdf_file:
|
||||
try:
|
||||
len(pdf_file.docinfo)
|
||||
except TypeError:
|
||||
log.error(
|
||||
"File contains a malformed DocumentInfo block - continuing anyway"
|
||||
)
|
||||
else:
|
||||
if pdf_file.docinfo:
|
||||
for k, v in pdf_file.docinfo.items():
|
||||
if b'\x00' in bytes(v):
|
||||
pdf_file.docinfo[k] = bytes(v).replace(b'\x00', b'')
|
||||
modified = True
|
||||
if modified:
|
||||
pdf_file.save(fix_docinfo_file)
|
||||
else:
|
||||
safe_symlink(input_pdf, fix_docinfo_file)
|
||||
|
||||
context.plugin_manager.hook.generate_pdfa(
|
||||
pdf_version=input_pdfinfo.min_version,
|
||||
pdf_pages=[fix_docinfo_file],
|
||||
pdfmark=input_ps_stub,
|
||||
output_file=output_file,
|
||||
compression=options.pdfa_image_compression,
|
||||
pdfa_part=options.output_type[-1], # is pdfa-1, pdfa-2, or pdfa-3
|
||||
)
|
||||
|
||||
return output_file
|
||||
|
||||
|
||||
def should_linearize(working_file: Path, context: PdfContext):
|
||||
filesize = os.stat(working_file).st_size
|
||||
if filesize > (context.options.fast_web_view * 1_000_000):
|
||||
return True
|
||||
return False
|
||||
|
||||
|
||||
def metadata_fixup(working_file: Path, context: PdfContext):
|
||||
output_file = context.get_path('metafix.pdf')
|
||||
options = context.options
|
||||
|
||||
def report_on_metadata(missing):
|
||||
if not missing:
|
||||
return
|
||||
if options.output_type.startswith('pdfa'):
|
||||
log.warning(
|
||||
"Some input metadata could not be copied because it is not "
|
||||
"permitted in PDF/A. You may wish to examine the output "
|
||||
"PDF's XMP metadata."
|
||||
)
|
||||
log.debug("The following metadata fields were not copied: %r", missing)
|
||||
else:
|
||||
log.error(
|
||||
"Some input metadata could not be copied."
|
||||
"You may wish to examine the output PDF's XMP metadata."
|
||||
)
|
||||
log.info("The following metadata fields were not copied: %r", missing)
|
||||
|
||||
with pikepdf.open(context.origin) as original, pikepdf.open(working_file) as pdf:
|
||||
docinfo = get_docinfo(original, context)
|
||||
with pdf.open_metadata() as meta:
|
||||
meta.load_from_docinfo(docinfo, delete_missing=False, raise_failure=False)
|
||||
# If xmp:CreateDate is missing, set it to the modify date to
|
||||
# match Ghostscript, for consistency
|
||||
if 'xmp:CreateDate' not in meta:
|
||||
meta['xmp:CreateDate'] = meta.get('xmp:ModifyDate', '')
|
||||
|
||||
# Ghostscript likes to set title to Untitled if omitted from input.
|
||||
# Reverse this, because PDF/A TechNote 0003:Metadata in PDF/A-1
|
||||
# and the XMP Spec do not make this recommendation.
|
||||
if meta.get('dc:title') == 'Untitled':
|
||||
with original.open_metadata() as original_meta:
|
||||
if 'dc:title' not in original_meta:
|
||||
del meta['dc:title']
|
||||
|
||||
meta_original = original.open_metadata()
|
||||
missing = set(meta_original.keys()) - set(meta.keys())
|
||||
report_on_metadata(missing)
|
||||
|
||||
pdf.save(
|
||||
output_file,
|
||||
compress_streams=True,
|
||||
preserve_pdfa=True,
|
||||
object_stream_mode=pikepdf.ObjectStreamMode.generate,
|
||||
linearize=( # Don't linearize if optimize() will be linearizing too
|
||||
should_linearize(working_file, context)
|
||||
if options.optimize == 0
|
||||
else False
|
||||
),
|
||||
)
|
||||
|
||||
return output_file
|
||||
|
||||
|
||||
def optimize_pdf(input_file: Path, context: PdfContext):
|
||||
output_file = context.get_path('optimize.pdf')
|
||||
save_settings = dict(
|
||||
compress_streams=True,
|
||||
preserve_pdfa=True,
|
||||
object_stream_mode=pikepdf.ObjectStreamMode.generate,
|
||||
linearize=should_linearize(input_file, context),
|
||||
)
|
||||
optimize(input_file, output_file, context, save_settings)
|
||||
return output_file
|
||||
|
||||
|
||||
def merge_sidecars(txt_files: Iterable[Optional[Path]], context: PdfContext):
|
||||
output_file = context.get_path('sidecar.txt')
|
||||
with open(output_file, 'w', encoding="utf-8") as stream:
|
||||
for page_num, txt_file in enumerate(txt_files):
|
||||
if page_num != 0:
|
||||
stream.write('\f') # Form feed between pages
|
||||
if txt_file:
|
||||
with open(txt_file, 'r', encoding="utf-8") as in_:
|
||||
txt = in_.read()
|
||||
# Some OCR engines (e.g. Tesseract v4 alpha) add form feeds
|
||||
# between pages, and some do not. For consistency, we ignore
|
||||
# any added by the OCR engine and them on our own.
|
||||
if txt.endswith('\f'):
|
||||
stream.write(txt[:-1])
|
||||
else:
|
||||
stream.write(txt)
|
||||
else:
|
||||
stream.write(f'[OCR skipped on page {(page_num + 1)}]')
|
||||
return output_file
|
||||
|
||||
|
||||
def copy_final(input_file, output_file, _context: PdfContext):
|
||||
log.debug('%s -> %s', input_file, output_file)
|
||||
with open(input_file, 'rb') as input_stream:
|
||||
if output_file == '-':
|
||||
copyfileobj(input_stream, sys.stdout.buffer)
|
||||
sys.stdout.flush()
|
||||
elif hasattr(output_file, 'writable'):
|
||||
output_stream = output_file
|
||||
copyfileobj(input_stream, output_stream)
|
||||
with suppress(AttributeError):
|
||||
output_stream.flush()
|
||||
else:
|
||||
# At this point we overwrite the output_file specified by the user
|
||||
# use copyfileobj because then we use open() to create the file and
|
||||
# get the appropriate umask, ownership, etc.
|
||||
with open(output_file, 'wb') as output_stream:
|
||||
copyfileobj(input_stream, output_stream)
|
||||
Some files were not shown because too many files have changed in this diff Show More
Reference in New Issue
Block a user