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560 Commits
Author SHA1 Message Date
James R. Barlow 5ac2d31d0d Redo OCR can now handle visible and invisible text, so adjust accordingly 
Still can't filter out corrupt text
 2018-10-28 14:06:25 -07:00
James R. Barlow fda890ab47 pdfinfo: further layout improvements 
Rather than grouping visible/invisible in a custom analysis step,
use pdfminer's analysis and iterate.
Make iteration predicate and return more generic.
 2018-10-28 14:05:50 -07:00
Stefan Weilandjbarlow83 a873278c2a Fix some recommendations from LGTM (#309) 
* Fix unreachable code

This fixes an issue reported by LGTM.

Signed-off-by: Stefan Weil <sw@weilnetz.de>

* Remove unused imports

This fixes several recommendations from LGTM.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
 2018-10-28 13:59:58 -07:00
James R. Barlow e6d64be890 pdfinfo: formatting 2018-10-27 23:22:44 -07:00
James R. Barlow 0e4d978d20 pdfinfo: all -> not any 2018-10-27 23:22:28 -07:00
James R. Barlow b12c2cfedf Fix handling of Type3 fonts with no ToUnicode mapping 2018-10-27 01:24:48 -07:00
James R. Barlow 58cc70725e Reorganize around getting bboxes for visible/invisible text 2018-10-26 01:07:02 -07:00
James R. Barlow 339afb02aa --redo-ocr now works in the presence of printable text 2018-10-25 16:53:47 -07:00
James R. Barlow 7ba0ff5c36 Fix strip invisible text bug: missing BT operator 2018-10-25 16:52:23 -07:00
James R. Barlow ff41fbf673 Add pdfminer based layout analysis 2018-10-25 12:42:35 -07:00
James R. Barlow 2435cd23ce Move pdfinfo into a package 2018-10-25 00:37:38 -07:00
James R. Barlow a063cff720 Rename/expose strip_invisible_text 2018-10-24 21:53:24 -07:00
James R. Barlow 0d396e1ac0 option check: Remove always-True condition 
Both renderers are now lossless reconstruction-capable. (Have
been since 7.0)
 2018-10-22 22:13:59 -07:00
James R. Barlow eb4938a36f Fix KeyError 'has_vector' 2018-10-20 01:20:22 -07:00
James R. Barlow c5ad530bbf pdfinfo: reminder about 'INLINE IMAGE' sentinel 2018-10-20 01:17:08 -07:00
James R. Barlow d11c428407 Redo OCR: disallow in cases that will damage the output PDF 2018-10-20 01:14:33 -07:00
James R. Barlow 6182b1f53e Merge branch 'feature/remove-vectors' into feature/redo-ocr 2018-10-20 01:13:24 -07:00
James R. Barlow 00fc1a12e2 optimize: should remove unreference resources too 2018-10-19 00:03:56 -07:00
James R. Barlow 16af753206 Add functional "redo OCR" feature 
Needs argument validation and some other changes. Needs testing
with mixed-content PDFs.

Only really works for pure invisible text at the moment.
 2018-10-19 00:02:19 -07:00
James R. Barlow fa48205bb8 Add feature to remove vector graphics objects 2018-10-18 21:46:08 -07:00
James R. Barlow f7dbf94071 pipeline: if vector graphic objects exist, ensure the DPI is reasonable 2018-10-18 01:23:31 -07:00
James R. Barlow b18e66e2ca pdfinfo: learn to detect vector graphic objects 2018-10-18 01:21:51 -07:00
James R. Barlow 7a5504dfa5 pdfinfo: fix terminology (operands, command) -> (operands, operator) 2018-10-18 01:18:30 -07:00
James R. Barlow 68bac1b177 Fix compatibility with pikepdf 0.3.5 API change 2018-10-11 15:51:34 -07:00
James R. Barlow 1495b78330 Remove cruft to support leptonica < 1.72 in test suite 2018-10-11 01:37:32 -07:00
James R. Barlow c1e18bb825 optimize: Exclude soft masks (SMasks) from optimization 
Soft masks are only allowed to be of colorspace DeviceGray so we
shouldn't use pngquant on them. For now, avoid this exceptional
case by excluded soft masks from optimization.
 2018-10-05 01:23:26 -07:00
James R. Barlow 58282ea0fb optimize: more refactoring 
Now properly generalized/specialized where it should be
 2018-10-04 13:44:51 -07:00
James R. Barlow 891da7834c optimize: refactor image extraction 2018-10-04 12:34:22 -07:00
James R. Barlow 5c229d48d5 optimize: Reorganize so JBIG2 can be performed on images reduced to 1bpp 
Closes #297
 2018-10-04 11:53:11 -07:00
James R. Barlow 5b84549716 Change JBIG2 lossy mode to require --jbig2-lossy 2018-10-04 01:20:49 -07:00
James R. Barlow c74f2ee6e8 Refactor the detailed error messages 2018-10-04 00:10:59 -07:00
James R. Barlow b32dd9f9d3 Fix lossless JBIG2 when there are multiple JBIG2 images on a single page 2018-10-03 17:40:26 -07:00
James R. Barlow fb8b161f6c Fix suppression of tesseract config error messages 2018-10-03 17:39:50 -07:00
James R. Barlow 6f554c6ae8 tesseract: account for behavior changes when params are missing 
Tesseract 4.0-rc1 now accepts invalid parameters in config and
won't return an error anymore. We prefer to raise an error if this
occurs.

See: https://github.com/tesseract-ocr/tesseract/commit/741ea00d7059d8ff7c55797ffc525a461d7f3ced
 2018-10-03 15:11:34 -07:00
James R. Barlow 72156b5653 Degrade more gracefully when --optimize is set but JBIG2 is not present 2018-10-03 14:24:20 -07:00
James R. Barlow 9a8ec4b210 optimize: only enable lossy JBIG2 for -O3 2018-10-03 00:38:58 -07:00
James R. Barlow 75aad4cc79 optimize: Refactor convert_to_jbig2 2018-10-02 23:42:12 -07:00
James R. Barlow 4b27feca98 optimize: Disable JBIG2 lossy mode, use lossless instead 2018-10-01 12:28:54 -07:00
James R. Barlow 45522cd15f weave: clarify comment about garbage data in ToC 2018-09-27 13:48:35 -07:00
James R. Barlow 677d9a4e76 Remove some unhelpful lambdas 2018-09-27 13:48:12 -07:00
James R. Barlow efa7ea4fde Fix log.error where log is None 2018-09-19 23:01:27 -07:00
James R. Barlow 137a6e45f5 ghostscript: fix missing fspath for py3.5 2018-09-19 22:57:20 -07:00
James R. Barlow cfd4f8a850 Improve error handling for improvements to Ghostscript text extraction 2018-09-19 20:29:18 -07:00
James R. Barlow ef70e538f7 Improve error message on handling KeyboardInterrupt 
Closes #301
 2018-09-19 01:40:26 -07:00
James R. Barlow b7b912e56a Fix test suite and blank pages 2018-09-17 01:12:58 -07:00
James R. Barlow 4615cf2f1e First cut at improving text extraction speed 2018-09-16 23:34:18 -07:00
James R. Barlow 96ba75eabd Ghostscript: fix issues in strict ASCII implementation 2018-09-16 15:41:54 -07:00
James R. Barlow fdfe52c1ad main: add debug option to force threads 2018-09-15 00:01:45 -07:00
James R. Barlow 932b2e2a29 main: print Ghostscript version too 2018-09-14 23:58:06 -07:00
James R. Barlow 57e489c957 main: Cleanup; support overriding sys.args in run_pipeline 2018-09-14 23:57:35 -07:00