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d48254d477c45402134dfa4683781739346bf336
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47 Commits
Author SHA1 Message Date
James R. Barlow d48254d477 Fix issue with attempting to deskew a blank page on Tesseract 5 
Closes #868
 2021-12-10 21:48:09 -08:00
James R. Barlow f91faf9795 Add new argument --tesseract-thresholding to control tesseract thresholding where available 
Also add missing test for --tesseract-oem
 2021-12-06 15:38:14 -08:00
James R. Barlow cfe2bb25ba Merge commit 'cd49e70154f82f54bf74fc5bb2586fe7e0358971' into release/v13 2021-11-15 00:33:34 -08:00
Tristan PorteriesandGitHub cd49e70154 ghostscript: force interpolation when rendering (#855) 
Specifying option --oversample tends to introduce upsampling in rendering
by rasterizing page to an higher DPI.

This upsampling improves OCR results, but a correct choice of interpolation
method can increase even more the OCR quality.

Ghostscript seems to use a nearest interpolation as default choice for pdf.
This method doesn't average new introduced pixels with original pixels
resulting in an almost similar image but with more pixels.

Providing -dInterpolateControl=-1 force switching interpolation on.

In this commit the above option is passed to all ghostscript rendering
calls.

After testing, rendering a page at same DPI with interpolation
enabled does not introduce significant time overhead.

time (repeat 40 gs -dQUIET -dSAFER -dBATCH -dNOPAUSE -sDEVICE=png16m \
	-dFirstPage=1 -dLastPage=1 -r100.000000x100.000000 \
	-dInterpolateControl=-1 -o /dev/null -dAutoRotatePages=/None -f pzII.pdf)
7,66s user 0,33s system 99% cpu 8,012 total

time (repeat 40 gs -dQUIET -dSAFER -dBATCH -dNOPAUSE -sDEVICE=png16m \
	-dFirstPage=1 -dLastPage=1 -r100.000000x100.000000 \
        -o /dev/null -dAutoRotatePages=/None -f pzII.pdf)
7,42s user 0,39s system 99% cpu 7,808 total

Ghostscript interpolation control reference:
https://www.ghostscript.com/doc/current/Use.htm
 2021-11-15 00:32:58 -08:00
James R. Barlow 7b3d7ca92a ghostscript: choco doesn't put Ghostscript on PATH anymore 
It seems that chocolately doesn't put gswin[32,64]c on PATH anymore,
so compensate.
 2021-11-13 01:18:12 -08:00
James R. Barlow e3126d2806 Adjust test to support Tesseract 5 working harder to find its files 2021-11-13 01:16:35 -08:00
James R. Barlow b159e02110 Convert deskew to use degrees, since all our other angles are in degrees 2021-11-12 16:40:51 -08:00
James R. Barlow a55ab05d16 Replace leptonica deskew with tesseract find skew and pillow rotate 
Also rebuild the cache.
 2021-11-12 16:35:08 -08:00
James R. Barlow 01b0f76e36 Remove duplicate definition of OrientationConfidence 2021-11-10 00:55:07 -08:00
James R. Barlow 6c34d59836 tesseract: yet another version variant 2021-11-04 00:17:18 -07:00
James R. Barlow 615a7561b5 tesseract: tidy some uses of str paths instead of Path 2021-10-31 02:01:05 -07:00
James R. Barlow c725bf79da flake8 delinting 2021-09-21 16:37:03 -07:00
James R. Barlow e402d5cb4b typing: fix path and numeric issues 2021-08-27 00:23:38 -07:00
James R. Barlow 4eca0a165b pre-commit: pyupgrade modernizing 2021-08-26 18:04:38 -07:00
James R. Barlow 5f01c5e330 Fix another species of Tesseract version number breaking regex 
Fixes #795
 2021-06-16 00:09:03 -07:00
James R. Barlow 7b1e5b4f41 Fix "invalid version number" for untagged tesseract versions 
Fixes #770
 2021-04-26 01:18:07 -07:00
James R. Barlow 336d274a54 Drop remnants of support for Tesseract without has_textonly_pdf 
Also improve Tesseract version checking so it can compare all of their
weird conventions.
 2021-04-07 23:05:21 -07:00
James R. Barlow ec1d585d40 Merge branch 'feature/misc-breaking' 2021-04-01 16:51:04 -07:00
James R. Barlow a4e1f8e1f3 Merge branch 'feature/lambda' 2021-04-01 16:36:22 -07:00
James R. Barlow bccf2f423f Stricter parameter checking for many public functions 2021-01-31 19:27:25 -08:00
James R. Barlow 327df5cbbc Use ColorConversionStrategy "LeaveColorUnchanged" 
Faster, still produces PDF/A
 2021-01-26 15:44:41 -08:00
James R. Barlow ef1e7a814e Delinting 2021-01-26 01:45:04 -08:00
James R. Barlow 6a8dd65aa2 lambda: more issues related to new executor semantics 
Now all tests pass, except for:
-tests that check the progress bar
-tests where xdist may or may not load a _lambda_plugin by running
some other test first before a test in optimize
 2021-01-24 23:46:40 -08:00
James R. Barlow 6f4b38b103 ghostscript: tidy comments 2021-01-08 00:41:03 -08:00
James R. Barlow 1e80d412fa tesseract: fix typing of some optional arguments 2021-01-01 00:46:00 -08:00
James R. Barlow 0ff0d2f8d1 Remove PDF/A overprint debug message 
Since we currently log all of a process's output at debug it's
redundant to log this separate message.
 2020-12-27 16:19:05 -08:00
James R. Barlow ce0e0ecd4d Decouple tqdm from progressbar setup 2020-12-04 13:20:28 -08:00
James R. Barlow 7e1223c12c ghostscript: add output tracing 2020-11-29 14:53:35 -08:00
James R. Barlow 80e957908a tesseract: fix run call with logs_errors_to_stdout 2020-11-29 14:25:46 -08:00
James R. Barlow 1f598da3c1 ghostscript: better docs and comments 2020-11-18 11:34:17 -08:00
James R. Barlow 5c56f61209 unpaper: type hints 2020-11-11 02:59:37 -08:00
James R. Barlow 895fddd85e Replace most uses of universal_newlines with text 
The parameters are equivalent but the latter is better named. Since
Python 3.6 doesn't support text= we use our wrapper to add it in that
place.

This is for subprocess.run.
 2020-11-07 00:48:08 -08:00
James R. Barlow 5a59e4d543 unpaper: don't use universal_newlines=True 
There's no specific reason to do this. We can log binary output equally
 well.
 2020-11-07 00:18:27 -08:00
James R. Barlow b913e5dfef ghostscript: don't repeat log in debug 
Subprocess already does this for us.
 2020-11-03 01:45:06 -08:00
James R. Barlow ced7ad9164 unpaper: round off DPI 2020-11-03 01:14:57 -08:00
James R. Barlow e86be0031c unpaper: fix process output handling 
With the ocrmypdf.subprocess wrapper, logging the output here
is redundant and loses the page number context.
 2020-11-02 01:07:41 -08:00
James R. Barlow 6425977998 unpaper: use pnm instead of png 
Some users reported problems with PNG recently; try PNM.

Fixes #665
Fixes #667
 2020-11-02 01:05:56 -08:00
James R. Barlow b5ccbfdf25 Fix hookspec of rasterize_pdf_page to remove default parameters 2020-10-24 02:35:18 -07:00
James R. Barlow 3ef8872a1e pngquant driver: refactor, use streams instead of temporary files 2020-09-25 00:18:02 -07:00
James R. Barlow 28eec73eed Tighten unpaper-args validation to exclude . and .. 
Just in case
 2020-09-25 00:18:02 -07:00
James R. Barlow aa0ec40102 Change license of all GPLv3 files to MPL-2.0 
https://github.com/jbarlow83/OCRmyPDF/issues/600
 2020-08-05 00:44:42 -07:00
James R. Barlow a510b21b20 optimize: add typing for Xref, remove fspath()'s 2020-07-09 14:06:41 -07:00
James R. Barlow 86875997b8 Fix more mypy errors 2020-06-29 02:17:14 -07:00
James R. Barlow e802896d4d unpaper: use PNG input where possible 
Unpaper accepts PNG as input now, so avoid generating a huge
temporary PPM file if we can. If we
must create a PNG, compress it lightly to keep our temp usage down.
 2020-06-16 00:50:18 -07:00
James R. Barlow 64891c2fc3 Pre-release delinting 2020-06-09 15:27:14 -07:00
James R. Barlow fe156db41d Merge branch 'release/v10' into trialmerge 2020-06-09 15:12:56 -07:00
James R. Barlow 0f942fb714 Rename ocrmypdf.exec -> ocrmypdf._exec 2020-06-09 14:59:09 -07:00