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514038d4ec2ce249d039a7fc9d1ef6023181e936
Commit Graph
994 Commits
Author SHA1 Message Date
James R. Barlow 514038d4ec optimize: recognize and produce [/FlateDecode /DCTDecode] images 2022-02-08 00:38:08 -08:00
James R. Barlow 50d76e7f6c optimize: remove comment about issue in Pillow that is now fixed 2022-02-07 22:18:20 -08:00
James R. Barlow 6c78a46285 optimize: remove inaccurate about ICCs 
pikepdf will now get the ICC profile out and put it in the JPEG.
 2022-02-07 19:42:13 -08:00
James R. Barlow 863d560632 optimize: clarify log message about skipping images with multiple filters 2022-02-06 22:41:10 -08:00
James R. Barlow 3dfde479e2 The world is not ready for := 2022-01-26 00:16:51 -08:00
James R. Barlow 3b406112d0 ghostscript: improve test coverage of error cases 2022-01-25 23:45:47 -08:00
James R. Barlow fcc4c2d371 ghostscript: improve error message if image cannot be opened 2022-01-25 23:12:51 -08:00
James R. Barlow 3de18ed612 tesseract: account for more tesseract 5 output differences 2022-01-25 00:19:49 -08:00
James R. Barlow 93cca42e20 optimize: don't try to optimize an image we can't save 2022-01-25 00:19:23 -08:00
James R. Barlow 2d0ac4707c Use better img2pdf settings where possible while supporting old versions 
Fixes #894
 2022-01-14 11:55:54 -08:00
James R. Barlow 7d208175cf unpaper: refactoring 2022-01-11 10:57:54 -08:00
James R. Barlow ea69e868ed unpaper: issue warning if image too large to clean 2022-01-11 10:44:38 -08:00
Anton GladkyandGitHub 5acbd7a252 Wrap exception on non-CMYK images into the log warning (#881) 2021-12-29 01:15:49 -08:00
Krasimir NedelchevandGitHub aed955ca8c Fix typo (#882) 2021-12-27 15:36:19 -08:00
James R. Barlow 1a58abcc6a concurrency: fix extra update of progressbar 2021-12-19 11:34:09 -08:00
James R. Barlow dbfceba020 Standardize ghostscript version default 2021-12-18 02:01:42 -08:00
James R. Barlow 0faa618c3c Replace deprecated distutils with packaging.version 2021-12-18 01:57:59 -08:00
James R. Barlow 7035002c03 Order of operations suppressed detailed Ghostscript missing error message 2021-12-18 01:27:39 -08:00
James R. Barlow f8fadaef41 _windows: remove use of deprecated distutils 2021-12-13 20:45:54 -08:00
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 6910c48b81 Fix test_outputtype_none on Windows and cleanup docs 2021-12-06 15:38:38 -08:00
James R. Barlow 9de06f62ee Use Python executors instead of pools 
ProcessPool/ThreadPool don't have the ability to notice when a child worker
was terminated. ProcessPoolExecutor and ThreadPoolExecutor do notice and
provide better error messages.

Add tests to check.
 2021-12-06 15:38:27 -08:00
James R. Barlow 26badf2882 typing: small improvements 2021-12-06 15:38:27 -08:00
James R. Barlow 8f873aaa45 sync: typing improvements 2021-12-06 15:38:27 -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 7ce1692eef windows: default version to '0' when looking for Ghostscript 
To avoid ValueError: max() arg is an empty sequence

As suggested by @meet1919 in #833.
 2021-11-14 23:00:08 -08:00
James R. Barlow 4634b20de5 Raise max-image-mpixels again 
PDFs are quite likely to have a lot of pixels, e.g. large high resolution scans.
250 MP is a page of A0 sized paper scanned at 400 DPI,
should be enough in most cases.
 2021-11-14 15:47:39 -08:00
James R. Barlow 3810e576ff optimize: fix mypy lint 2021-11-13 14:48:00 -08:00
James R. Barlow 01c7895044 pipeline: tidy 2021-11-13 14:47:49 -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 6f58a14351 pdfa: remove deprecated pkg_resources based access and tests 2021-11-13 00:52:03 -08:00
James R. Barlow 7ba04267b1 Remove shims to support for old versions of pikepdf < 4 2021-11-13 00:43:20 -08:00
James R. Barlow 698e8791d7 Remove Python 3.6 specific unicode environment checks 2021-11-13 00:28:52 -08:00
James R. Barlow 380b981763 Remove most Python 3.6 special casing 2021-11-13 00:27:48 -08:00
James R. Barlow 5abfb14c2a Remove leptonica and cffi 2021-11-13 00:06:35 -08:00
James R. Barlow 59642a98b2 Disable --remove-background so we can remove leptonica 2021-11-12 23:56:52 -08:00
James R. Barlow 42bf5476dd optimize: replace leptonica compdata with direct insert of JPEG 
Confirmed that img2pdf just inserts JPEG verbatim. Never had to go through
the trouble we did.
 2021-11-12 23:20:49 -08:00
James R. Barlow 30440104ba Remove --threshold argument 
Tesseract is now included better thresholding (binarization) in v5. Users that have
thresholding issues should try that first. If we find further problems
this can be brought back as a plugin.
 2021-11-12 20:09:55 -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 25d046ae95 Modernize OrientationConfidence definition 2021-11-10 00:55:23 -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 386453d178 pdfa: replace read_binary() with files() 2021-10-31 02:01:11 -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 c4c64c3ea0 pre-commit updates 2021-10-31 01:31:57 -07:00
James R. Barlow 21279f5784 Fix leaked file handle for output_type none 2021-10-28 02:50:17 -07:00