Dave Meikle created TIKA-2357:
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Summary: Allow Tesseract PSM up to 13
Key: TIKA-2357
URL: https://issues.apache.org/jira/browse/TIKA-2357
Project: Tika
Issue Type: Improvement
Components: ocr
Affects Versions: 1.14
Reporter: Dave Meikle
Priority: Minor
Fix For: 1.15
>From https://github.com/apache/tika/pull/177 by Rafael Ferreira
Extend support for increased PSM options up to 13 for modern versions of
Tesseract.
{code}
$ tesseract --version
tesseract 3.05.00
leptonica-1.74.1
libjpeg 8d : libpng 1.6.29 : libtiff 4.0.7 : zlib 1.2.8
$ tesseract --help-psm
Page segmentation modes:
0 Orientation and script detection (OSD) only.
1 Automatic page segmentation with OSD.
2 Automatic page segmentation, but no OSD, or OCR.
3 Fully automatic page segmentation, but no OSD. (Default)
4 Assume a single column of text of variable sizes.
5 Assume a single uniform block of vertically aligned text.
6 Assume a single uniform block of text.
7 Treat the image as a single text line.
8 Treat the image as a single word.
9 Treat the image as a single word in a circle.
10 Treat the image as a single character.
11 Sparse text. Find as much text as possible in no particular order.
12 Sparse text with OSD.
13 Raw line. Treat the image as a single text line, bypassing hacks that
are Tesseract-specific.
{code}
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