Non-linear grayscale normalization for layout analyse and/or text recognition#3857

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JKamlah wants to merge 8 commits intotesseract-ocr:mainfrom

Commits on Apr 4, 2022

Add: Non-linear grayscale normalization as preprocessing based on nlbin (Thomas Breuel).
JKamlah
committed

Commits on Apr 20, 2022

Add three normalization modi: Only for thresholding, only for recognition and for both tasks.
JKamlah
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Commits on Apr 25, 2022

Reformat code.
JKamlah
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Commits on Jul 1, 2022

Add preprocessing parameter for grayscale normalization (preprocess_graynorm_mode). There are 4 modes 0 - no normalization, 1 - thresholding+recognition, 2 - thresholding (only), 3 - recognition (o…
JKamlah
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Fix write preprocess image with tessedit_write_images.
JKamlah
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Commits on Jul 4, 2022

Fix error warning text, delete empty lines and old parameter config.
JKamlah
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Commits on Mar 5, 2023

Merge branch 'tesseract-ocr:main' into nlbin
JKamlah
authored

Commits on Dec 6, 2023

Merge branch 'tesseract-ocr:main' into nlbin
JKamlah
authored