chriswolfvision/local_adaptive_binarization
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Local adaptive image binarization
3 mentions on Hacker News by 2 people: 0 stories, 3 comments · first 2019-12-20 · latest 2022-01-25
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Not off the shelf but here are some tools. I have no experience with them. Wolf binarization - I think it makes the text more clear before OCR. https://github.com/chriswolfvision/local_adaptive_binarizati... This thing OCRs the pdf using…
comment by throwawayciv651 · 2022-01-25 · in Recovering redacted information from pixelated videos -
If you are trying to detect text from document images / photos: tesseract is strongly focused mainly on the OCR part of the whole preprocessing(1). If you would like to get better results on that, you could use the wolf binarization tool…
comment by sandreas · 2021-07-19 · in Tesseract OCR -
The preprocessing step uses otsu, which is pretty inaccurate, because it uses only one single threshold value for the whole image. An adaptive thresholding algorithm (like Sauvola or Wolf binarization) could improve the whole preprocessing…
comment by sandreas · 2019-12-20 · in A guide to OCR with Tesseract, OpenCV and Python