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AmitGorvadiya / tesseract-ocr

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Feature request: Ability to invert image to handle white text on black #326

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
OCR fails on White text on black background. IF you could invert the image then 
text would be black on white. A simple button in the bar on the left would 
suffice.

Original issue reported on code.google.com by wideopen...@googlemail.com on 7 Jul 2010 at 3:31

GoogleCodeExporter commented 9 years ago 
I don't believe this is correct. I have been processing images with white text 
on black and actually getting slightly better results.

Original comment by patrick....@gmail.com on 7 Jul 2010 at 3:41

GoogleCodeExporter commented 9 years ago 
The documentation for Tesseract is unfortunately sparse, if it even exists at 
all, but the papers about Tesseract mention that this was one of the original 
design considerations, and you can safely assume that if Tesseract fails with 
white on black, manually inversing it will make no difference in the 
recognition.

If you want to open a new issue, I suggest that you either include the image in 
the issue report, or a link to it; supplying your own diagnosis in lieu of real 
information is not helpful.

Original comment by joregan on 8 Jul 2010 at 11:15