>From our experience at least with images of business cards, Tesseract seems to do better when given a grayscale image, especially if you think you know better which weights to assign to the red, green and blue components when you build your grayscale. If you have an iPhone / iPod Touch / iPad and wants to see for yourself the Tesseract 3.0 results when given a grayscale image, try ScanBizCards Lite, free at http://itunes.apple.com/us/app/scanbizcards-lite-business/id338143149?mt=8).
Having said that, there are exceptions to every rule - we try to dynamically determine whether color mode may work better and revert to that mode in that case (happens in less than 10% of images). Patrick On Jun 30, 2:16 pm, Andres <[email protected]> wrote: > Hi, > > Regarding that point, is there some place to guide what's better for > preprocessing for tesseract ? > I'm not even sure if it prefers monochrome or grayscale images :) I'm using > OpenCV, but i have not clue about what tesseract prefers... > > Cheers, > > Andres > > 2010/6/30 patrickq <[email protected]> > > > I would highly question the assertion thatwww.free-ocr/comoutput is > > 100% accurate :-). In any case, it's expected that their output would > > be better: Tessnet2 is just an application wrapper around Tesseract > > whilewww.free-ocr.comincludes their own image pre-processing prior > > to submitting it to Tesseract. > > > Patrick > > > On Jun 30, 2:00 pm, Professional Developer <[email protected]> > > wrote: > > > Hi, > > > > I created a project which accept an image file and then processed > > > using tessnet and then show the text of the image in a text box. But > > > its output is not 100% accurate. > > > > As far I know tessnet2 is a .net wrapper for tesseract-ocr and the > > > sitehttp://www.free-ocr.comalsoused tesseract-ocr to process > > > images. But the output ofhttp://www.free-ocr.com/is100% accurate > > > where tessnet2 is giving wrong text output for some of the images I > > > tested. Can you please let me know why tessnet2 is not working > > > properly? > > > > Thanks for your help in advance! > > > > Kind regards > > > > Altaf > > > -- > > You received this message because you are subscribed to the Google Groups > > "tesseract-ocr" group. > > To post to this group, send email to [email protected]. > > To unsubscribe from this group, send email to > > [email protected]<tesseract-ocr%[email protected]> > > . > > For more options, visit this group at > >http://groups.google.com/group/tesseract-ocr?hl=en. -- You received this message because you are subscribed to the Google Groups "tesseract-ocr" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/tesseract-ocr?hl=en.
