Where did you find "advertised features of tesseract is that it works equally well for black-on-white and white-on-black text"? I never heard about it. See forum for other experience: https://groups.google.com/d/topic/tesseract-ocr/XoX6t5Ih1IM/discussion
-- Zdenko On Tue, Dec 4, 2012 at 2:42 PM, Speedy <[email protected]> wrote: > Why is a black background a problem? One of the advertised features of > tesseract is that it works equally well for black-on-white and > white-on-black text. Marcus > > > On Tuesday, December 4, 2012 11:11:36 AM UTC+1, zdenop wrote: > >> Search forum. I remember discussion about **similar topic. >> AFAIR: tesseract has problem with letter(symbol) that consists of several >> not connected parts (e.g. dots, lines) - solution should be to preprocess >> image (blur). >> >> Generally: black background is problem. Quality of image is too low >> (JPEG, quality: 75), there is no information about DPI... Anyway this "LED" >> font is not standard font, so maybe training will be need. >> >> -- >> Zdenko >> >> On Tue, Dec 4, 2012 at 12:43 AM, mike oldfield <[email protected]>wrote: >> >>> >>> <https://lh5.googleusercontent.com/-Ly6oR_Rmkag/UL04-iH5XaI/AAAAAAAAAAU/J-T592D8834/s1600/1.jpg> >>> Hello >>> >>> I`d like to recognize LED-like numbers/digits. >>> I attached image (jpg, 680x320, brightness 65%, contrast 100%). >>> Is there any libraries or presets to decode these digits? For example >>> googledocuments conversion and free-ocr.com doesn`t work. >>> >>> >>> >>> >>> >>> >>> -- >>> 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 >>> tesseract-oc...@**googlegroups.com >>> >>> For more options, visit this group at >>> http://groups.google.com/**group/tesseract-ocr?hl=en<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 > -- 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
