Using filters to cancel out colors other than the target color, it should be possible to iteratively extract text of a certain color (say red, green, blue, black, etc.) But that would be hard. Generally people just want to get the text and fix the colors later. --Sven
On Sun, May 2, 2010 at 1:41 PM, Sandro Zahra <[email protected]> wrote: > I think that OCR is not about colours..... > > On 2 May 2010 17:35, lux <[email protected]> wrote: >> >> I need the RIGHT position of the text or the RIGHT color, not an >> average color :/. >> >> On 11 Apr, 20:48, MARTIN Pierre <[email protected]> wrote: >> > > So how can I get the position of text? >> > > I've tryed with makebox but it's not really right, it gives me the >> > > cordinates of the whole "letter box" so it's impossible for me to get >> > > the right pixel of the letter >> > > (e.g. it would work for an 'I' but for an 'A' it gives me the box left >> > > up and right down position so I don't know how to get the letter color >> > > because the 'A' is not at the start nor at the end of the box). >> > >> > That's the right method. If you want to know where the "pixels" are, do >> > an histogram equalization of your picture, then contrast it with a fairly >> > agressive threshold (If it's not already in 1bpp), this will give you a >> > copy >> > of your picture with only black and black pixels. Now, that's on this >> > picture (Basically 1bpp depth picture) that you run tesseract. >> > Then given the boxes, you look in your black & white picture where black >> > pixels are in the boxes, and then with the same coordinates you can see >> > them >> > in your original picture. After that, do color average from all pixels in a >> > box in your original picture and you're good. >> > >> > Pierre. >> >> -- >> 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. > -- ``All that is gold does not glitter, not all those who wander are lost; the old that is strong does not wither, deep roots are not reached by the frost. >From the ashes a fire shall be woken, a light from the shadows shall spring; renewed shall be blade that was broken, the crownless again shall be king.” -- 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.
