Good morning Seema, as for training tesseract for seven segment ocr, i also asked in the forum but did not find a reply. In the end i simply used opencv.
Steps where: - Convert image to black and white - Clean the image (erosion, dilation, etc) - Contour detection (works very well). - Once I have countours, i made three lines. One that cuts vertically the contour by the half. And two horizontal lines at 1/4 of contour height and 3/4. - Set point were segments cross the lines to get 7 points (the vertical lines cut three segments) and the horizontal cut both two (upper and lower segments) The check for pixel value. If black consider segment as active. With resultng segments, you get which number is in use. Hope this helps ;) PD: On this page you can see similar algorithm used: http://www.unix-ag.uni-kl.de/~auerswal/ssocr/ Raj found how to do it with tesseract, but was not able to answer. https://groups.google.com/forum/?fromgroups=#!topic/tesseract-ocr/elnIngFJvQs Good paper describing similar process to what i had to do: http://morgoth.zemris.fer.hr/people/Marko.Cupic/files/2009-SP-MIPRO.pdf Hope it works out for you ;) Kind regards, El domingo, 27 de enero de 2013 23:43:04 UTC+1, Seema Shettar escribió: > > > > On Thursday, March 5, 2009 3:03:03 AM UTC-4, Raj wrote: >> >> Hi All.... >> >> i'm newbie and want 2 use tesseract ocr for detecting 7-segment >> display. >> >> for this i'm using c#.net 2005 and a image processing open source >> (opencv) and c# wrapper emgucv to achieve the task. >> >> i have removed noise from the image before passing it to tesseract >> ocr engine. >> >> but i'm getting mixed results. like for digit ' 0' -- detecting as 11. >> digit '6' as 5 >> >> i read about training the tesseract. Is it possible for me to train >> the " 7 segment display ". >> >> If yes, then please tell me the process how can i get tesseract to >> train. >> >> >> >> Thank U. >> >> >> -- -- 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 unsubscribe from this group, send email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
