That is correct. Usually for binarization an adaptative algorithm (Sauvola) is used. This requires two parameters. Sometime to improve recognition we repeat OCR iteratively with several setting of those parameters, and we vote at the end. Giuseppe
From: Manish Jain Sent: Wednesday, May 25, 2011 10:01 AM To: [email protected] Subject: Re: Need help in reading characters Dear Menga, I was also thinking to use some grazing light, which should enhance the characters. Sorry, I am not familiar with leptonica, are you using Leptonica for bianrization of the image? Thanks. Regards, Manish On Wed, May 25, 2011 at 1:09 PM, Giuseppe Menga <[email protected]> wrote: We had the same problem with the expiration date on medicine boxes. We obtain satisfactory results using grazing light and by a careful binarization of the image. We are using for this Leptonica. Giuseppe -----Messaggio originale----- From: Character Sent: Wednesday, May 25, 2011 8:31 AM To: tesseract-ocr Subject: Need help in reading characters Hi, I need to implement a solution for reading characters from images taken in the production line. The text I need to read is engraved on the manufacturing parts. That's why it is bit blurred. Can anybody please suggest if there is any preprocessing required in order to use tesseract.I can send the sample images if required. Regards, Manish -- 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 mailto: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 mailto: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 -- 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
