Thank you for your reply! And since the bank card embossing characters are designed to be OCR-able(according to the ISO 7811 spec), why there is no implementation examples available on the internet? And there is no similar problem in tesseract forum either. I have searched for a lot, but I find nothing. This problem should be an easy one or not?
在 2012年11月20日星期二UTC+8下午9时45分13秒，TP写道： > > On Mon, Nov 19, 2012 at 9:07 AM, Neo Song <[email protected] <javascript:> > > wrote: > >> Dear All, >> I am now needing to OCR the embossing characters on the bank card. >> These characters are in two kind of font. The first one is Farrington 7B, >> which is used to present the account number, and another font is >> unknown(maybe bank-dependent) and is used to present card holder name, card >> issue time and card serial number. >> Now the problem is the embossing characters are very difficult to OCR >> since they will be very bright under special light. While if the extra >> light is not applied, the card background will largely affect these >> characters, and will cause error. >> I have uploaded two images. The first sample image shows that >> improper light applied will cause the characters to be dark/light mixed and >> OCR result is very bad. The second image shows that a better light will >> make the background dark and embossing characters very sharp, while the OCR >> result is a little bit better, but still not good enough. >> Can anybody give me some advice on the light applied, or image >> pre-processing technique to improve the OCR result? Thank you all! >> > > Crazy (and expensive) idea: > > How about taking two or maybe four pictures of each card with the light > coming low from the side on the left and right (and maybe also from > top/bottom), then doing some sort of image processing combination? > Hopefully if the light is low enough the background will fade out and only > the various edges of the raised characters will be visible. Of course this > would require some special hardware and the ability to turn a different > light on for each scan. > -- 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
