问题
I have a multi-page document that is being scanned. Sometimes, either because the document was a fax or simply a bad scan, the barcode reading software cannot determine the value of the barcode.
The barcode could be on any page within the document, however, this page should be the "header" page and moved to the front. How can I automatically detect that the image has a barcode when the value cannot be read with typical barcode reading tools?
The usual barcode type is Code39, but sometimes it could be DataMatrix. I am mostly concerned about detecting mis-read Code39, as I think it will be easier to detect.
回答1:
Maybe take a look at: http://code.google.com/p/zxing/
来源：https://stackoverflow.com/questions/5757295/how-to-detect-possible-presence-of-barcode-in-image-when-value-cannot-be-read