While this is somewhat of a specialised book, if you have to do any work with image processing (OCR, shape recognition, etc.), there are some good frameworks out there, but there’s hardly an abundance of easily accessible information on the subject if you need to implement something yourself. Algorithms for Image Processing and Computer Vision (2nd Edition) is one of the better books available, and while — like most specialised technical books — it isn’t cheap, it is a good value given the amount of information it covers in one place.
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