Here's my list: For a general introduction: * "Digital Image Processing" by Gonzalez and Woods * "Image Processing, Analysis, and Machine Vision" by Sonka, Hlavac, and Boyle After you learn the basics, some more advanced and specialized books I'd recommend: * "Morphological Image Analysis" by Soille. * "Insight into Images" by Yoo (explains many of the algorithms in the ITK library). I hesitate to recommend this book because it is so dated (1992), but I refer to "Computer and Robot Vision" by Haralick and Shapiro quite often.
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