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For that I suggest "Feature Extraction and Image Processing" 2.ed by Mark Nixon and Alberto S Aguado. But "Digital Image Processing" (DIP) by Gonzalez and Woods as suggested by monk_the_dog is pretty much the standard prereq. Actually DIP may get you what you need depending on how deep you need to go.
Feature Extraction and Image Processing looks pretty good. Do you think a beginner would be able to follow it without reading Digital Image Processing first?