I have learnt image processing from the book by Gonzalez named 'Digital Image Processing' (Digital Image Processing). It is one of the best books to learn from. Also, you can do the 'Fundamentals of Digital Image and Video Processing' course provided by NorthWestern University. (Fundamentals of Digital Image and Video Processing)
These MATLAB functions are not part of a MathWorks toolbox. I am guessing that the book probably has a CD of supporting functions, or provides info on where to find these functions online.
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