... 0London52W. Burger and M.J. Burge, Principles of Digital Image Processing: Advanced Methods,PrefaceThis is the 3rdvolume of the authors’ textbook series on Principles of Digital Image Processing that ... the vector-valued nature of color pixels. This is com-mon practice with both linear and non-linear filters and although the results of these monochromatic techniques are often visually quite acceptable, ... contained structures of interest (b).case that the structures of interest are darker than the background (as, forexample, in typical OCR applications) , one could either work with invertedimages...