Compressor, Color Converter, Method Thereof, Program, Look-Up Table, And Storage Medium

摘要

Color conversion corresponding to input color signals of M kinds (where M is an integer of 2 or greater) is expressed as signal groups, and a principal component analysis is executed to determine a basis signal so that a difference between (1) a value of addition of an average value of the signal groups and a cumulative sum of the basis signal multiplied by a coefficient and (2) the signal groups, becomes a minimum. The coefficient obtained is stored. Employing the stored coefficient, the principal component analysis is executed N times (where 0<=N<=M-2), whereby a compression process for a color conversion process corresponding to each of the input color signals is performed. Thus, a memory quantity is greatly reduced while maintaining accuracy of color conversion of a specified color of LUT to some degree.