Patent ID: 7787149

Claim:
A method of using an image processing apparatus for generating a color conversion table for converting M color signals of an input system into N color signals of an output system, comprising the processor steps of: correcting, for each fundamental color, a calculation target point by moving a position, on chromatic coordinates, of the maximum gradation of the fundamental color of the output system to a position, on the chromatic coordinates, of the maximum gradation of fundamental color of the input system; and correcting, for each gradation other than the maximum gradation of each fundamental color, a calculation target point of the fundamental color of the output system by moving a position, on the chromatic coordinates, of the gradation of the fundamental color of the output system to a position, on the chromatic coordinates, of the gradation of the fundamental color of the input system wherein correcting, for each fundamental color, is performed by calculating a first moving distance by obtaining a difference between the position of the maximum gradation of the fundamental color of the output system and the position of the maximum gradation of the fundamental color of the input system; and wherein correcting, for each gradation other than the maximum gradation of each fundamental color, is performed by calculating a second moving distance by obtaining a difference between a position of the gradation of the fundamental color of the output system and a position of the gradation of the fundamental color of the input system.