Patent ID: 7119927

Claim:
A color conversion device for converting first color data into second color data by performing pixel-by-pixel color conversion, the color conversion device comprising: a coefficient generator for generating matrix coefficients; a first calculator for generating a first calculation term which is substantially effective for one of hues of red, green, and blue, and a second calculation term which is substantially effective for one of hues of cyan, magenta, and yellow, based on the first color data; a second calculator for generating a third calculation term which is substantially effective for only one inter hue region between adjacent hues of red, green, blue, cyan, magenta, and yellow using the first calculation term and the second calculation term; a matrix calculator for performing a matrix calculation using the matrix coefficients, the first calculation term, the second calculation term, and the third calculation term; and a tone converter for converting tone characteristics of the color data obtained by the matrix calculation to generate the second color data, wherein each of the first calculation term and the second calculation term includes a second order term.