Patent ID: 7199900
Filing Date: 2007-04-03
Classification: B41F,B41P

Abstract:
1. A color conversion coefficient preparation apparatus for preparing color conversion coefficients to convert n color values including black in a first machine-dependent color space into n color values including black in a second machine-dependent color space, the color conversion coefficient preparation apparatus comprising: a first TRC preparation section for preparing a color conversion coefficient for each color to convert the n color values in the first machine-dependent color space into n color values in a first adjustment-machine-dependent color space with adjusted gradation of a single color in the first machine-dependent color space; a second TRC preparation section for preparing a color conversion coefficient for each color to convert n color values in a second adjustment-machine-dependent color space with adjusted gradation of a single color in the second machine-dependent color space into the n color values in the second machine-dependent color space; and a K preservation n-dimensional DLUT preparation section for preparing an n-dimensional lookup table for converting the n color values in the first adjustment-machine-dependent color space into the n color values in the second adjustment-machine-dependent color space with the characteristic of black preserved.