Patent ID: 7411697
Filing Date: 2008-08-12
Classification: H04N

Abstract:
1. A color conversion device for converting an input color value set B1in to be used for controlling a device A 1 into an output color value set B2out to be used for controlling another device A 2 , the color conversion device comprising: a profile-storing portion storing profile data PF an original lookup table creating portion creating an original lookup table T a first achromatic-color value table creating portion creating a first achromatic-color value table T1 by determining standard color value sets D1 for the several first achromatic color value sets B1a based on the profile data PF a second achromatic-color value table creating portion creating a second achromatic-color value table T2 by determining standard color value sets D2 for a plurality of second achromatic color value sets B2a based on the profile data PF an achromatic-color value correspondence table preparing unit preparing an achromatic-color value correspondence table T3 by extracting, for each first achromatic color value set B1a in the first achromatic-color value table T1, one second achromatic color value set B2a from the second achromatic-color value table T2, and setting a correspondence between the subject first achromatic color value set B1a and the extracted second achromatic color value set B2a, the standard color value set D2 for the extracted second achromatic color value set B2a being the closest to the standard color value set D1 for the subject first achromatic color value set B1a among all the standard color value sets D2 in the second achromatic-color value table T2; an input portion receiving an input color value set B1in to be used for controlling the device A a color conversion portion converting the input color value set B1in into an output color value set B2out by using data of either one of the original lookup table T