Patent ID: 7505625
Filing Date: 2009-03-17
Classification: G06K,H04N

Abstract:
1. A color management method for converting color values to CMYK color values, wherein the method utilizes a color transform that converts CMYK color values to appearance space color values, the color transform being arranged as a plurality of three-dimensional CMY space to appearance space lookup tables, each indexed to a different K value, the method comprising using a processor to perform the steps of: receiving a target appearance space color value; determining neutrality of the target appearance space color value; selecting one of the plurality of CMY lookup tables that contains the target appearance space color value based on the determined neutrality of the target appearance space color value; obtaining the K value indexed to the selected one lookup table; interpolating a CMY value from the selected one lookup table and the target appearance space color value; providing the interpolated CMY value and the indexed K value obtained from the selected one table as the converted CMYK color value.