Abstract: A profile editing system enables modifications to source/destination color data and/or gamut maps. Generally, there are three process flows for color profile editing according to the invention. A first type or type-A process is directed to a method for gamut mapping source color data to destination color data. The method comprises modifying the source color data in a source color space, based upon a color profile edit. This generates modified source color data. Then, the modified source color data is converted to the destination color space to produce the destination color data. Type-B processes are directed to methods for gamut mapping source color data to destination color data and then modifying the destination color data, based upon a color profile edit to generate modified destination color data.

Abstract: In order to achieve a larger color gamut, more colorants are used than the classical three chromatic colors cyan, magenta and yellow. The use of extra process colors, such as red or orange, green and blue, poses extra requirements on the screening process or on the color separation process. A method is described in which optimal color rendering is achieved by use of maximum three chromatic colorants at the same place only. In one embodiment particular sets of three chromatic colorants each cover color sub-gamuts which are disjunctive, allowing each input color to be located within one color sub-gamut. A set comprises no complementary colors.