Color processing device, color processing method, and computer readable medium storing program

A color processing method comprising:

• calculating hues in a device-dependent color space of an input side device;
• calculating hues in a device-independent color space of an output side device of a plurality of reproduction colors that are positioned on an input color gamut boundary and that have different hues;
• deriving a correspondence between the hues in the device-dependent color space and the hues of the corresponding colors in the device-independent color space, on the basis of the calculated hues in the device-independent color space, by calculating, on the plurality of reproduction colors, individual hues of corresponding colors in which a determined difference in at least one of lightness and chroma caused by color gamut mapping performed in the device-independent color space is smaller than a determined difference caused by the color gamut mapping performed on the reproduction colors;
• correcting the input colors so that hues in the device-independent color space of the input colors become similar to the hues of the corresponding colors in the device-independent color space corresponding to the hues in the device-dependent color space of the input colors obtained by calculating, using the correspondence derived by the deriving unit, hues in the device-dependent color space from input colors;
• and
• performing the color gamut mapping in which the corrected input colors are mapped into an output color gamut in the device-independent color space.

A non-transitory computer readable medium storing a program causing a computer to execute a process for processing colors, the process comprising:

• calculating hues in a device-dependent color space of an input side device;
• calculating hues in a device-independent color space of an output side device of a plurality of reproduction colors that are positioned on an input color gamut boundary and that have different hues;
• deriving a correspondence between the hues in the device-dependent color space and the hues of the corresponding colors in the device-independent color space, on the basis of the calculated hues in the device-independent color space, by calculating, on the plurality of reproduction colors, individual hues of corresponding colors in which a determined difference in at least one of lightness and chroma caused by color gamut mapping performed in the device-independent color space is smaller than a determined difference caused by the color gamut mapping performed on the reproduction colors;
• correcting the input colors so that hues in the device-independent color s ace of the input colors become similar to the hues of the corresponding colors in the device-independent colors space corresponding to the hues in the device-dependent color space of the input colors obtained by calculating, using the correspondence derived by the deriving unit, hues in the device-dependent color space from input colors;
• and
• performing the color gamut mapping in which the corrected input colors are mapped into an output color gamut in the device-independent color space.