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

摘要

A color processing device includes a calculating unit that calculates hues in a device-dependent color space and hues in a device-independent color space of plural reproduction colors that are positioned on an input color gamut boundary and that have different hues, a deriving unit that calculates hues of corresponding colors in which a change in at least one of lightness and chrome caused by color gamut mapping performed in the device-independent color space is smaller than a change caused by the color gamut mapping performed on the reproduction colors, thereby 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, a hue correcting unit that calculates hues in the device-dependent color space from input colors, thereby correcting the input colors, and a color gamut mapping unit that performs the color gamut mapping.

主权项

1. A color processing device comprising:
a calculating unit that:
calculates hues in a device-dependent color space of an input side device; andcalculates 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; a deriving unit that is configured to derive 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 hues in the device-independent color space calculated by the calculating unit, 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 plurality of the reproduction colors; a hue correcting unit that is configured to correct 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 the input colors; and a color gamut mapping unit that performs the color gamut mapping in which the input colors corrected by the hue correcting unit are mapped into an output color gamut in the device-independent color space.