| 摘要 |
In order to implement color matching between different printers upon proofing or the like, color processing that absorbs not only a difference between gamuts but also differences among white, black, and a gray line is required. Two pieces of gamut information of an appearance color space of first and second image devices are acquired. The color signals on a gray line of each gamut information are converted into those on a lightness axis of the appearance color space. A gamut indicated by the gamut information of the first image device is mapped within a gamut indicated by the gamut information of the second image device. Color signals after mapping, which correspond to a gray line of the first image device, are converted into gray color signals according to white and black indicated by the gamut information of the second image device.
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