Patent ID: 8204304

Claim:
An image processing apparatus which performs mapping of a color signal of a first gamut to a color signal of a second gamut on a device-independent color space, comprising: a processor connected to a memory; a first forming unit which forms a table for determining a correspondence relationship between the color signal of the first gamut and the color signal of the second gamut; a second forming unit which forms a cross-sectional surface of the second gamut; a mapping unit which performs mapping of the color signal of the first gamut on the cross-sectional surface of the second gamut in each predetermined hue by referring to the table; a conversion unit which converts the color signal on the cross-sectional surface of the second gamut into an output device-dependent color signal; and an LUT (lookup table) forming unit which forms a plurality of LUTs corresponding to kinds of the tables and kinds of the cross-sectional surfaces as the LUTs for converting a device-dependent color signal corresponding to the color signal of the first gamut into the output device-dependent color signal.