Patent ID: 8154763

Claim:
An image forming device for generating color data contained in a second color gamut of a second device based on color data contained in a first color gamut of a first device; the image forming device comprising: a color data generation unit that is operable to divide the first color gamut into two or more layers based on grid point coordinates of a color conversion lookup table; a color gamut compression unit that is operable to generate a chroma value of each layer of the second color gamut based on a chroma value of each layer of the first color gamut; and an LUT generation unit that is operable to generate the color conversion lookup table based on the generated second color gamut wherein the color data generation unit is operable to, (i) determines a maximum chroma value for each layer of the first color gamut, and (ii) obtains magnitude and/or direction of a vector, the vector defined as starting from the maximum chroma value of one layer and ending at the maximum chroma value of the next layer; the color gamut compression unit is operable to, (i) compresses the maximum chroma value of an outermost layer of the first color gamut to a maximum chroma value of an outermost layer of the second color gamut, (ii) generates a maximum chroma value for each layer of the second color gamut based on the magnitude and/or the direction of the vector, with the vector defined as having the maximum chroma value of the outermost layer of the second color gamut as a starting point, (iii) determines a range of each layer of the second color gamut based on the maximum chroma value of each layer, and (iv) compresses a hue value of the first color gamut to the second color gamut based on the range of each layer; and the LUT generation unit is operable to generates the color conversion lookup table based on the second color gamut generated through compression.