Patent ID: 8593682

Claim:
A color conversion system for color conversion of image data in a L*a*b* color space, the color conversion system comprising a color conversion processor configured to implement: a first color conversion for color conversion of data positions of an image data in a reference-color representing first region covering a constant hue line at a prescribed hue angle on an a*b* plane; and a second color conversion for color conversion of data positions of the image data in a second region set outside the first region within an angular range smaller in hue angle than the prescribed hue angle on the a*b* plane, the prescribed hue angle being set up in an angular region of 0 degree or more and 90 degree or less relative to an a* axis, the color conversion processor being adapted to implement mutually different color conversion processes for the first color conversion and the second color conversion, wherein the prescribed hue angle is set to 45 degree, and the second color conversion comprises a color conversion of increasing b* component of a color coordinate of a data position and moving the data position closer to the constant hue line at a hue angle of 45 degree.