Patent ID: 8531729

Claim:
A color processing apparatus for generating a profile for color separation that indicates a relationship between input color values in an input color space and output signal values to be output to an image forming device, the apparatus comprising: an estimator, configured to estimate a color value of an output color reproduced by an output signal value, wherein the output signal value is obtained by sampling a range of the output signal value and corresponds to an input color value of a grid point in the input color space; a first calculator, configured to calculate a first evaluation value of change between a color value estimated to an input color value of a grid point of interest in the input color space by the estimator and color values estimated to input color values of grid points adjacent to the grid point of interest by the estimator; a second calculator, configured to calculate a second evaluation value of change between an output signal value of the grid point of interest and output signal values of the adjacent grid points; a third calculator, configured to calculate a third evaluation value of change between a plurality of color values estimated to the input color value of the grid point of interest in a plurality of illuminants, which are different, by the estimator; a determiner, configured to determine whether or not a sum of the first to third evaluation values becomes less than a predetermined threshold value by changing the input color value of the grid point of interest; and a setting section, configured to set the output signal value, which reproduces the estimated color value of the grid point of interest, to the grid point of interest when the input color value of the grid point of interest that the sum becomes less than the predetermined threshold value is obtained.