Patent ID: 8111430

Claim:
A color conversion apparatus having a central processing unit, comprising: an acquiring unit configured to acquire sample point data indicating correspondence between device-dependent color data and device-independent color data; a generating unit configured to generate a lookup table from the acquired sample point data; a first color conversion unit configured to perform a linear interpolation process on input color data by using the generated lookup table to generate a first color conversion result; a calculating unit configured to calculate a coefficient from the acquired sample point data; a second color conversion unit configured to perform a nonlinear interpolation process on the input color data by using the calculated coefficient to generate a second color conversion result; a weighting unit configured to set a first weighting value and a second weighting value corresponding to the input color data; and a mixing unit operated by the central processing unit so as to (1) apply the first weighting value to the first color conversion result to obtain a first weighted color conversion result, (2) apply the second weighting value to the second color conversion result to obtain a second weighted color conversion result, and (3) sum the first and second weighted color conversion results.