Patent ID: 8045220

Claim:
A method of creating a second color conversion table for converting an input color signal value into an output color signal value, said method comprising: using a processor to perform the steps of: creating a first color conversion table for converting an input color signal value into an output color signal value by using a first target color corresponding to color reproducibility with emphasis on coincidence of colorimetry, and a color-space correspondence table for converting from a color space of the output color signal value into another predetermined color space; determining a first output color signal value corresponding to a second target color, which is determined for a grid point of the second color conversion table to be created, by an interpolation computation of the first color conversion table; setting a neighboring region of the determined first output color signal value and determining a second output color signal value that is most approximate to the second target color in the neighboring region, by using the color-space correspondence table; and setting the determined second output color signal value as grid point data of the grid point of the second color conversion table to be created, wherein the second color conversion table is any one of a table associated with color reproducibility with emphasis on tone, a table associated with color reproducibility with emphasis on chroma, or a table associated with color reproducibility with emphasis on memory color, and wherein said second target color is a color of reproducibility with emphasis on tone, a color of reproducibility with emphasis on chroma, or a color of reproducibility with emphasis on memory color.