Patent ID: 6963426

Claim:
A method for creating a color transformation table correlating a color signal outputted from a color input device in a color space of said color input device (hereinafter referred to as a transformation source color space) with a color signal in a color space (hereinafter referred to as a transformation target color space) which is different from said transformation source color space, comprising: defining a plurality of regions obtained by dividing an entire portion of said transformation target color space; and creating a color transformation table by using a plurality of color transformation formulas corresponding to said plural regions, respectively, said plural regions being defined when being divided; wherein creating said color transformation table includes: creating a relationship between a color signal in said transformation source color space and a color signal in said transformation target color space by using said color transformation formula according to each region for each of said color transformation formulas; determining that a color transformation result is correct when said color transformation result, into which one color signal in said transformation source color space is transformed through a color transformation formula when said relationship is created, belongs to a region corresponding to said color transformation formula; and creating said color transformation table based on said relationship created for each of said color transformation formulas and said color transformation result determined to be correct.