Patent ID: 7586642

Claim:
A color space transformation matrix calculating system that optimizes a color space transformation matrix which transforms colors in a first color space to colors in a second color space, comprising: a first optimizer that calculates elements of a first matrix by multiple linear regression analysis, where input colors in said first color space, which correspond to a plurality of color patches, are set as first explanatory variables, first goal colors that relate to hue in a second color space and which correspond to said plurality of color patches are set as first criterion variables, and said elements of said first matrix are set as partial regression coefficients, and where, saturation and hue values for each of said color patches differ slightly from each other; and a second optimizer that calculates elements of a second matrix by multiple linear regression analysis, where hue corrected colors calculated using said first matrix and said input colors in said first color space are set as second explanatory variables, second goal colors that relate to saturation in a second color space and which correspond to said plurality of color patches are set as second criterion variables, and said elements of said second matrix are set as partial regression coefficients; wherein said color space transformation matrix is a product of said first and second matrices.