Patent ID: 7239744

Claim:
A color conversion method wherein an input color signal is converted into an output color signal prescribed in a predetermined color space, the method comprising: receiving an evaluation input color signal based on a standardized color chart; calculating by a multivariate analysis a fundamental conversion matrix for converting the evaluation input color signal into an evaluation output color signal, by performing a multiple linear regression analysis to minimize squared errors of the evaluation output color signal relative to a theoretical output color signal, the theoretical output color signal being based on the standardized color chart; calculating a corrective color signal by modifying the evaluation input color signal with a predetermined corrective element; calculating by a multivariate analysis a corrective conversion matrix for converting the corrective color signal into a corrective output color signal, by performing a multiple linear regression analysis to minimize squared errors of the corrective output color signal relative to the theoretical output color signal; calculating a target conversion matrix from the fundamental conversion matrix and the corrective conversion matrix by associating the fundamental conversion matrix and the corrective conversion matrix through weighting; and converting the input color signal into the output color signal in accordance with the target conversion matrix.