Patent ID: 7420706

Claim:
A method for generating a color characterization model for a color input device, the color characterization model for performing transformation from a device-dependent color space of the color input device to a device-independent color space, the method comprising the steps of: accessing a first set of color measurement data corresponding to actual measurements of a color target by the color input device, wherein the color target has known color values in the device-independent color space and the actual measurements are obtained by the color input device in the device-dependent color space, wherein the actual measurements define a measurement range in the device-dependent color space, and wherein the measurement data includes data point pairs, each data point pair having corresponding actual measurements and known color values; generating a second set of data point pairs based on plural device-dependent values outside the measurement range, by extrapolating device-independent values corresponding to the device-dependent values outside the measurement range from the first set of color measurement data; and determining the color characterization model based on both the first set of color measurement data and the generated second set of data point pairs.