Patent ID: 6952494

Claim:
A color coordinate transformation table generation method comprising the steps of: selecting, from a sufficiently large number of color samples, a plurality of color samples suitable for inferring spectral characteristics of a color reading device as a subject of evaluation; obtaining sets of spectral reflectance data by measuring each of the selected color samples at predetermined wavelength intervals; accepting color signals representing colors of the respective selected color samples in a device-dependent color space from the color reading device as a subject of evaluation; inferring spectral characteristics of the color reading device when the color reading device reads a color of an original based on the sets of spectral reflectance data and the accepted color signals; and generating, according to the inferred spectral characteristics, a color coordinate transformation table indicating a relationship between color signals distributed in the device-dependent color space and sets of chromaticity coordinates indicating, in another color space, true colors to be represented by the color signals, respectively.