COLOR CONVERSION TABLE CREATING METHOD, COLOR CONVERSION TABLE CREATING DEVICE, AND STORAGE MEDIUM ON WHICH COLOR CONVERSION TABLE CREATING PROGRAM IS RECORDED

摘要

The invention relates. to a color coordinate transformation table generation. method and apparatus for generating a color coordinate transformation table that is used for generating a profile indicating a relationship between. color signals scattered in a desired distribution in a color space that depends on the color reading device and sets of chromaticity coordinates indicating, in a predetermined color space, true colors to be represented by the color signals, as well as to a storage medium on which a related color coordinate transformation table generation program is recorded.;In the color coordinate transformation table generation method and apparatus according to the invention, color samples that are useful in inferring spectral characteristics of a color reading .device are selected and a model analysis. technique using spline functions or a singular value analysis technique is employed in inferring spectral characteristics. As a result, whereas the number of color samples necessary to infer spectral characteristics can greatly be decreased, spectral characteristics can be inferred precisely.;Further, in the color coordinate transformation table generation apparatus according to the invention, an association table including a large number of elements can be generated according to a technique of generating virtual color samples or deriving color signals from a lot of sets of spectral reflectance data by using inferred spectral characteristics of a color reading device.