A Study on Color Match between Soft Copy and Corresponding Hard Copy.

This paper discusses a colorimetry-based method to produce color prints whose tristimulus values match those of the colors displayed on CRT screens. It addresses a colorimetric linear model for CRT displays taking into account the gamma characterisics, and a nonlinear model for the equipment which produces color prints. The latter incorporates Bouguer's Law and the spectral charactrisics of illuminants which illuminate the hard copy. A set of mathematical equations for the common signals R, G and B is formulated as a function of the both models. The equation was solved by the method of least squares for the optimum color match. The validity of the theory is examined by evaluating the color differences in an actual example.