Abstract
A method is described for realizing an exact color reproduction on a printer using more than three color inks. The CIE-L*a*b* color system is used as the device-independent color space. The mapping from the L*a*b* color space to the printer color space is constructed using a neural network. This mapping does not use such techniques as UCR and GCR. The problem in four-color printing is considered as the problem of controlling an unknown system with four inputs and three outputs. We present a two-phase procedure for solving this control problem. The first phase determines a printer model, and the second phase determines the combined network system of a printer model and a controller so as to provide the identity mapping. This technique is applied to the color control of a six-color printer using CMYK plus light Cyan and light Magenta.
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