Color Prediction Model Based On K-M Theory

In the research of Printing reproduction, we need fundamentally to investigate the color mechanism of prints and establish a more perfect color prediction model system in order to promote the development of color forecast, perfect color management system and the promotion of related printing equipment .Assumning the incidence flow of the prints will meet with the mirror reflrction and diffusion effect on the air-paper interface and the air-ink interface.So in this article we first amended the incidence flow into directional light flow and diffuse light flow . Secondly by taking into account these two parts of light flow in the printed materials continue to occur scattering and absorption in the transmission process so causing the change of conversion ratio in the two parts of light energy . Studying the color prediction of halftone prints with rough substrate by using the radiative transfer equation and Kubelka-Munk four-flux theory we establish the eight-flux color prediction model on rough substrate which adapt to the phenomenon on the interface and diffusion effect. Finally, using a new mathematical methods to obtaine the spectral reflectance of halftone prints and through contrasting with the spectrum of ink we can find the higher accuracy of the new model on the color prediction of halftone prints on rough substrate.