Color Prediction Model For Halftone Prints

In the study of a print replication process,the accuracy of the color emersion is the core part to control copied color of the image, and is the key factors to evaluate printing quality. By analyzing the different paths that the incident light traverses in the print, the thesis aims to study the effect produced by the diffuse light on the color reproduction of the plastic print. Here, the diffuse light is divided into two parts: The first part is that light propagates in the ink. Considering the scattering of light in the printing ink, people put forward the directional light energy flow and the diffuse light energy flow generated by the mirror reflection and diffuse function of the prints'interface, when incident light occur in the print color process, and consider that two spectral energy ratio transformed continuously, using radiation equations of Kubelka-Munk two-flux model to correct; The second part is that light traversing ink layer produce the multiple internal reflections in a plastic base. This paper describes the multiple internal reflections rule of the incident light in plastic-base using radiation theory, and establishes a new spectral reflection prediction model of plastic-base prints, as well as further analyzes that light influence the color reappearance of the plastic shoe-soles base which is printed printing ink. Finally, based on the theoretical analysis and data simulation two methods to calculate the spectral reflectance and color changing curves of the plastic print image.This model is of great theoretical significance in printing machinery automatic detection, ink quantity control, color management, and plastic surface and so on various aspects.