Clapper-Yule Model Of Color Fluorescent Halftone Prints

The color prediction low of fluorescent ink halftone is an important problem in the region of quality control. The present study aims at predicting the spectral reflection of fluorescent ink halftone which is a uniform samples and can be different concentrations, and finding the parameters which can adjust the color difference. It is an emphasis to build the prediction model of fluorescent halftone print under the glossy interface in the thesis, the light which is reflected by color fluorescent halftone is divided two parts to research: the primary stream which consists of originally incident light and fluorescent stream which is created by absorption of the primary stream, and the two parts are not correlative and influencing each other. A matrix exponential modelizing the layer of fluorescent ink is utilized to compute the energy of fluorescence. Because of the fact that proportionally more incident light through a given colorant surface is reflected back onto the same colorant surface than onto other colorant surfaces. Classical Clapper-Yule model is improved by a weighted mean between a component of the incident light that exits through the same colorant as the colorant from which it enters and a component which exits from all colorants. A new spectral reflection model for a uniform fluorescent ink halftone with different concentration is presented., The model which is built under the glossy interface is extended to rough interface in succession, characterizing the rough interface by Torrance-Sparrow microfacet model and computing the parameters which are interrelated with the roughness. The new model under the rough interface is built. At last, the new models are modeled and computed by MATLAB, and the rationality of models are analyzed from the angle of theory, and the difference of prediction reflectance by two models under the glossy and rough interface are presented.