半色调双面图像的色彩预测Clapper-Yule模型

为了准确地预测印刷图像的光谱反射率,在假定油墨是非散射介质以及油墨的折射率与纸张的折射率近似相等的近似下,利用考虑光在纸基内多次内反射的Clapper-Yule理论和描述多重内反射的网状结构分析模型,建立了同色不同加网周期双面墨像的光谱反射色彩预测模型.同时给出了包含纸基的向下体反射和反面纸基-空气构成界面定向反射作用的单面墨像Clapper-Yule色彩预测修正新模型.

Clapper-Yule Color Prediction Model of Recto-verso Halftone Images

In order to provide a halftone print with an accurate spectral reflectance model the ink is non-scattering and its refractive index is nearly equal to that of papers.On the assumption,a color prediction model of the spectral reflectance for recto-verso halftone images was presented,which have some color but different screening period.Using the classical Clapper-Yule model which take into account multiple internal reflections of light the analysis model of net structure of multiple reflectances in the recto-verso halftone images was proposed.A new Clapper-Yule color prediction model in which the verso intrinsic reflectance of paper substrate and the reflectance of the verso interfaces of air and paper was also present.