半色调荧光图像的光谱反射与透射模型

荧光油墨半色调印刷品的显色预测规律是彩色成像领域内十分关键的课题。把荧光半色调印刷品反射出来的光分成两个独立的部分,即由最初入射光组成的主光流和由于吸收了主光流而产生的荧光流;并且采用了一个指数矩阵来描述墨层产生的荧光光强,从而得出了荧光半色调图像色彩的光反射规律。考虑到入射光中从一种颜色油墨入射后再由同色油墨出射的概率要比从其它色油墨出射的概率要大的事实,讨论中引入权重因子描述从同色油墨出射部分与从整个表面出射部分比例不同的现象,建立了荧光油墨半色调图像的Clapper-Yule新光谱反射率模型。

Clapper-Yule Spectral Reflection and Transmission of Halftone Color Fluorescent Image

The color prediction law of fluorescent ink half tone is a pivotal problem in the region of color imaging processing.The reflective law of color fluorescent ink half tone is generalized by utilizing the idea that the reflected light by fluorescent print is divided into two parts: primary streams which consist of originally incident light and fluorescent streams which are created by absorption of the primary stream.And an exponential matrix modelizing the layer of fluorescent ink is utilized to compute the energy of fluorescence.The weighted factor is introduced to describe the phenomenon that the proportion is different between the exit light from the same colorant and from whole surface by taking into account 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.And an improved spectral reflection Clapper-Yule model is presented for the fluorescent ink halftone.