色彩管理中的特性文件连接空间研究

摘  要

特性文件连接空间是基于ICC色彩管理的核心假设，所有的转换工作都是在这部分完成的，因此本文的目的是对色彩管理中的颜色特性描述文件连接空间进行研究。首先介绍了ICC、色彩管理、特性文件等的概念和简要知识。其次分两部分分别对特性文件连接空间和特性文件内的算法以及设备之间的转换方式做了深入研究。在这两部分中由抽象的色空间、匹配方式、色域压缩到具体的算法、转换方式，由内到外的对特性文件和特性文件的载体连接空间做了深入的分析。
通过假定在同一色调面上对色域压缩中的彩度和明度的压缩方式进行了实验，根据实验数据计算出 ，并对实验结果进行分析，得出彩度实验失败的原因——彩度在源色域和目标色域中变化过大。在了解了特性文件的结构、内部内容的基础上，并结合实验提出了现有特性文件存在的色域范围难以确定、色域压缩方式单一等问题以及相应的采用二维或三维压缩算法等进行改进的解决方法，最后提出了建立自动化应用软件、扩大PCS空间等的色彩管理发展方向。研究结果对于更好的理解基于ICC的色彩管理系统和应用色彩管理中的PCS具有指导意义。

关键词：色空间，特性文件，匹配方式，色域
ABSTRACT

The PCS is the core supposition based on the ICC color management, all transformation is completed in this part, therefore the goal of this article is to research PCS of the color management . First this subject introduced the concepts and the knowledge of ICC,CMS, profile and so on. Then researched the PCS, the profile algorithm and the equipment transformation way from two parts. In the end analyzed the profile and PCS from the abstract color space, the match way, gamut compresses to the concrete algorithm and the transformation way .
An experiment about the compression ways of chroma and brilliance was done under the hypothesis on the identical tone. Then the paper calculated   according to the empirical data, analyzed the result of experiment, obtained the reason which chroma experiment defeated that’s because chroma oversized from the source gamut to the goal gamut . Based on the understanding of the profile structure and internal content, proposed the questions of profile about color space which is hard to determine and the simple gamut compression way, gave the solution of using two-dimensional or three-dimensional compression algorithm. Finally proposed the direction of CMS about the establishment of automatic application software, expanded the PCS space and so on. The findings have the guiding sense to understand CMS based on the ICC and PCS better.

Keywords: color space, profile, perceptual render, color gamut

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