CIECAM02色貌模型的视觉均匀性分析与模型优化  

Visual-Uniformity Analysis of CIECAM02 Color Appearance Model Optimization

作　　者：刘真[1] 孟凡亚[2] 解娴婷[2] 

机构地区：[1]上海理工大学出版印刷与艺术设计学院,上海200093 [2]南京林业大学化学工程学院印刷工程系,江苏南京210037

出　　处：《影像科学与光化学》2009年第2期128-134,共7页Imaging Science and Photochemistry

基　　金：江苏省自然科学基金资助项目(BK2006210)

摘　　要：在Windows Vista操作系统中,微软公司新发布了WCS色彩管理系统替代原有的ICC色彩管理系统.新色彩管理系统的核心技术之一是:利用CIECAM02色貌模型置换ICC色彩管理中的CIELAB颜色模型,从而可以将人眼观察色彩时的环境等因素作为转换参数纳入色彩信息传输与再现的计算,使得在不同媒体或设备之间的色彩信息传输,从保证色度(chromaticity)测量值的正确传输转换为保证视觉效果的正确传输与再现.但实验证明,CIECAM02仍然存在视觉均匀性不够理想的缺点,这将会影响媒体或设备之间色彩信息转换的正确计算.本文首先利用国际上通用的四种色差评估数据(BFD、Leeds、RIT-DuPont和Witt)对CIECAM02进行局部视觉均匀性修正,优选出经过Witt修正后的明度(lightness)和Leeds修正后的彩度(chroma),然后再利用孟塞尔新标数据进行CIECAM02色貌模型整体均匀性修正.最后,用孟塞尔新标数据对修正前后的CIECAM02色貌模型进行检验.结果表明,修正后的CIECAM02色貌模型视觉均匀性无论是局部还是整体都有较大的改善.该实验成果不仅可以在计算机操作系统以及软件的色彩管理系统中直接应用,还可以为今后均匀颜色空间的研究提供参考.In Windows Vista operating system, a new WCS Color Management System （CMS） is released to replace the original ICC CMS. One of the core technologies of the new CMS is that the CIECAM02 color appearance model is used to substitute the CIELAB color model of the ICC CMS, so the parameters such as surrounding, illuminant and other factors are included in the calculation of the color transformation and reproduction, By this way the correct transformation and reproduction of the color measured values is converted to the correct transformation and reproduction of the color vision effects in the color communication between the different media and equipments. But it is proved that the CIECAM02 is not an ideal visual uniformity color space which affects the correct calculation of the color conversion between the media or equipments. Firstly, the partial visual uniformity of the CIECAM02 is revised using the four international universal Color Difference Datasets （BFD, Leeds, RIT-DuPont and Witt）, and the lightness which is revised by Witt data and chroma which is revised by Leeds data are selected. Secondly, the integrity visual uniformity of the CIECAM02 is revised using the Munsell Renotafion Data. Finally, the uniformity of the CIECAM02 and the revised CIECAM02 are investigated using the Munsell Renotation Data, and the results show that, the revised CIECAM02 is greatly improved in terms of partial and entire space. The experiment results not only can be directly applied in the CMS of computer operating system and software, but also can be referenced for the future research of the uniform color spaces.

关 键 词：均匀颜色空间 CIECAM02 色差评估数据 孟塞尔新标数据 

分 类 号：TP316.7[自动化与计算机技术—计算机软件与理论]