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LCD显示器色彩特性及色彩空间转换方法的研究


全文字数:30000字左右  原创时间:<=2022年

【内容摘要】

LCD显示器色彩特性及色彩空间转换方法的研究


摘  要

本论文在对彩色LCD(liquid crystal display)显示器色彩管理中ICC标准及特征描述文件格式分析的基础上,采用对色彩空间不均匀的划分,将色彩空间划分为512个色块。用美国X-RITE(爱色丽)公司生产的GretagMacbeth Eye-One pro 分光光度计对各色块进行了精确的、多参数的测量。利用实验所得的数据对显示器的色域、时间均匀性、空间均匀性、通道的独立性等显色特性进行了深入的研究和分析。根据ICC提供的均匀色彩空间,定量描述了液晶显示器的颜色特性。以及分析液晶显示器色彩特性对显示彩色图像的影响。用三维查找表(3D-LUT)方法建立了设备颜色空间RGB与标准颜色空间L*a*b*之间的近似转换模型,对三维查找表模型进行了色差计算、精度分析,并对模型进行了精度评价,取得了较好的结果。
彩色LCD显示器将来会逐步的替代CRT显示器,是印前系统的重要组成部分。因此对LCD显示器在的显色性能、色彩空间转换模型精度的研究具有重要的学术价值和应用价值,对彩色LCD色彩特性的评价、LCD用于软打样具有一定的参考价值。

关键词:LCD,颜色特性,色域,查找表,显示器显色特性
ABSTRACT

In this article, the colour space was divided into 512 columns through the uneven division of colour space based on the analysis to the ICC standard and profile file format in the colour management of LCD monitor. Each column has a precise and multi-parameter measurement by using the GretaMacbeth Eye-One Pro Spectrometer of X-Rite incorporation. Then the monitor colour Gamut, time even, space even and independence of the channel were deeply researched and analyzed according the experimental database .The colour profile of LCD monitor is described according the even colour space of ICC. LCD color profile has the influence on the monitor color image through deep analysis. The approximate transform model between device color space RGB and standard color space L*a*b* is established by 3D-LUT method. There is a quite good result through color deviation computation and accurate analysis as well as accurate evaluation to the 3D-LUT model.
Color LCD will be the important part of prepress system, which may take place of the CRT monitor in the future. Therefore, there is significant academic and applied value that research the color performance property and color space transform model in LCD. Meanwhile, there also is certain reference value in evaluation of LCD color property and soft proofing using LCD.

Keywords: LCD, the color characteristics, Gamut, lookup table, color display characteristics

 

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