基于地图色域特征的色域映射算法研究  

Gamut Mapping Algorithm for Cross-Media Map Color Reproduction Based on Gamut Characteristics

作　　者：赵旭辉[1] 刘诗德[1] 黎达[1] 蒋浩源 

机构地区：[1]信息工程大学 [2]75711部队

出　　处：《测绘科学技术学报》2015年第5期515-520,共6页Journal of Geomatics Science and Technology

摘　　要：分析了地图色彩跨媒介传递出现偏色现象的原因。对地图色域特征进行了研究,提出了一种基于地图色域特征的地图种类划分方法,并指出针对每类地图设计相应色域映射算法的重要性。设计了一种面向线型设色地图的色域映射算法,该算法引入Sigmoidal型函数对地图进行明度压缩,对其色域点拟合出一条直线,把直线与明度轴交点作为映射中心点进行色域压缩。将该算法与ICC绝对色度意图映射法和SGCK算法进行对比,结果表明该方法较好于前两者并能够很好保持地图的整体色貌及颜色对比度,可以提高地图跨媒介色彩再现效果。Some phenomena like color-cast might happen in map color cross-media transmission was analyzed. A method of map classification was proposed based on characteristics of map gamut due to some research, and the importance of designing appropriate gamut mapping method for each type of map was pointed out. A new gamut mapping algorithm was designed for the linear map coloring, Sigmoidal function was introduced on map lightness compression, and a line was fitting using its color point, the intersection of the line and the lightness axis was used as a center of gamut mapping. Compared with ICC absolute colorimetric intend method and SGCK algorithm, the results showed that this method was better than the first two, it was able to maintain map overall color appearance and color contrast, and could enhance the color reproduction in map cross-media transmission.

关 键 词：地图色域 跨媒介 色域映射 Sigmoidal型函数 直线拟合 

分 类 号：P288[天文地球—地图制图学与地理信息工程]