颜色空间的研究与分析.doc

 PAGE 2 摘要  PAGE II 摘要 从颜色空间和色差公式发展的进程看，有关颜色空间的研究主要向均匀化发展．尽量使色差与人眼睛的视觉色差相一致，特别是对小色差的标定变得越来越精细．本论文主要对现在主要的均匀色彩空间做简要的分析研究，对比各自色差公式，找出其主要存在的优缺点．通过对比色差公式和图表来表现各颜色空间，将显色系统表示法和混色系统表示法中主要的颜色空间进行对比，包括CIE1976L*a*b*颜色空间，CIE1976L*u*v*色度空间，NC-ⅢC均匀颜色空间，L*a*b*-N均匀颜色空间，CIECAM02-UCS均匀颜色空间． 本文经过对各个颜色空间的简要研究和对比，指出了现在颜色空间领域的主要成果，并分析了各自的不足．虽然目前均匀空间的均匀性已有很大的改善，且系统与设备无关，色度值和明度值（阶调）可以独立调节，而且当颜色的色差大于视觉的识别阈限（恰可察觉）而又小于孟塞尔系统中相邻两级的色差时，能较好地反映物体色的心理感受效果．虽然目前这个领域的研究成果非常丰富，但是并没有一种很完备的均匀颜色空间存在．各颜色空间的明度的均匀性较好，而色度的均匀性较差；新的颜色空间NC-ⅢC和L*a*b*-N色度的均匀性优于CIE1976L*a*b*，CIE1976L*u*v*和CIECAM02-UCS．所以，NC-ⅢC和L*a*b*-N是均匀性较为理想的两种颜色空间． 关键词：颜色表示系统；色差；均匀颜色空间；Abstract Abstract Abstract ABSTRACT With the development of the color space and formula of achromatic difference,the research of color space tends to homogenizing,which makes achromatic difference accord with visual achromatic difference of human being to the greatest extent.Especially,it makes the calibration among small color differences become more sophisticated.This thesis focuses on brief analysis and study on major color spaces,and finds out the existing merit and demerit by the comparation of their formula of achromatic difference. This thesis presents different color spaces clearly by comparing the formula and schematics of achromatic difference.It compares major color spaces in the Color Appearance System and Color Mixture System,for example,CIE1976L*a*b* color space,CIE1976L*u*v* color space,NC-ⅢC color space,L*a*b*-N color space,and CIECAM02-UCS color space. This article passes through to each color space brief research and the contrast,had pointed out the present color space domains main achievement,and has analyzed the respective insufficiency.Although the present even spaces uniformity had the very big improvement,and the system has nothing to do with the equipment,the chromaticity value and the brilliance value (contrast)may the independent control,moreover, when the color chromatic aberration is bigger than visual the recognition threshold(