阴极射线管显示器特性化精度及黑点的影响

对SONY G520彩色阴极射线管显示器,实验研究了查找表(LUT)方法的特性化精度以及特性化方程是否考虑黑点对精度的影响,给出了CIELAB,CIE94和CIEDE2000三种色差精度:在黑点强度较大时(CIEXYZ=1.31/1.19/0.97),特性化方程中考虑黑点时分别是0.84,0.40和0.42,不考虑黑点时分别是1.87,0.74和0.76;在黑点强度较小时(CIEXYZ=0.08/0.10/0.12),特性化方程中考虑黑点时分别是0.87,0.41和0.38,不考虑黑点时分别是1.06,0.47和0.44。实验结果说明,显示器设置在黑点强度较大的情况下,特性化方程是否考虑黑点对特性化精度的影响较大;而在黑点强度较小时,特性化方程是否考虑黑点对精度的影响较小。

Accuracy of Colorimetric Characterization and Effect of Black Point for CRT Monitor

The accuracy of colorimetric characterization using the look-up table(LUT) method and effect of the black point were studied,and experiments were performed on a colorful CRT monitors of SONY G520.The experimental accuracy of characterization is presented as three kinds of color difference units of CIELAB,CIE94 and CIEDE2000:(1)0.84,0.40 and 0.42 at considering the black point,and 1.87,0.74 and 0.76 at not considering one in the characterization equation when the intensity of the black point is larger(i.e.CIE XYZ=1.31/1.19/0.97 in experiments);(2) 0.87,0.41 and 0.38 at considering the black point,and 1.06,0.47 and 0.44 at not considering one when the intensity of the black point is smaller(CIE XYZ=0.08/0.10/0.12).This result denotes that whether the effect of the black point should be considered in the characterization equation is related to the intensity of the black point.When the intensity is stronger(weaker) its effect on the accuracy of colorimetric characterization is larger(smaller).