为了研究哑光和半光两种光泽纸张的印刷样品对中小色差评价的影响, 分别围绕CIE 5个基本颜色中心区域, 对两种纸张制作30个颜色样品, 采用心理物理实验方法中的比较法, 分别测得20名色觉正常的观察者对不同纸张和不同颜色的辨色特性。对四个典型色差公式CIELAB, CIE94, CMC, CIEDE2000和CAM02系列CAM02-LCD, CAM02-SCD, CAM02-UCS三个色差公式用标准化残差平方和(STRESS)性能因子和F检验的方法进行评价和优化。原始色差公式, CIEDE2000色差公式的表现最好, CIELAB色差公式表现最差, CIE94色差公式有较大的改进空间。采用对kL进行优化后的计算结果表明, 随着光泽度的增加, 明度的影响权重在色差计算中有增加的趋势。

In order to reveal the effect of gloss on medium-small color difference evaluation, the printed samples were prepared by ink jet printer on matte, semi-gloss two papers with different gloss levels at the 5 basic CIE color centers. About 30 color samples were made on two kinds of paper; experiment of color difference was carried out by 20 observers with normal color vision based on the psychophysical method of comparison. The standardized residual sum of squares (STRESS) and F test were proposed to test the four classical color-difference formulae, CIELAB, CMC, CIE94, CIEDE2000 and CAM02 series CAM02-LCD,CAM02-SCD,CAM02-UCS. For the original color difference formulae, CIEDE2000 performed the best, and CIELAB color difference formulae performed the worst, while there′s still room for CIE94 for improvement. For the optimized kL values, the higher gloss is, the smaller kL is, which indicated that the lightness difference are more noticeable for the higher gloss printed samples for evaluating color difference.