数码打样色彩质量评价方法的研究

目的研究数字化工作流程条件下数码打样色彩复制质量精准高效的评价方法。方法将IT8.7/4色表1617个色块进行分区,并分析各分区色差、网点扩大和L值阶调复制曲线与数码样张色彩质量的内在关系,最后统计影响数码样张色彩质量的关键点。结果实验表明1617色表各分区平均色差都在0.5左右,最大色差在3以内,且L值阶调复制曲线光滑平整,这说明色彩复制质量较好。但黄色的点色差比较大,复制曲线不光滑,阶调丰富性再现不好,故应调节与黄相关的参数,提高色彩复制质量。结论综合色差、网点扩大和L值阶调复制曲线与数码打样色彩质量之间的关系,验证了色彩质量评价方案的可行性和精准性。

Research of the Digital Proofing Color Quality Evaluation Method

Objective To research the accurate and efficient evaluation methods of the digital proofing color reproduction quality at digital workflow. Methods The 1617 color piece of the IT8. 7 / 4 color table was divided and intrinsic relations between the color difference of each partition, dot enlargement, L value replication curve and the digital proof color quality were analyzed. The key points which affect the digital sample color quality were counted. Results The experiment showed that the average color difference of each partition were around 0. 5, with a maximum color difference of less than 3, and the L replication curve was smooth, which meant that the color reproduction quality was good. However, the yellow dot color difference was big, the replication curve was not smooth, and gradual richness reappearance was bad. Therefore, the parameters related to yellow should be adjusted to improve the color reproduction quality. Conclusion The relationship between color difference, dot enlargement, L value replication curve and the digital sample quality proves the feasibility and precision of the color quality evaluation scheme.