色彩管理中灰平衡数据控制

目的针对Photoshop色彩管理中数码样张与印刷样张存在较大的色差问题,提出了修正ICC Profile文件的方法。方法以灰色为研究对象,利用数码打样机分别输出了GMG和Photoshop色彩管理流程下的数码样张,分析比较了2种流程下数码样张的色差特性,并利用ProfileEditor软件对印刷ICC Profile文件进行灰平衡数据的调整与修正。结果在Photoshop色彩管理流程中使用调整后的ICC Profile文件,使仿铜版纸的数码样张中性灰的平均色差由原来的8.0863降低到4.2284,仿特种纸的数码样张中性灰的平均色差由原来的10.1063降低到5.5908。结论优化ICC Profile文件中的灰平衡参数,能够使数码样张与印刷样张获得更小的色差,提高了颜色再现的准确性。

Adjustment and Optimization of Gray Balance in Color Management

Objective In order to solve the problem of the significant color difference between digital samples and printing samples in Photoshop color management, a new method was put forward to correct ICC Profile. Methods The gray color difference characteristics of digital samples, as the research object, were analyzed based on both GMG and Photoshop color management workflow. Furthermore, the gray balance data in ICC Profiles was optimized using ProfileEditor software based on the theory above. Results Using the adjusted ICC Profile in the Photoshop color management process, the average color difference of neutral gray was decreased from 8.0863 to 4.2284 on imitation coated paper, and decreased from 10.1063 to 5.5908 on imitation specialty paper. Conclusion The color differences between the printing samples and digital samples were decreased by optimization of gray balance parameters in ICC Profile, which improved the accuracy of color reproduction.