目的 目前色彩管理模型或是注重呈色原理分析,或是仅控制模型的输入输出两端,导致色彩转换精度不高。鉴于此在分析呈色原理的基础上,提出一种CRT显示图像色彩管理新模型。方法 采用标准色靶作为实验样本,结合显示器的呈色原理,以色靶的彩色梯尺区色块代表整个色空间用以推导模型,解决了显示器色彩校正中样本色块选择的难题;随后,重新解释尤尔—尼尔森方程的参数,使原本只适用于印刷网点图像的呈色模型也适用于非印刷网点图像;其次,结合尤尔—尼尔森方程和显示器呈色原理,利用修正后的缩张拟合算法分单色、双色和3色逐步修正和补偿色彩误差,推导出CRT显示器的色彩管理新模型。结果 本模型能够提高CRT显示器的色彩管理精度54%以上,能够用于工程实际中的CRT显示器色彩管理。结论 借助于其他图像设备的呈色原理,本文模型不仅能提高色彩转换精度,也具备较好的参考借鉴价值。

Objective Present color management model pays attention to the color rendering principle analysis of different color devices. Alternatively, it only controls the input and output of the model that makes color conversion accuracy low. With regard to these problems, a new color management model is presented by analyzing the color rendering principle of CRT monitor. Method The standard color target is taken for experimental sample, and the paper substitutes color blocks in color shade district for complete color space to solve the difficulty of sample color block selecting in color adjustment of CRT monitor by deducing final color management model. Second, parameters of Yule-Nielson equation are reinterpreted. Thus, it can be used for nonprinting dot image, which can only be used for printing dot image originally. Then, the color management model for CRT monitor is deduced gradually though single color, double color, and tricolor conversion correction based on corrected contraction-expansion fitting and color rendering principle of CRT monitor. Result Experimental results show that the model can improve color management accuracy of CRT monitor above 54% and can be practically used in its color management. Conclusion With the help of the color rendering principle of other color devices, the model has superior reference value for color management.