【作者】 董玉珍；

【导师】 刘世昌；

【作者基本信息】 西安理工大学 ， 制浆造纸工程， 2002， 硕士

【摘要】 印刷图像的颜色在复制系统中，需要在各种不同的设备之间进行传递，而彩色复制的一个难点，就是如何确定各组分油墨(即各色版)的网点覆盖率。本课题主要对从XYZ到CMY颜色空间的转换进行了研究。又因为在实际印刷的过程中，所使用的设备不同，印刷材料也不同，针对不同的生产条件，如何来正确的确定网点的输入值，从而精确再现原稿色彩，是当前存在的一大难题，这也是本课题的研究目标。 本课题首先对几种颜色空间及其各自的特点进行了阐述，分析并讨论了几种从XYZ到CMY颜色空间转换的方法，然后针对现有的转换算法存在的不足之处，对影响网点面积率计算值的各种因素进行了分析，引入了“三通道”理论，在此基础上，建立了从XYZ到CMY色空间转换的新模型。为了验证本文提出的转换模型的精确性，在完成理论分析的基础上进行了实验验证，验证结果表明，本文提出的转换模型具有较好的精确性，达到了预期的效果。 最后，本课题开发了具有自己特色的“我的Photoshop”应用软件，把本课题 西安理工大学硕士学位论文一的理论研究成果应用到“我的 PhotOShop”中去，实现了用户“根据生产体条件建立 PROFILE”的功能，本软件具有一定的实用价值。更多还原

【Abstract】 The color of printing image needs to be transformed among different equipments in copy system, and that how to get the dot area of each primary color (namely each separate plate) is difficult in the color printing . This paper deals with the transformation mostly from "XYZ" color space to"CMY" color space.As well as,because in the actual pinting the used equipments and the printing materials are different, how to get correctly input value of dot and reproduce accurately the color of original according to different produce condition is a difficult problem at present, which is also the research target of this paper.This paper firstly described several color spaces and their respective characters and discussed several ways used for the transformation from"XYZ" color space to "CMY" color space, and then analysed many kindsof factors that influence the calculated dot area aiming at the shortage of existing transformation, introduced "three channels" theory, based on this theory, the new model of color space transformation from "XYZ" color space to "CMY" color space was established. In order to verify the accuracy of the transformation model, the paper made experimental verification. The result shows that the transformation model has satisfied accuracy and gains expected effect.Finally, the paper developed application software with myselfCharacteristic whose name is "My Photoshop" , the theory results of thispaper were applied to this software, and realized the function that"Establishing Profile According to Production Condition" , this softwarehas practical value.更多还原