【作者】 康一；

【导师】 周世生； 曹从军；

【作者基本信息】 西安理工大学 ， 制浆造纸工程， 2006， 硕士

【摘要】 为了满足印刷中一致性和预期性要求,寻找一种精确实用的L*a*b*与CMYK转换方法就显得尤为重要。本文主要研究基于由日本学者提出的平面理论所建立起来的L*a*b*与CMY(K)转换方程研究。此技术在印刷工艺中的分色,配色技术,印品画面直接检测技术,数字印刷及色彩管理中起着核心的作用。国外在此方面的进步很快,许多这方面的软件如Adobe公司的Photoshop, Agfa公司Foto Tune,及Apple公司的ColorSync等都已经比较成熟。国内也引进了这方面的相应软件,但工程意义上的转换技术还未出现。因此研究L*a*b*与CMYK转换方程具有很高的理论意义和实际应用价值。首先本文对“L*a*b*到CMYK转换”在色彩管理,印刷品版面直接检测,数字印刷,配色和分色中所起的作用进行分析;讨论现存的“L*a*b*与CMYK转换”方法。之后在建立了L*a*b*到CMY的转换模型的基础上,进一步验证了平面理论同样适用四色方程,并运用转换算法将CMY转换为CMYK,初步建立了L*a*b*到CMYK转换模型。随后对模型进行修正,并验证模型的精度,分析误差产生的原因,最终得到比较精确的模型。更多还原

【Abstract】 Satisfying increasingly requirements for consistency and predictability in the printed process, it is important to find a accurate and practical equation from L*a*b* to CMYK. The topic of this paper is to research the conversion from L*a*b* to CMYK, which is based on plane theory .The plane theory is first advanced by Japanese scholars .Not only is the color conversion the key in the color separation and color match, but also in the detecting the printed–paper directly and the digital press. Although the conversion has been developed quickly and some softwares which we have made use of it in practice (like Photoshop which is produced by Adobe , Foto Tune which is produced by Agfa and color sync which is produced by apple) in this aspect has been gotten some success in other countries, there is no great success in our country. So it is something of value in the theory and applied research to solve the problem of conversion from L*a*b* to CMYK.Firstly, I will explain the effect of color conversion in the CMS, in the color separation and color match, in the detecting the printed–paper directly and the digital press; analysis the present existed models from L*a*b* to CMY. Then The plane theory based on optic phenomena presented by a Japanese scholar is testified at first. Then the equation of transition from L*a*b* to CMY is modeled. Based on it, we get that the plane theory is suit for CMYK color space too and make the model from L*a*b* to CMYK. Soon its precision is discussed and the main reasons that influence the equation precision are analyzed . At last a more accurate equation from L*a*b* to CMYK is made.更多还原