【作者】 刘诗德；

【导师】 孙群；

【作者基本信息】 解放军信息工程大学 ， 地图制图学与地理信息工程， 2009， 博士

【摘要】 以数字化为标志的当今出版印刷技术,已全面从传统的模拟或模数混合工艺向全数字化生产工艺转变,色彩管理与数码打样是全数字化印刷流程的重要组成部分。论文较详尽地阐述了色彩管理与数码打样的基本理论以及质量控制技术,结合苏州影像图集、地理图集、专用地图等研究项目,在四色印刷打样质量控制和地图专色数码打样色彩匹配等方面进行了大量的研究与实践,首次提出了匹配印刷实地密度标准的线性化控制模式和逆向色彩匹配法获取印刷特性文件,对地图专色数码打样进行了四色分量修正与色度逼近校正方法,并建立了地图专色打样转换模型。本论文完成的主要研究工作有以下几个方面:(1)在测绘系统内首次构建了基于ICC标准的数码打样质量控制机制,为测绘生产单位各部门之间搭建了色彩一致性的标准平台,提出并实现了测绘生产单位数码打样解决方案。(2)对数码打样质量控制关键技术和存在的问题进行了深入的剖析,首次提出使用匹配印刷实地密度标准的控制方法进行输出设备的基本线性化和逆向色彩匹配法获得印刷特性文件等创新式控制手段与方法,在实践中得到了可靠的验证。通过对数码打样校正,部分单位数码打样与印刷的平均色差做到了Δ_E ab=1NBS左右,达到很好的色彩匹配效果。(3)在CTP印前系统数码打样环境和EFI XF数码打样软件环境下进行专色打样色彩匹配的研究,分别采用了CMYK修正和L*a*b*逼近法提高专色数码打样颜色匹配效果,最终专色数码打样平均色差做到了ΔE a*b=1NBS左右,达到了专色打样很好的颜色匹配效果,并建立了基于特定环境的专色数码打样转换算法。(4)设计了用于长期监控印刷特性的颜色控制条,建立了长效的印刷特性跟踪反馈机制,并准实时更新数码打样环境。(5)分析了建立测绘行业标准印刷ICC特性文件的可行性并提出了具体实施方案。(6)在数码打样阶段性和总体评价方面进行了理论与实践探讨,提出了评价方法与指标,制定了数码打样整体评价色差标准。更多还原

【Abstract】 Today’s publication and printing technology has been greatly changing from the traditional analog or mixed analog-to-digital technology to all-digital production process. With color management, digital proofing has become an important component of the all-digital printing workflow. In this thesis, the basic principles and quality control techniques of color management and digital proofing are set forth and discussed. Research work is carried out on the general proofing quality control and spot color proofing program. The main research work has the following aspects:(1) The quality control mechanism for digital proofing based on ICC standard has been built in surveying and mapping industry for the first time, so the color consistency platform can be followed by the departments in the mapping units.(2) The key technologies and the present questions are analyzed and discussed in-depth. Effective ways of controlling the quality of digital proofing in all stages are employed during practice. A new basic linearization method of matching printing standard ink densities and the converse way of obtaining press ICC profile are proposed at the first time, and have been proved by the practice. The average color difference between the proof and press is near 1 NBS, which achieved a perfect color matching.(3) Using Heidelberg prepress digital proofing system and EFI XF digital proofing software environment respectively, spot color proofing was achieved to reduce the average color difference greatly. Two methods were introduced, one is CMYK values correction and the other L*a*b* values approaching. With satisfaction, the eventual average color difference for spot-color digital proofing is near 1 NBS. Based on the spot color proofing practice, a spot-color conversion algorithm for proofing was set up in a specific environment.(4) A mini print color control bar was designed and based on this a feedback mechanism was set up to trace the printing characteristics continually. So, the digital proofing environment could be updated near real time.(5) ICC profiles of presses were analyzed to approve the feasibility of establishing a standard press ICC profile, and a specific implementation plan was proposed. (6) Evaluating methods were put forward and used for the digital proofing stages and the final proof. According the present printing and measuring conditions, evaluation grading was set for discussion.更多还原