Deshpande Kiran, Green Phil, Pointer Michael R
Opt Express. 2014 Dec 29;22(26):31786-800. doi: 10.1364/OE.22.031786.
This paper is aimed at reproducing the solid spot colours using the n-colour separation. A simplified numerical method, called as the spot colour overprint (SCOP) model, was used for characterising the n-colour printing process. This model was originally developed for estimating the spot colour overprints. It was extended to be used as a generic forward characterisation model for the n-colour printing process. The inverse printer model based on the look-up table was implemented to obtain the colour separation for n-colour printing process. Finally the real-world spot colours were reproduced using 7-colour separation on lithographic offset printing process. The colours printed with 7 inks were compared against the original spot colours to evaluate the accuracy. The results show good accuracy with the mean CIEDE2000 value between the target colours and the printed colours of 2.06. The proposed method can be used successfully to reproduce the spot colours, which can potentially save significant time and cost in the printing and packaging industry.
本文旨在通过n色分色来再现实地专色。一种简化的数值方法，称为专色叠印（SCOP）模型，被用于表征n色印刷过程。该模型最初是为估计专色叠印而开发的。它被扩展用作n色印刷过程的通用正向表征模型。基于查找表的逆向打印机模型被实现以获得n色印刷过程的分色。最后，在平版胶印工艺上使用7色分色再现了实际的实地专色。将用7种油墨印刷的颜色与原始实地专色进行比较以评估准确性。结果显示出良好的准确性，目标颜色与印刷颜色之间的平均CIEDE2000值为2.06。所提出的方法可以成功地用于再现实地专色，这有可能在印刷和包装行业节省大量时间和成本。
