一种印刷品套准检测方法研究

摘要

In order to solve the problems of the accuracy about four-colors overprint markers at online detection, the color image segmentation was investigated. The relationship between RGB and L* a* b* was established. The methods of threshold and ISODATA image segmentation were presented. The color image segmentation was realized by Matlab, and the accuracy of four-colors overprint were evaluated. The experimental results show that the method can extract calculate the overprint error,and it can be used in the real-time print-detect system for Web offset printing.%为解决在线检测四色套准精度的问题,将彩色图像分割技术应用到套准精度的检测中.建立了RGB和L*a*b*之间的关系,提出了阈值分割法和ISODATA聚类法.在Matlab软件中实现了印刷品套印图像的彩色分割,以及套印精度的计算.对四色套印检测的准确性进行了评价.研究结果表明该方法能够准确地计算出套印误差,可用于在线检测印刷品缺陷的系统中.