计算机工程与应用 ›› 2009, Vol. 45 ›› Issue (19): 210-212.DOI: 10.3778/j.issn.1002-8331.2009.19.065

• 工程与应用 • 上一篇    下一篇

套准偏差计算分色归类方法研究

刘京会1,王跃宗2   

  1. 1.石家庄经济学院 公共管理学院,石家庄 050031
    2.北京工业大学 机械工程与应用电子技术学院,北京 100124
  • 收稿日期:2008-12-11 修回日期:2009-02-23 出版日期:2009-07-01 发布日期:2009-07-01
  • 通讯作者: 刘京会

Study on color division model about register calculation

LIU Jing-hui1,WANG Yue-zong2   

  1. 1.School of Public Management,Shijiazhuang University of Economics,Shijiazhuang 050031,China
    2.College of Mechanical Engineering and Applied Electronic Technology,Beijing University of Technology,Beijing 100124,China
  • Received:2008-12-11 Revised:2009-02-23 Online:2009-07-01 Published:2009-07-01
  • Contact: LIU Jing-hui

摘要: 针对彩色印刷领域较常用的四原色(青色C、品红M、黄色Y和黑色B)叠印标记图像,提出了像素分色归类模型和套准偏差计算方法。通过图像分析给出四种原色及其复合色像素的分色归类模型,在此基础上检测四种原色套准标记的边缘像素,结合最小二乘和Hough变换法拟合套准标记的多条边缘直线,在图像中计算四种原色特征直线之间的偏移距离。实验结果表明该方法自动检测套准偏差的精度高于20 ?滋m,符合国家印刷行业标准规定的套准精度要求,适用于以C、M、Y、K合成原理为基础的双色、四色胶印系统。

关键词: 图像分析, 套准, 最小二乘拟合, Hough变换

Abstract: In this paper,color division model and automatic detected method of color registers are proposed for register mark images of four kinds of initial color(cyan,magenta,yellow and black) that overlaps each other.Based on image analysis theory,a color recognition model for cyan pixels,magenta pixels,yellow pixels,black pixels and their complex color pixels is derived.The next step is that edge pixels of color marker are extracted,and their structural lines are approximated by least squares approximations and Hough transforms.Experiments indicate that precision of 20 micron is obtained when this automatic detected method of color register is applied.And this accords with general printing technology standard of china.This method can be applied to two or four color printing system via CMYK combination.

Key words: image analysis, register, least squares approximations, Hough transforms