应用科学学报 ›› 2014, Vol. 32 ›› Issue (6): 617-624.doi: 10.3969/j.issn.0255-8297.2014.06.011

• 信号与信息处理 • 上一篇    下一篇

应用对称匹配的PET 瓶瓶盖缺陷实时检测

王贵锦1, 刘博1, 何贝1, 张树君2, 孟龙2   

  1. 1. 清华大学电子工程系,北京100084
    2. 山东明佳包装检测科技有限公司,山东泰安271022
  • 收稿日期:2013-07-07 修回日期:2014-04-30 出版日期:2014-11-28 发布日期:2014-04-30
  • 作者简介:王贵锦,博士,副教授,博导,研究方向:图像/视频处理、分析以及应用,E-mail: wangguijin@tsinghua.edu.cn
  • 基金资助:

    国家自然科学基金(No.61132007, No.61271390)资助

Real-Time PET Cap Defect Inspection Based on Symmetry Match

WANG Gui-jin1, LIU Bo1, HE Bei1, ZHANG Shu-jun2, MENG Long2   

  1. 1. Department of Electronic Engineering, Tsinghua University, Beijing 100084, China
    2. Shandong Mingjia Packaging Inspection Technology Company Limited, Taian 271022, Shandong Province, China  
  • Received:2013-07-07 Revised:2014-04-30 Online:2014-11-28 Published:2014-04-30

关键词: PET瓶瓶盖, 对称匹配, 图像配准, 实时检测

Abstract: On a high-speed production line, tilt of bottles, burrs on the bottleneck, and residual droplets after
cleaning affect accuracy of PET bottle inspection. To deal with the problem, a bottle detection algorithm
based on symmetry matching is proposed. Considering symmetry of the bottle image, the bottle axis can
be determined accurately by registering the images before and after horizontal flipping. Thus tilts can be
compensated. Burrs and droplets are eliminated by using correlation of pixels on both sides of the axis.
Consequently, the support rings can be detected and bottle caps can be classified precisely. Experimental
results show high accuracy, speed and robustness of the proposed algorithm as compared with the state-of-theart
techniques. For images sized 640×480, the average detection time is 27.4 ms, which meets the requirement
of high-speed production lines.

Key words: PET cap, symmetry matching, image registration, real-time inspection

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