Journal of Institute of Control, Robotics and Systems (제어로봇시스템학회논문지)

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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Robust Defect Size Measuring Method for an Automated Vision Inspection System

영상기반 자동결함 검사시스템에서 재현성 향상을 위한 결함 모델링 및 측정 기법

  • Joo, Young-Bok (Department of Computer Science & Engineering, Korea University of Technology & Education) ;
  • Huh, Kyung-Moo (Department of Electronic Engineering, Dankook University)
  • 주영복 (한국기술교육대학교 컴퓨터공학부) ;
  • 허경무 (단국대학교 전자공학과)
  • Received : 2013.08.20
  • Accepted : 2013.10.04
  • Published : 2013.11.01
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Abstract

AVI (Automatic Vision Inspection) systems automatically detect defect features and measure their sizes via camera vision. AVI systems usually report different measurements on the same defect with some variations on position or rotation mainly because different images are provided. This is caused by possible variations from the image acquisition process including optical factors, nonuniform illumination, random noises, and so on. For this reason, conventional area based defect measuring methods have problems of robustness and consistency. In this paper, we propose a new defect size measuring method to overcome this problem, utilizing volume information that is completely ignored in the area based defect measuring method. The results show that our proposed method dramatically improves the robustness and consistency of defect size measurement.

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References

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