A Study on Improvement of Image Processing for Precision Inner Diameter Measurement of Circular Hole

원형구멍 정밀 내경측정을 위한 영상처리 개선에 관한 연구

  • Park, ChangYong (Mechanical System Engineering, Kumoh National Institute of Technology) ;
  • Kweon, HyunKyu (Mechanical System Engineering, Kumoh National Institute of Technology) ;
  • Li, JingHua (Mechanical System Engineering, Kumoh National Institute of Technology) ;
  • Zhang, Hua Xin (Mechanical System Engineering, Kumoh National Institute of Technology)
  • 박창용 (국립금오공과대학교 기계시스템공학과) ;
  • 권현규 (국립금오공과대학교 기계시스템공학과) ;
  • 이정화 (국립금오공과대학교 기계시스템공학과) ;
  • 장화신 (국립금오공과대학교 기계시스템공학과)
  • Received : 2017.07.26
  • Accepted : 2017.09.18
  • Published : 2017.09.30


In this paper, the measurement of the inner diameter dimension of the circular hole by using a machine vision system was studied. This paper was focused on the theory and key technologies of machine vision inspection technology for the improvement of measurement accuracy and speed of the micro circular holes. A new method was proposed and was verified through the experiments on Gray conversion, binarization, edge extraction and Hough transform in machine vision system processes. Firstly, the Hough transform was proposed in order to improve the speed increase and implementation ease, it demonstrated the superiority of Hough transform and improvement through a comparative experiment. Secondly, we propose a calibration method of the system in order to obtain exactly the inner diameter of the circular hole. Finally, we demonstrate the reliability of the entire system as a MATLAB-based implementation of the GUI program, measuring the inner diameter of the circular hole through the circular holes of different dimensions measuring experiment.



Supported by : 금오공과대학교


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