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

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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Correction Method for Geometric Image Distortion and Its Application to PCB Inspection Systems

인쇄회로기판 검사를 위한 기하학적 영상 왜곡의 보정 방법

  • 이완영 (충북대학교 대학원 제어로봇공학과) ;
  • 박태형 (충북대학교 전기전자컴퓨터공학부)
  • Published : 2009.08.01
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Abstract

The geometric distortion of image is one of the most important parameters that take effect on the accuracy of optical inspection systems. We propose a new correction method of the image distortion to increase the accuracy of PCB inspection systems. The model-free method is applied to correct the randomly distorted image that cannot be represented by mathematical model. To reduce the correction time of inspection system, we newly propose a grid reduction algorithm that minimize the number of grids by the quad-tree approach. We apply the proposed method to a PCB inspection system, and verify its usefulness through experiments using actual inspection images.

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References

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