Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Fast Zooming and Focusing Technique for Implementing a Real-time Surveillance Camera System

실시간 감시 카메라를 구현하기 위한 고속 영상확대 및 초점조절 기법

  • 한헌수 (숭실대학교 정보통신전자공학부) ;
  • 최정렬 (숭실대학교 대학원 전자공학과)
  • Published : 2004.03.01
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Abstract

This paper proposes a fast zooming and focusing technique for implementing a real-time surveillance camera system which can capture a face image in less than 1 second. It determines the positions of zooming and focusing lenses using two-step algorithm. In the first step, it moves the zooming and focusing lenses simultaneously to the positions calculated using the lens equations for achieving the predetermined magnification. In the second step the focusing lens is adjusted so that it is positioned at the place where the focus measure is the maximum. The camera system implemented for the experiments has shown that the proposed algorithm spends about 0.56 second on average fur obtaining a focused image.

Keywords

References

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