실시간 감시 카메라를 구현하기 위한 고속 영상확대 및 초점조절 기법Fast Zooming and Focusing Technique for Implementing a Real-time Surveillance Camera System
- Other Titles
- Fast Zooming and Focusing Technique for Implementing a Real-time Surveillance Camera System
- Authors
- 한헌수; 최정렬
- Issue Date
- Mar-2004
- Publisher
- 한국정밀공학회
- Keywords
- Surveillance system (감시시스템); Zooming (영상확대); Focusing (초점조절); Focus value (Focus 값); Facial image (얼굴 영상); Surveillance system (감시시스템); Zooming (영상확대); Focusing (초점조절); Focus value (Focus 값); Facial image (얼굴 영상)
- Citation
- 한국정밀공학회지, v.21, no.3, pp.74 - 82
- Journal Title
- 한국정밀공학회지
- Volume
- 21
- Number
- 3
- Start Page
- 74
- End Page
- 82
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/20408
- ISSN
- 1225-9071
- 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 for obtaining a focused image.
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