대한전자공학회:학술대회논문집 (Proceedings of the IEEK Conference)
- 대한전자공학회 2008년도 하계종합학술대회
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- Pages.825-826
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- 2008
주파수 대역 특성을 이용한 초점 검출 알고리즘
Multi Bands Focus Detection Algorithm
- Choi, Jong-Seong (Institute of TMS Information Technology Yonsei University) ;
- Han, Young-Seok (Institute of TMS Information Technology Yonsei University) ;
- Kang, Moon-Gi (Institute of TMS Information Technology Yonsei University)
- 발행 : 2008.06.18
초록
Focusing is the principal factor that decides the image quality. In the low illuminance condition, captured images with a digital camera usually blurred because the autofocus system of the camera fail to detect the in-focus position. The failure of focusing is due to thermal noise in the captured image. In this paper, we propose a new focus detection algorithm. The proposed algorithm use the new focusing index which is weighted sum of the high-frequency energy and mid-frequency energy. The weight is determined by the local variance of the image. The proposed algorithm performs stable focusing detection with in the low illuminance condition.
키워드