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방향성 Fourier 필터링에 의한 지문 영상에서의 방향정보 추출
이형설,이동원,신태민 慶尙大學校 工科大學 自動化및컴퓨터應用技術硏究所 1995 自動化 및 컴퓨터應用技術 Vol.2 No.1
In this paper, a new method of ridge orientation extracting from fingerprint images is described, based upon nonstationary directional frequency domain filtering. A comparison is made with the enhanced images in spatial domain used within the automated fingerprint identification system (AFIS) developed by the KIA Information Systems CO., LTD. Use of the proposed enhancement method leads to significant improvements in the speed and accuracy of the AFIS.