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Fingerprint Image Enhancement Based on a Directional Filter  

오상근 (경북대학교 영상신호처리연구실)
박철현 (경북대학교 영상신호처리연구실)
윤옥경 (경북대학교 영상신호처리연구실)
이준재 (동서대학교 인터넷공학부)
박길흠 (동서대학교 인터넷공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.27, no.4A, 2002 , pp. 345-355 More about this Journal
Abstract
This paper describes a new method of directional filter-based analysis for fingerprint enhancement. Fingerprint cages can be represented by direction field of regular structure of ridge patterns. The dominant directional component of ridge plays a very important role in pre-processing steps of fingerprint image analysis such as ridge's linking and noise removal for minutiae extraction. A directional filter bank analyzes input image into directional subband images and synthesizes them to the perfectly reconstructed image. In this paper, a new fingerprint enhancement algorithm based on a directional filter bank is proposed. The algorithm decomposes the fingerprint image into subband images in the analysis stage, accomplishes an enhance procedure by processing subband images in the enhance stage and synthesizes them to the enhanced image in the synthesis stage.
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