한국통신학회논문지 (The Journal of Korean Institute of Communications and Information Sciences)

  • 제27권8A호
  • /
  • Pages.796-804
  • /
  • 2002
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  • 1226-4717(pISSN)
  • /
  • 2287-3880(eISSN)
한국통신학회 (The Korean Institute of Commucations and Information Sciences)
권호 표지

방향성필터뱅크 기반의 새로운 지문영상의 처리 방법

A New Method of Fingerprint Image Processing Based on a Directional Filter Bank

  • 오상근 (경북대학교 전자공학과 영상신호처리연구실) ;
  • 이준재 (동서대학교 인터넷공학부) ;
  • 박길흠 (경북대학교 전자공학과 영상신호처리연구실)
  • 발행 : 2002.08.01
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초록

본 논문에서는 방향성필터뱅크(Directional Filter Bank; DFB)에 기반하여 지문영상을 해석하여 처리하는 새로운 방법을 제안한다. 지문에서 융선의 방향성는 방향성지도를 구성하고, 이로부터 방향성 필터링을 통한 영상 향상을 행하는 등 지문 영상을 해석하는 전처리과정에서 매우 중요한 요소이다. DFB는 입력영상을 방향성대역영상으로 분해한 다음 이로부터 원영상을 완전하게 복원하는 필터이다. 본 논문에서는 DFB를 이용하여 지문영상을 여러 개의 방향성대역영상으로 분해하고, 이로부터 국부 방향성 에너지를 정의한 다음, 이를 기반으로 방향성지도의 제작, 영상분할, 특이점추출 및 영상개선의 처리과정들을 일관되게 수행하는 알고리듬을 제안한다.

This paper presents a new algorithm of fingerprint image analysis and processing using directional filter bank(DFB). The directional components of ridge is very important in pre-processing steps of fingerprint image processing such as image enhancement by directional filtering followed by estimationg the directional image of ridge patterns. The DFB analyzes input image into directional subband images and synthesizes them to the perfectly reconstructed image. In this paper, a new fingerprint processing algorithm using the DFB is proposed. The algorithm decomposes the fingerprint image into directional subband images and performs directional map generation, foreground segmentation, singular points extraction and image enhancement based on local directional energy estimate.

키워드

참고문헌

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