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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Fingerprint Image Enhancement Algorithm Based on Gabor Filter Using Multiresolution Image Information

다중해상도 영상정보를 이용한 가보필터 기반 지문영상 개선

  • Published : 2004.11.01
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Abstract

A new fingerprint image enhancement algorithm using multiresolution information and Gabor filter is proposed in this paper. The proposed algorithm performs selection of the region in image according to inclusion of singular points and then performs enhancement using Gabor filtering of the region adjusted in its size. Gabor filter using representative direction in the same block is used in the region that the direction of ridge is not changed much, while Gabor filter using pixel based direction is used in the region that the direction of ridge is changed much. This method can reduce processing time for enhancement using Gabor filter and preserve the merit of Gabor filter.

본 논문은 영상의 다중 해상도 정보를 이용하여 지문영상을 개선하는 새로운 방법을 제안한다. 지문영상에서 융선 진행의 변화가 심한 특이영역에서는 화소단위의 필터링을 수행하고, 완만한 변화를 보이는 영역에서는 블록 단위의 필터링을 선택적으로 수행함에 따라, 개선영상의 품질은 향상되며, 연산 량은 감소한다. 실험에 따르면 화소단위의 필터링에 의한 개선 방법에 비하여 연산 속도는 매우 빨라졌으며, 결과영상으로부터의 특징점 인식율의 비교에 따라 개선영상의 품질이 향상됨을 확인할 수 있었다.

Keywords

References

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