Journal of KIISE:Software and Applications (한국정보과학회논문지:소프트웨어및응용)

Korean Institute of Information Scientists and Engineers (한국정보과학회)
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Face Recognition using Fisherface Method with Fuzzy Membership Degree

퍼지 소속도를 갖는 Fisherface 방법을 이용한 얼굴인식

  • Published : 2004.06.01
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Abstract

In this study, we deal with face recognition using fuzzy-based Fisherface method. The well-known Fisherface method is more insensitive to large variation in light direction, face pose, and facial expression than Principal Component Analysis method. Usually, the various methods of face recognition including Fisherface method give equal importance in determining the face to be recognized, regardless of typicalness. The main point here is that the proposed method assigns a feature vector transformed by PCA to fuzzy membership rather than assigning the vector to particular class. In this method, fuzzy membership degrees are obtained from FKNN(Fuzzy K-Nearest Neighbor) initialization. Experimental results show better recognition performance than other methods for ORL and Yale face databases.

본 논문에서는 퍼지논리에 기초한 Fisherface 얼굴인식 방법의 확장을 다룬다. Fisherface 얼굴인식 방법은 주성분 분석 기법만을 이용하는 경우에 비해 조명의 방향, 얼굴의 포즈, 감정과 같은 변동에 대해 민감하지 않은 장점을 가지고 있다. 그러나, Fisherface 방법을 포함한 얼굴인식의 다양한 방법들은 입력 벡터가 한 클래스에 할당되어질 때 그 클래스에서 소속의 정도를 0 또는 1로서 나타낸다. 따라서 이러한 방법들은 얼굴영상들이 조명이나 보는 각도로 인해 변형이 생기는 경우에 인식률이 저하되는 문제가 있다. 본 논문에서는 PCA에 의해 변환된 특징벡터에 퍼지 소속도를 할당하는 것으로, 퍼지 소속도는 퍼지 kNN(k-Nearest Neighbor)으로부터 얻어진다. 실험 결과 ORL, Yale 얼굴 데이타베이스에서 기존의 인식방법 보다 향상된 인식 성능을 보임을 알 수 있었다.

Keywords

References

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