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강현철,Kang, Hyunchul 한국정보통신학회 2019 한국정보통신학회논문지 Vol.23 No.6
부분 기반 영상 표현(part-based image representation)에서는 영상의 부분적인 모습을 기저 벡터로 표현하고 기저 벡터의 선형 조합으로 영상을 분해하며, 이 때 기저 벡터의 계수가 곧 물체의 부분적인 특징을 의미하게 된다. 본 논문에는 부분 기반 영상 표현 기법인 비음수 행렬 분해(non-negative matrix factorization, NMF)를 이용하여 얼굴 영상을 표현하고 신경망 기법을 적용하여 가려진 얼굴을 인식하는 얼굴 인식을 제안한다. 표준 비음수 행렬 분해, 투영 경사 비음수 행렬 분해, 직교 비음수 행렬 분해를 이용하여 얼굴 영상을 표현하였고, 각 기법의 성능을 비교하였다. 인식기로는 학습벡터양자화 신경망을 사용하였으며, 인식기에서의 거리 척도로는 유클리디언 거리를 사용하였다. 실험 결과, 전통적인 얼굴 인식 방법에 비하여 제안한 기법이 가려진 얼굴 인식에 보다 강인함을 보인다. In part-based image representation, the partial shapes of an object are represented as basis vectors, and an image is decomposed as a linear combination of basis vectors where the coefficients of those basis vectors represent the partial (or local) feature of an object. In this paper, a face recognition for occluded faces is proposed in which face images are represented using non-negative matrix factorization(NMF), one of part-based representation techniques, and recognized using an artificial neural network technique. Standard NMF, projected gradient NMF and orthogonal NMF were used in part-based representation of face images, and their performances were compared. Learning vector quantizer were used in the recognizer where Euclidean distance was used as the distance measure. Experimental results show that proposed recognition is more robust than the conventional face recognition for the occluded faces.
강현철 ( Kang Hyun-cheol ) 한국외국어대학교 법학연구소 2007 외법논집 Vol.26 No.-
The regime Semi-President compose a compromise between regime President and Parliament. But this regime become the third regime. Therefore, in the theory of constitution, We make researches into the regime Semi-President about a constitutional actuality. Also, now We dispute about the revision of the constitution in Korea for Presidential tenure. We must build up the regime justified for the theory of constitution unmistakable. This thesis make an observation of country into the regime Semi-President; Finland, Weimar, France and Romania. Finland and Weimar study on the regime Semi-President about success and failure a point of view in a constitutional actuality. And This thesis make an observation of Parliament, President and Cabinet with the Prime Minister which has power of a different kind. In general, President of Finland has the most of power among country into the regime Semi-President. The other side, President of Weimar has the most of power in a norm but a constitutional actuality has the least of power. In success and failure of regime is not a norm but a constitutional actuality. The regime Semi-President of France become compromise between regime President and Parliament in tipic.