Journal of the Institute of Electronics and Information Engineers (전자공학회논문지)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Long Distance Face Recognition System using the Automatic Face Image Creation by Distance

거리별 얼굴영상 자동 생성 방법을 이용한 원거리 얼굴인식 시스템

  • Moon, Hae Min (Dept. of Information and Communication Engineering, Chosun University) ;
  • Pan, Sung Bum (Dept. of Electronics Engineering, Chosun University)
  • Received : 2014.07.03
  • Accepted : 2014.10.29
  • Published : 2014.11.25
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Abstract

This paper suggests an LDA-based long distance face recognition algorithm for intelligent surveillance system. The existing face recognition algorithm using single distance face image as training images caused a problem that face recognition rate is decreased with increasing distance. The face recognition algorithm using face images by actual distance as training images showed good performance. However, this also causes user inconvenience as it requires the user to move one to five meters in person to acquire face images for initial user registration. In this paper, proposed method is used for training images by using single distance face image to automatically create face images by various distances. The test result showed that the proposed face recognition technique generated better performance by average 16.3% in short distance and 18.0% in long distance than the technique using the existing single distance face image as training. When it was compared with the technique that used face images by distance as training, the performance fell 4.3% on average at a close distance and remained the same at a long distance.

본 논문에서는 지능형 영상 감시시스템을 위한 LDA기반 원거리 얼굴인식 알고리즘을 제안한다. 기존 단일 거리 얼굴영상을 학습으로 사용한 얼굴인식 알고리즘은 원거리로 갈수록 얼굴인식률이 떨어지는 문제점이 있다. 실제 거리별 얼굴영상을 사용한 방법은 얼굴인식률은 향상되지만 사용자가 직접 움직이며 학습용 거리별 얼굴영상을 취득해야하는 문제점이 있다. 그러므로 본 논문에서는 단일 거리에서 취득한 얼굴영상을 이용해 거리별 얼굴영상을 자동으로 생성하여 학습으로 사용하는 방법을 제안한다. 제안하는 방법은 기존 얼굴인식 방법과 동일한 수준의 사용자 협조에서 거리별 사용자 등록영상을 생성할 수 있는 장점이 있다. 실험결과, 제안한 알고리즘은 기존 단일 거리 학습영상 기반 알고리즘에 비해 근거리에서 평균 16.3%, 원거리에서 평균 18.0% 향상된 얼굴인식 성능을 나타냈고, 실제 거리별 얼굴영상을 사용한 방법보다 근거리에서 평균 4.3%감소했지만, 원거리에서는 동일한 얼굴인식 성능을 나타냈다.

Keywords

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