한국멀티미디어학회논문지 (Journal of Korea Multimedia Society)

  • 제15권6호
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  • Pages.770-783
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  • 2012
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  • 1229-7771(pISSN)
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  • 2384-0102(eISSN)
한국멀티미디어학회 (Korea Multimedia Society)
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행렬 분해 제약을 사용한 다중 영상에서의 투영 복원

Projective Reconstruction from Multiple Images using Matrix Decomposition Constraints

  • 안호영 (인천대학교 컴퓨터공학과) ;
  • 박종승 (인천대학교 컴퓨터공학과)
  • 투고 : 2011.09.30
  • 심사 : 2012.04.30
  • 발행 : 2012.06.30
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⟨ 이전 논문 다음 논문 ⟩

초록

본 논문에서는 다중 영상에서 추출된 특징점을 사용해서 투영 공간에서의 카메라 행렬과 3차원 정점좌표를 계산하는 방법을 제안한다. 수치적인 안정성을 위해서 특징점을 정규화한 후 복원하며 얻어지는 카메라 행렬과 3차원 정점에 대해서 비정규화한다. 카메라 행렬과 3차원 정점의 초기값을 얻기 위해서 특이값 분해기법을 사용해서 투영 깊이가 적용된 측정 행렬을 분해한다. 행렬 분해 제약을 사용하여 카메라 행렬과 3차원 정점을 투영 복원한다. 투영 복원 과정에서는 비선형 반복적 최적화 방법이 사용된다. 실험 결과 제안방법은 대체로 적절한 정확성을 얻었고 오차의 편차가 크지 않았다.

In this paper, we propose a novel structure recovery algorithm in the projective space using image feature points. We use normalized image feature coordinates for the numerical stability. To acquire an initial value of the structure and motion, we decompose the scaled measurement matrix using the singular value decomposition. When recovering structure and motion in projective space, we introduce matrix decomposition constraints. In the reconstruction procedure, a nonlinear iterative optimization technique is used. Experimental results showed that the proposed method provides proper accuracy and the error deviation is small.

키워드

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