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

Korean Institute of Information Scientists and Engineers (한국정보과학회)
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A Constrained Self-Calibration Technique

제약 조건을 적용한 셀프 캘리브레이션 방법

  • 김성용 (포항공과대학교 컴퓨터공학과) ;
  • 한준희 (포항공과대학교 컴퓨터공학과)
  • Published : 2001.04.01
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Abstract

셀프 캘리브레이션은 영상 시퀀스에 대한 특징점 정합 결과를 이용하여 카메라 내부 파라미터를 계산하는 기법이다. 이는 임의로 움직이는 카메라를 이용하여 얻은 영상 시퀀스를 이용하여 유클리디안 복원을 수행하는데 응용될 수 있다. 안정적인 3차원 복원결과를 얻기 위하여 본 논문에서는 두 가지 제약 조건을 사용한다(카메라 내부 파라미터의 개수에 대한 제약 조건과 복원할 장면의 기하학적 구조를 이용한 제약 조건). 카메라 내부 파라미터에 대한 제약 조건은 카메라의 하드웨어적인 특성을 반영하며 이러한 제약 조건을 적용함으로써 셀프 캘리브레이션 중 비선형 최적화 과정의 수렴도를 높일 수 있다. 또, 기하학적 제약 조건은 대상 장면의 직각 구조를 이용하여 이에 대한 조건을 분석하여 제약 조건에 대한 수식을 유도한 다음 이를 최적화 과정에 포함시킨다. 합성 영상과 다양한 종류의 실제 영상에 대한 실험을 통하여 본 논문에서 제안된 방법을 이용하면 개선된 유클리디안 복원 결과를 얻을 수 있음을 보인다.

Keywords

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