이미지(파란색평면)
내 점(XL, XR)과 3차원 점(X)간의 관계를 표현하는 그림Essential matrix
/ Fundamental Matrix
left view의 p
와 행렬곱(matrix multiplication)으로 right view의 p'좌표
로 변환시키는 matrix한쪽 normalized image plane내의 한 점
에 대응하는, 다른 view에서의 epipolar line
을 찾을 수 있는 행렬essential (or epipolar) constraint
라고 부른다.(p')TEp = 0
으로 표현하기도 하던데, 둘 다 만족하는건지 확인 필요[Tx]R
행렬이라는 것을 증명하기 두 이미지 plane의 실제 pixel 좌표 사이의 기하학적 관계를 나타낸 행렬
(항상 이런행렬이 존재한다.)Fundamental Matrix
!intrinsic
을 알고 있다면, Fundamental Matrix
로부터 Essential Matrix
를 얻을 수 있고,Essential Matrix
= [Tx]R
이므로, intrinsic
을 모르는 경우epipolar constraint
을 이용해서, Fundamental Matrix
를 구할 수 있습니다.intrinsic
을 아는 경우회전변환 R이 3 자유도, 스케일을 무시한 평행이동 t가 2 자유도, 도합 5 자유도
이므로 5쌍의 매칭점을 필요로 함.
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