본 논문에서는 스테레오스코픽 3D 동영상에서 왼쪽과 오른쪽 영상 사이의 프레임 동기가 맞지 않아 시청에 어려움을 주는 문제를 해결하기 위해 두 영상에서 물체의 움직임에 따른 시간적 프레임 차분 영상을 이용한 동기화 방법을 제안한다. 먼저, 스테레오 조정 (rectification) 과정을 통해 수직 시차를 보정한 왼쪽과 오른쪽 입력 동영상에서 시간적 프레임 차분 영상을 구하고, 두 차분 영상들에 대한 수평 방향 프로파일을 계산한다. 그 다음, 두 수평 프로파일의 절대 오차에 대한 평균 (mean of absolute difference(MAD))을 계산하여 그 값이 최소가 되는 프레임 조합을 찾아 스테레오스코픽 3D 동영상의 동기를 맞출 수 있도록 하였다. 실험결과, 두 영상의 프레임 동기가 맞는 프레임 조합에서 최소 MAD 값을 기록하여 제안 방법을 통해 스테레오스코픽 3D 동영상에서의 프레임 동기화가 가능하며, 제안 방법이 가우시안 잡음이나 H.264/AVC를 이용한 동영상 압축에 대해서도 강인함을 갖고 있음을 알 수 있다.
KSP Keywords
Absolute difference
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