First,the information of the foreground areas in current frame is obtained with global motion estimation and image registration between current frame and temporally adjacent frames.

• 首先,对待合成视频,通过全局运动估计与补偿,将相邻帧在空间上对齐到当前帧。通过计算帧差,得到当前帧中的运动前景区域信息。