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METHOD AND APPARATUS FOR TRACKING THE MOTION OF IMAGE CONTENT IN A VIDEO FRAMES SEQUENCE USING SUB-PIXEL RESOLUTION MOTION ESTIMATION
METHOD AND APPARATUS FOR TRACKING THE MOTION OF IMAGE CONTENT IN A VIDEO FRAMES SEQUENCE USING SUB-PIXEL RESOLUTION MOTION ESTIMATION
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机译：利用亚像素分辨率运动估计跟踪视频帧序列中图像内容运动的方法和装置
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摘要
The motion of image content such as a point of interest in a video frames sequence is tracked using sub-pixel resolution motion estimation in forward and/or backward direction. The motion of image content or a point of interest between a reference frame and a following frame is estimated, starting from an integer pixel position in the reference frame. If the motion vector (v2 t ) has a position between integer pixel positions, the coordinates of that motion vector are replaced by an adjacent integer pixel position (v2 r ) in the following or previous frame, and the error value (off2) between these coordinates and the replacement coordinates is stored. Thereafter the following or previous frame is defined as the current frame, the motion (v3 c ) of the object is estimated between the replacement coordinates in the current frame and a following frame, and the stored error value is added in opposite direction (off3) to the corresponding motion vector, so as to get a corresponding precise motion vector (v3 t ). If the precise motion vector (v3 t ) has a position between integer pixel positions in the following or previous frame, its coordinates are replaced by an adjacent integer pixel position in the following or previous frame, and the corresponding error value (off3) is stored, and so on.
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