发明授权
US5673339A Method for encoding a video signal using feature point based motion
estimation
失效
使用基于特征点的运动估计对视频信号进行编码的方法
- 专利标题: Method for encoding a video signal using feature point based motion estimation
- 专利标题(中): 使用基于特征点的运动估计对视频信号进行编码的方法
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申请号: US509313申请日: 1995-07-31
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公开(公告)号: US5673339A公开(公告)日: 1997-09-30
- 发明人: Min-Sup Lee
- 申请人: Min-Sup Lee
- 申请人地址: KRX Seoul
- 专利权人: Daewoo Electronics Co., Ltd.
- 当前专利权人: Daewoo Electronics Co., Ltd.
- 当前专利权人地址: KRX Seoul
- 优先权: KRX95-5858 19950320
- 主分类号: H04N11/04
- IPC分类号: H04N11/04 ; G06T7/20 ; G06T9/00 ; H04N19/105 ; H04N19/136 ; H04N19/14 ; H04N19/182 ; H04N19/189 ; H04N19/196 ; H04N19/20 ; H04N19/423 ; H04N19/46 ; H04N19/463 ; H04N19/50 ; H04N19/503 ; H04N19/51 ; H04N19/517 ; H04N19/537 ; H04N19/54 ; H04N19/57 ; H04N19/61 ; H04N19/625 ; H04N19/70 ; H04N19/91 ; G06K9/36 ; H04N1/41
摘要:
A method for providing an accurately predicted current frame, comprising the steps of: selecting feature points in the previous frame and detecting a first set of motion vectors for the feature points; defining quadrangles by connecting the feature points; defining horizontally split triangles by splitting quadrangles and calculating a variance for each triangle and comparing the variance to select the smallest variance as first variance; defining vertically split triangles by splitting the quadrangles and calculating the variance for each triangle and comparing the variance to select the smallest variance value as second variance value; comparing the first and the second variance and selecting the smaller variance as a third variance and providing triangle information representing the split direction for the third variance; determining quasi-feature points on the current frame and a second set of motion vectors for the quasi-feature points; defining quadrangles formed by connecting the quasi-feature points, and splitting each quadrangle into two triangles; determining a predicted position on the previous frame for pixel contained in triangle of the current frame; determining a third set of motion vectors for the pixels contained in triangle of the current frame; and providing value of each pixel to be contained in the predicted current frame by using the second and the third set of motion vectors.
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