发明名称 |
METHOD AND APPARATUS FOR ENCODING VIDEO SIGNALS USING FEATURE POINT BASED MOTION PREDICTION |
摘要 |
A method for adaptively selecting feature points according to motions of objects between the current frame and the reference frame, comprising: detecting a motion vector for each pixel in the current frame between the current frame and the reference frame; providing a pixel value from the reference frame based on the motion vector for each pixel in the current frame; subtracting the pixel value provided from the reference frame from a pixel value of said each pixel of the current frame to thereby provide a differential pixel value; comparing the differential pixel value with a threshold value TH and selecting regions having their respective differential pixel values larger than the threshold value TH; shifting the pixels within the selected regions to positions indicated by their respective motion vectors to thereby provide shifted regions; detecting edge points from the reference frame; determining processing regions from the shifted regions, wherein the shifted regions are overlapped with a portion of the edge points; generating a first grid on the reference frame and a second grid for each of the processing regions, wherein the second grid is formed by a portion of grid points of the first grid and newly added grid points; and selecting, as the feature points, a multiplicity of pixels in the reference frame based on the first and the second grids and the edge points. |
申请公布号 |
KR0171154(B1) |
申请公布日期 |
1999.03.20 |
申请号 |
KR19950010585 |
申请日期 |
1995.04.29 |
申请人 |
DAEWOO ELECTRONICS CO.,LTD |
发明人 |
LEE, MIN-SUB |
分类号 |
H04N19/105;H04N7/24;H04N19/134;H04N19/136;H04N19/137;H04N19/139;H04N19/14;H04N19/167;H04N19/172;H04N19/182;H04N19/189;H04N19/196;H04N19/423;H04N19/50;H04N19/503;H04N19/51;H04N19/54;H04N19/543;H04N19/583;H04N19/61;H04N19/625;H04N19/91 |
主分类号 |
H04N19/105 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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