发明名称 |
Method for encoding a video signal using feature point based motion estimation |
摘要 |
A method for adaptively selecting feature points according to motions of objects between the current frame and the previous frame, comprising the steps of: subtracting a pixel value of the previous frame from a pixel value of the current frame to thereby provide a differential pixel value; comparing the differential pixel value with a first threshold value TH1 and selecting processing regions having differential pixel values larger than the first threshold value TH1; detecting a motion vector for each pixel of the processing region in the previous frame; providing a pixel value of the current frame based on the motion vector for each pixel of the processing region in the previous frame; subtracting a pixel value of said each pixel of the processing region in the previous frame from the pixel value of the current frame to thereby provide an error pixel value; comparing the error pixel value with a second threshold value TH2 and selecting grid regions having error pixel values larger than the second threshold value TH2; generating a first grid for each of the processing regions in the previous frame and generating a second grid for said each of the grid regions; detecting edge points from the previous frame; and selecting, as the feature points, a multiplicity of pixels in the previous frame based on the first and the second grids and the edge points.
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申请公布号 |
US5546129(A) |
申请公布日期 |
1996.08.13 |
申请号 |
US19950498554 |
申请日期 |
1995.07.05 |
申请人 |
DAEWOO ELECTRONICS CO., LTD. |
发明人 |
LEE, MIN-SUP |
分类号 |
H04N7/32;H04N7/26;(IPC1-7):H04N7/133;H04N7/137 |
主分类号 |
H04N7/32 |
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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