| 序列图象编码系统中基于小波变换的运动估计与运动补偿方法 |
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| 引用本文： | 李涛,俞斯乐. 序列图象编码系统中基于小波变换的运动估计与运动补偿方法[J]. 中国图象图形学报, 1998, 3(3): 184-188 |
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| 作者姓名： | 李涛 俞斯乐 |
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| 作者单位： | 中国航天工业总公司８３５７研究所(李涛)，天津大学电视与图象信息研究所(俞斯乐) |
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| 摘 要： | 提出了一种基于小波变换的块大小可变的多分辨率运动估计方法（ＶＢＭＲＭＥ），以减少图象间的时间冗余。首先估计最高层子图象的运动矢量，低层子图象的运动矢量由高层子图象的运动矢量经细化导出，子图象内每一块的大小随小波分解层数而变化，这能大幅度地减少搜索和匹配时间。
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| 关 键 词： | 小波变换，运动估计 |
A New Method of Motion Estimation and Motion Compensation Based on Wavelet Transform in Image Sequence Coding |
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| Li Tao and Yu Sile. A New Method of Motion Estimation and Motion Compensation Based on Wavelet Transform in Image Sequence Coding[J]. Journal of Image and Graphics, 1998, 3(3): 184-188 |
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| Authors: | Li Tao and Yu Sile |
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| Abstract: | A scheme of variable block size Multiresolution Motion Estimation(VBMRME) is presented in this paper,which reduces temporal redundancy between pictures of the image sequence. Motion vectors in the highest level of the wavelet pyramid are first estimated.Then they are refined for the prediction of motion vectors in the lower levels.The size of a block in each sub image is adapted to its level in the wavelet pyramid,so that the searching and matching time can be considerably reduced. |
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| Keywords: | Wavelet transform Motion estimation |
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