| 基于选择预测的自适应运动估计算法 |
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| 引用本文： | 魏星,蒋建国,齐美彬. 基于选择预测的自适应运动估计算法[J]. 中国图象图形学报, 2005, 10(7): 873-877 |
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| 作者姓名： | 魏星 蒋建国 齐美彬 |
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| 作者单位： | 合肥工业大学计算机与信息学院 合肥230009(魏星，蒋建国)，合肥工业大学计算机与信息学院 合肥230009(齐美彬) |
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| 基金项目： | 安徽省“十五”科技攻关计划项目(010506E2) |
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| 摘 要： | 依据图像序列的运动矢量的时空相关性和中心偏移特性,首先对宏块进行类型划分,并利用相关块而非相邻块进行初始点预测的选择预测方法,提出了一种对起点进行选择预测的自适应运动估计算法,而在搜索过程中,则根据不同的图像内容对不同的块灵活地采用不同的搜索模式。实验证明,该算法在大大提高搜索速度的同时,还能保证图像性能,还兼顾了运动估计复杂度和精确度的要求。
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| 关 键 词： | 运动估计 运动矢量 时空相关性 起点预测 |
| 文章编号： | 1006-8961(2005)07-0873-05 |
| 修稿时间： | 2004-09-07 |
A New Adaptive Motion Estimation Algorithm Based on Selecting Predictive Initial Search Point |
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| WEI Xing,JIANG Jian-guo,QI Mei-bin,WEI Xing,JIANG Jian-guo,QI Mei-bin and WEI Xing,JIANG Jian-guo,QI Mei-bin. A New Adaptive Motion Estimation Algorithm Based on Selecting Predictive Initial Search Point[J]. Journal of Image and Graphics, 2005, 10(7): 873-877 |
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| Authors: | WEI Xing JIANG Jian-guo QI Mei-bin WEI Xing JIANG Jian-guo QI Mei-bin WEI Xing JIANG Jian-guo QI Mei-bin |
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| Abstract: | By studying the spatio-temporal correlation and the center-biased characeristic of motion vectors in image sequences,this paper classifies the macro-blocks as different types and takes advantage of the relative blocks instead of neighbour blocks to predict the initial point.A new adaptive motion estimation algorithm based on selecting predictive initial search point is presented,according to which different modes are agilely selected in accordance with image contents.It has been proved with the experiments that this algorithm greatly improves the searching speed and at the same time guarantees image performances with consideration to complexity and accuracy of motion estimation. |
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| Keywords: | motion estimation motion vector spatio-temporal correlation initial search point prediction |
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