摘要
在研究和分析图像压缩中块匹配运动估计算法的基础上,提出了一种采用多向小十字模板进行快速块匹配运动估计算法MP-SDSP,算法根据序列图像中运动矢量场中心偏置分布特性,利用一条以上的路径寻找最优运动矢量,避免了在快速搜索中陷入错误路径。试验结果证明,在搜索精度基本相同的情况下,MP-SDSP算法能有效减少搜索点数,提高搜索速度,并适应小运动块和大运动块的搜索。
This paper presents a block motion estimation algorithm named Multi-Path Search(MPS) using small diamond search pattern.According to the characteristic of the center-based motion vector distribution for the real-world video sequence,MP-SDSP utilizes more than one path to find the absolute minima.Wrong search paths are avoided early resulting in faster search.Experimental results indicate that MP-SDSP algorithm can reduce the number of search points to improve the search speed with the similar search precision,and it does well in stationary and large motion search.
出处
《计算机工程与应用》
CSCD
北大核心
2011年第22期141-144,共4页
Computer Engineering and Applications
基金
国家"十一五"科技支撑重大项目(No.2006BAJ02A09)
关键词
图像压缩
块匹配算法
运动估计
多向搜索
image compression
block-matching algorithm
motion estimation
multi-path search