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用于运动估计的基于梯度下降搜索扩展算法
引用本文:阴法明,赵晓铃.用于运动估计的基于梯度下降搜索扩展算法[J].计算机工程与应用,2010,46(33):139-141.
作者姓名:阴法明  赵晓铃
作者单位:1. 南京信息职业技术学院,南京,210013
2. 大庆石油管理局通信公司,黑龙江,大庆163453
摘    要:在快速搜索算法中,基于梯度下降搜索算法对搜索速度的改善非常明显,但搜索质量下降较大,尤其是对于帧间图像运动较大的序列。对该算法进行针对性扩展,提出基于梯度下降搜索扩展算法。与全搜索、新三步搜索、四步搜索、基于块的梯度下降搜索、钻石搜索算法相比较,实验结果表明该算法在搜索速度和质量上表现良好。

关 键 词:视频编码  运动估计  块匹配算法  梯度
收稿时间:2009-10-23
修稿时间:2009-12-23  

Extended block-based gradient descent.Search algorithm for motion estimation
YIN Fa-ming,ZHAO Xiao-ling.Extended block-based gradient descent.Search algorithm for motion estimation[J].Computer Engineering and Applications,2010,46(33):139-141.
Authors:YIN Fa-ming  ZHAO Xiao-ling
Affiliation:1 .Nanjing Information Occupation Technical College,Nanjing 210013, China 2.Communication Company of Daqing Petroleum Administration Bureau,Daqing,Heilongjiang 163453 ,China)
Abstract:Among the fast search algorithms, Block-Based Gradient Descent Search(BBGDS) algorithm improves the search speed obviously.However, the decline of search quality is comparatively large, especially for the sequences which have a large amount of movements.This paper extends this algorithm pertinently and proposes an extended BBGDS(EBBGDS) algorithm. The EBBGDS is compared with Full Search(FS) ,New Three-Step Search(NTSS) ,Four-Step Searcb(FSS) ,Block-based Gradient Descent Search(BBGDS),and Diamond Search(DS).Experimental results show that the proposed algorithm provides competitive performance in search speed and quality.
Keywords:video coding  motion estimation  block matching algorithm  gradient
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