摘要
提出一种分层位平面匹配的快速全局运动估计算法.算法充分利用多分辨率思想,在每一层选用不同位平面进行匹配以找到运动矢量;利用层内块运动的空间相关性和层间矢量传递性,来自适应地选择搜索起始点;同时设定阈值,对运动矢量满足准确度的子块,直接结束搜索;将所得到的各子块的运动矢量作为集合,根据其统计规律,找到出现概率最大的样本作为正确的全局运动矢量.实验表明,该算法计算速度快,且与块匹配全搜索相比,其误差小于半个像素,能够达到快速准确进行全局运动估计的能力.
A fast global motion estimation method based on hierarchical bit-plane matching is proposed.It makes full use of multi-resolution pyramid matching with different bit-planes to find the translation vector.According to the high correlation of adjacent blocks＇ motion vectors and father-children of hierarchical blocks,the initial search point is adaptively chosen.The threshold is also selected to detect the motion accuracy to finish the search in advance.With all the local motions as a set,the motion with the largest number is detected as the global motion.Experimental results show that this algorithm excels the block matching in speed while the error is below 0.5 pixel.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2009年第11期2993-2998,共6页
Acta Photonica Sinica
基金
国家高技术研究发展计划(2006AA01Z127)资助
关键词
电子稳像
位平面
全局运动估计
多分辨率
Electronic image stabilization
Bit plane
Global motion estimation
Multi-resolution
