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.朱娟娟|zhujoo@126.com