%0 Journal Article
%T High accuracy sub-pixel global motion estimation based on upsampled gradient cross-correlation algorithm<br>高精度亚像素全局运动估计的上采样梯度互相关算法
%A Yu Yinghuai
%A Wang Jinrong
%A <br>余应淮
%A 王锦荣
%J 中国图象图形学报
%D 2012
%I 
%X Motion estimation is significant in the applications of video image compression, super-resolution reconstruction, mosaic, and target detection, and so on. In this letter, we present an improved algorithm for the problem of highly accurate sub-pixel global motion estimation, which introduces an optimal filter for computing image gradient, and also adopts the method of combining upsampling with paraboloid fitting gradient cross-correlation. Experimental results show that the proposed algorithm can not only achieve good robustness to the influence of noise, but can also improve the accuracy of motion estimation significantly.
%K sub-pixel
%K global motion estimation
%K optimal filter
%K gradient cross-correlation
%K upsampling
%K matrix multiplication
%K paraboloid fitting<br>亚像素
%K 全局运动估计
%K 优化滤波器
%K 梯度互相关
%K 上采样
%K 矩阵相乘
%K 抛物面拟合
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=D06194629680C940ACE75262F54B9D85&aid=DC0994A58AFB6AE972E4BB6A5D94E993&yid=99E9153A83D4CB11&vid=BCA2697F357F2001&iid=59906B3B2830C2C5&sid=E43F9466FF16A152&eid=D56713C22DA9FDE8&journal_id=1006-8961&journal_name=中国图象图形学报&referenced_num=0&reference_num=11