%0 Journal Article
%T Speckle Suppression Using the Empirical Mode Decomposition<br>利用经验模态分解方法抑制SAR斑点噪声
%A HAN Chun-ming
%A GUO Hua-dong
%A WANG Chang-lin
%A <br>韩春明
%A 郭华东
%A 王长林
%J 遥感学报
%D 2002
%I 
%X An effective algorithm for suppressing speckle in synthetic aperture radar(SAR)images utilizing the empirical mode decomposition(EMD)method is presented in this paper.The EMD was proposed by Norden E Huang et al .,with which any complicated data set can be decomposed into a finite and often small number of intrinsic mode functions.Contrary to almost all previous methods,this new method is intuitive,direct,a posterior and adaptive,with the basis of the decomposition based on,and derived from,the data.So EMD is quite suitable for analyzing nonlinear and non_stationary data.A line of digital SAR images can be decomposed into a series of modes whose characteristic space scale defined by the space lapse between the extrema is different.The speckle noise is defined by the mode whose space scale is not more than 4.The SAR speckle suppression is implemented by smearing short space scale component in the spatial domain via the EMD.As the EMD is one_dimensional method,we use EMD in the following way.First we process each horizontal row of pixels,then process each column pixel of image. EMD is based on and derived from the data,thus it is adaptive and can preserve the edge information.Application to SAR images has shown that the performance of the algorithm is satisfactory in both smoothing and edge preservation.
%K SAR
%K EMD
%K speckle
%K space scale<br>经验模态分解方法
%K 斑点噪声
%K SAR
%K EMD
%K 空间特征周期尺度
%K 遥感图像
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=A41A70F4AB56AB1B&jid=F926358B31AC94511E4382C083F7683C&aid=28BD02804F4AB307&yid=C3ACC247184A22C1&vid=B31275AF3241DB2D&iid=E158A972A605785F&sid=4FE459D71E3BF8EB&eid=273ADA1BCEFE8C00&journal_id=1007-4619&journal_name=遥感学报&referenced_num=9&reference_num=6