一种改进的用于合成孔径雷达图像相干斑抑制的双边滤波参数配置方法  

A modified method to configure the parameters of the bilateral filtering for synthetic aperture radar image speckle reduction

作　　者：李金才[1] 黄斌[2] 彭宇行[1] 

机构地区：[1]国防科学技术大学计算机学院,长沙410073 [2]怀化学院计算机系,怀化418008

出　　处：《物理学报》2012年第18期551-558,共8页Acta Physica Sinica

基　　金：国家重点基础研究发展计划(批准号:2011CB302601);国家高技术研究发展计划(批准号:2011AA01A202);国家自然科学基金(批准号:41175025,41105063,60803039,60970033)资助的课题~~

摘　　要：双边滤波能够有效光滑合成孔径雷达图像,同时保持边缘信息.最优配置双边滤波参数一直非常困难.本文作者曾提出了一种迭代参数配置方法,具有高精度、高效率的特点,但是该方法会出现迭代错误终止的情况.本文提出了一种改进的参数配置方法,能够确保获得最优折衷配置的参数,并且给出了该方法收敛性的证明.对真实合成孔径雷达图像的实验结果显示,在迭代精度相同的情况下,改进方法不仅能够获得与迭代方法相当的可视效果,而且灰度值近似方差参数具有更高的精度;随着迭代精度的提高,改进方法比迭代方法有更快的收敛速度.Bilateral filtering can effectively smooth synthetic aperture radar （SAR） images with preserving the edges, but it is difficult to configure the parameters of bilateral filtering to the optimum. The iterative method to configure the parameters with high precision and efficiency has been presented, but the iterative process may be aborted incorrectly. In this paper, we present a modified configuration method to get the optimal trade-off parameters, and give the proof of the convergence of the method. The experimental results on real SAR images show that the modified method can not only obtain equivalent visibility as the iterative method, but also higher accuracy of the gray value similarity variance than that under identical iterative precision. With the iterative precision improved, the convergence rate of the modified method is faster than that of the iterative method.

关 键 词：双边滤波 合成孔径雷达 相干斑抑制 参数配置 

分 类 号：TN957.52[电子电信—信号与信息处理]