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SAR图像相干斑噪声的各向异性扩散滤波算法
引用本文:朱磊,程冬.SAR图像相干斑噪声的各向异性扩散滤波算法[J].电子测量与仪器学报,2011,25(10):857-863.
作者姓名:朱磊  程冬
作者单位:西安电子科技大学雷达信号处理重点实验室,西安,710071
基金项目:陕西省教育厅自然科学基金(编号:11JK0983)资助项目
摘    要:传统各向异性扩散滤波算法以梯度作为边缘检测与扩散系数生成的主要依据,当其用于抑制SAR图像中的乘性相干斑噪声时,存在对噪声敏感,边缘检测非恒虚警,扩散不均衡等问题,为此提出了一种新的各向异性扩散滤波算法.该算法利用平行窗通过比率运算生成边缘强度映射(ESM),然后利用ESM代替梯度作为边缘检测与扩散系数生成的主要参数,...

关 键 词:合成孔径雷达图像  边缘强度映射  相干斑  各向异性扩散  边缘锐化

Algorithm for reducing speckle noise in SAR image by anisotropic diffusion
Zhu Lei,Cheng Dong.Algorithm for reducing speckle noise in SAR image by anisotropic diffusion[J].Journal of Electronic Measurement and Instrument,2011,25(10):857-863.
Authors:Zhu Lei  Cheng Dong
Affiliation:Zhu Lei Cheng Dong (National Lab of Radar Signal Processing, Xidian Univ., Xi'an 710071, China)
Abstract:In traditional anisotropic diffusion filter algorithms,gradient is used as the main parameter to determine the edges of SAR image and produce nonlinear diffusion coefficients.When these algorithms are selected to reduce multiplicative speckle noise in SAR image,there are several shortcomings,such as sensitivity to noise,inconstant false alarm rate in edge detection,and imbalance diffusion.So a new algorithm based on anisotropic diffusion is proposed.In the new algorithm,edge strength map(ESM) is firstly pro...
Keywords:synthetic aperture radar image  edge strength map  speckle  anisotropic diffusion  edge sharpening  
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