现代雷达2012，Vol.34Issue(7)：28-32,5.
基于散射模型的极化SAR图像相干斑抑制算法
An Algorithm of PolSAR Image Speckle Suppressing Based on Scattering Model
摘要
Abstract
Scattering targets of complex terrain surfaces are often randomly oriented and cause random fluctuating echoes.Aimed at the characteristic,a new PolSAR despeckling method based on scattering model is proposed in this paper.First,the deorientation process is applied to PolSAR data.Then,freeman decomposition is used to divide image pixels into four dominant scattering categories under the situation of considering existence of the mixed scattering mechanism.Unsupervised classification is performed to the pixels using euclidean distance measure.Finally,speckle suppression is done based on the minimum mean square error.On the basis of deorientation concept and mixed scattering mechanism,the new algorithm improves the initial classification result of pixels.Experimental results with PolSAR data from NASA/JPL AIRSAR system demonstrate that the proposed method achieves better performance both on speckle suppression and terrain classification compared with Lee's method.关键词
极化合成孔径雷达/相干斑抑制/去取向/混合散射/散射模型Key words
polarimetric synthetic aperture radar/speckle suppression/deorientation/mixed scatter/scattering model分类
信息技术与安全科学引用本文复制引用
韩萍,晏珂,吴仁彪..基于散射模型的极化SAR图像相干斑抑制算法[J].现代雷达,2012,34(7):28-32,5.基金项目
国家自然科学基金委员会与中国民用航空局联合资助项目(60979002) （60979002）
深圳大学ATR国防科技重点实验室开放课题 （）
