基于Freeman分解的极化SAR数据相干斑滤波Speckle filtering of PolSAR data based on Freeman decomposition
雷小群
摘要(Abstract):
本文在Freeman分解理论基础上,提出一种极化SAR数据相干斑滤波算法。该算法基于Freeman散射模型对原始极化SAR数据进行分解,以获得像素的散射类型和总功率值;在滤波窗口内选取与中心像素散射类型相同,总功率值接近的像素构成滤波同质区;并根据同质区的局部统计特性,应用线性最小均方滤波器进行滤波处理。试验表明,该算法在有效去除相干斑的同时,对极化和边缘等细节信息也有较好的保持效果。
关键词(KeyWords): Freeman分解;极化SAR;相干斑滤波
基金项目(Foundation):
作者(Author): 雷小群
DOI: 10.16251/j.cnki.1009-2307.2013.02.024
参考文献(References):
- [1]Lee J S,Boerner W M,Schuler D L,et al.A review ofpolarimetric SAR algorithms and their applications[J].Journal of Photogrammetry and Remote Sensing,2004,9(3):31-80.
- [2]周晓光,匡纲要,万建伟.多极化SAR图像斑点抑制综述[J].中国图象图形学报,2008,13(3):377-385.
- [3]Lee J S,Grunes M R,Grandi G De.Polarimetric SARspeckle filtering and its implication for classification[C]//IEEE Trans.on Geosci.Remote Sensing,1999,37(5).
- [4]Lee J S,Grunes M R,Schuler D L,et al.Scattering-model-based speckle filtering of polarimetric SAR data[C]//IEEE Transactions on Geoscience and RemoteSensing,2006,44(1):176-187.
- [5]Freeman A,Durden S L.A three-component scatteringmodel for polarimetric SAR data[C]//IEEE Trans.Geos-ci.Remote Sens,1998,36(3):963-973.
- [6]Lee J S.Digital Image Enhancement and Noise Filteringby use of Local Statistics[C]//IEEE Transactions on Pat-tern Analysis and Machine Intelligence,1980,2(2):165-168.
- [7]吴婉澜,皮亦鸣.结合Freeman分解与子孔径散射特性的极化SAR图像分类[J].测绘科学,2010,35(5).
- [8]王超,张红,陈曦,等.全极化合成孔径雷达图像处理[M].北京:科学出版社,2008.