计算机科学 ›› 2013, Vol. 40 ›› Issue (5): 266-270.
刘高峰,李明,王亚军,张鹏
LIU Gao-feng,LI Ming,WANG Ya-jun and ZHANG Peng
摘要: 极化SAR子空间分解滤波的优势在于能很好地保持极化信息,然而斑点噪声抑制效果与边缘、点目标信息的保持能力却有待提高。针对这一问题,提出了一种基于非负特征值分解(NNED)的极化SAR子空间分解滤波。对于每一个像素点,首先计算其参数向量协方差矩阵的特征值与特征向量,进而得到各个特征子空间;然后,以散射机制相似度最小化为标准,利用NNED选取分离信号子空间与噪声子空间的最优阈值;最后根据信号子空间得到滤波后的结果。实测极化SAR实验表明,相比于同类算法,所提出的算法能有效地抑制斑点噪声并且能很好地保持边缘、点目标信息。
[1] Van Zyl J J,Kim Y.Synthetic Aperture Radar Polarimetry[M].California:Jet Propulsion Laboratory,2011:85-155 [2] Lee J S,Pottier E.Polarimetric Radar Imaging from Basic to Application [M].New York:CRC Press,2011 [3] 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 [4] Cloude S R.Polarisation Applications in Remote Sensing [M].New York:Oxford University Press,2010 [5] 杨杰,郎丰铠,李德仁.一种利用Cloude_Pottier 分解和极化白化滤波的全极化SAR图像分类算法[J].武汉大学学报:信息科学版,2011,36(1):104-107 [6] Lee J S,Grunes M R,Schuler D L,et al.Scattering-model-based speckle filtering of polarimetric SAR data [J].IEEE Transaction on Geoscience and Remote Sensing,2006,44(1):176-187 [7] 郭睿,刘艳阳,臧博.一种保持散射特性的极化SAR图像滤波方法[J].西安电子科技大学学报:自然科学版,2011,38(1):90-95 [8] 邓少平,李平湘,张继贤.基于乘积模型的极化SAR滤波[J].武汉大学学报:信息科学版,2011,36(10):1168-1171 [9] López-Martínez C,Fabregas X.Model-based polarimetric SARspeckle filter [J].IEEE Transaction on Geoscience and Remote Sensing,2008,46(11):3894-3907 [10] Chen Jiong,Chen Yi-lun,An Wen-tao.Nonlocal filtering for polarimetric SAR data:a pretest approach [J].IEEE Transaction on Geoscience and Remote Sensing,2011,49(5):1744-1754 [11] Deledalle C A,Tupin F,Denis L.Polarimetric SAR estimation based on non-local means [C]∥IEEE International Geoscience and Remote Sensing Symposium.Cape Town:IEEE Press,2010:2515-2518 [12] 张中山,余洁,燕琴.基于核独立成分分析的极化SAR图像相干斑抑制[J].测绘学报,2011,40(3):289-295 [13] Gu J,Yang J,Zhang H.Speckle filtering in polarimetric SAR data based on the subspace decomposition [J].IEEE Transaction on Geoscience and Remote Sensing,2004,42(8):1635-1641 [14] Yang J,Deng Q,Yue H,et al.Polarimetric whitening filter for POLSAR image based on subspace decomposition [J].Journal of Systems Engineering and Electronics,2008,19(6):1121-1126 [15] Liu Gao-feng,Li Ming,Wu Yan,et al.A novel despeckling algorithm of polarimetric SAR image based on SNR and parameter-vector spectrum amendment [C]∥IEEE CIE International Conference on Radar.Chengdu:IEEE Press,2011:1459-1462 [16] Van Zyl J J,Arii M,Kim Y.Model-based decomposition of polarimetric SAR covariance matrices constrained for nonnegative eigenvalues [J].IEEE Transaction on Geoscience and Remote Sensing,2011:49(9):3452-3459 [17] 王庆香,李迪,张舞杰.基于多特征的SAR图像的无监督分割[J].计算机科学,2010,37(10):267-270 [18] 王光新,林有明,张送保.SAR图像数据稀疏性分析及在特征增强中的应用[J].计算机科学,2011,38(2):267-270 [19] 张光辉,牛朝阳,李冬梅.基于差异度的极化SAR相干斑抑制效果评估[J].信号处理,2012,28(1):92-98 |
No related articles found! |
|