收稿日期: 2011-12-29
修回日期: 2012-03-13
网络出版日期: 2013-01-15
基金资助
国家重大科技基础设施建设项目(CARSS/HK-C)资助
A new spatial speckle reduction method for polarimetric SAR data
Received date: 2011-12-29
Revised date: 2012-03-13
Online published: 2013-01-15
张静怡 , 雷斌 , 刘团结 . 一种新型的空域极化SAR数据相干斑滤波方法[J]. 中国科学院大学学报, 2013 , 30(1) : 60 -67 . DOI: 10.7523/j.issn.1002-1175.2013.01.010
In order to effectively reduce the speckle of PolSAR data,a new algorithm is proposed combing the improved sigma filter with unsupervised Wishart classification based on Freeman-Durden decomposition. Pixels within the sigma range and also in the same scattering category are selected and used to estimate the central pixel. The experiment results show that the proposed algorithm excels in both the suppression of the speckle and the preservation of the edges and texture details and that it can protect the scattering characteristics of targets.
[1] Lopes A, Sery F. Optimal speckle reduction for the product model in multi-look polarimetric SAR imagery and the wishart distribution[J]. IEEE Transactions on Geoscience and Remote Sensing, 1997, 35(3): 632-647.
[2] Lee J S, Grunes M R, Mango S A. Speckle reduction in multi-polarization multi-frequency SAR imagery[J]. IEEE Transactions on Geoscience and Remote Sensing, 1991, 29(4):535-544.
[3] Goze S, Lopes A. A MMSE speckle filter for full resolution SAR polarimetric data[J].Journal of Electromagnetic Waves and Applications, 1993, 7(5): 717-737.
[4] Lee J S, Grunes M R, Grandi G. Polarimetric SAR speckle filtering and its implication for classification[J]. IEEE Transactions on Geoscience and Remote Sensing, 1999, 37(5):2363-2373.
[5] Lee J S. Digital image smoothing and the sigma filter[J]. Comput Graphics Image Processing, 1983,24(2):255-269.
[6] Lee J S. Improved sigma filter for speckle filtering of SAR imagery[J]. IEEE Transactions On Geoscience and Remote Sensing,2009,47(1): 202-213.
[7] Freeman A, Durden S L. A three-component scattering model for polarimetric SAR data[J]. IEEE Transactions on Geoscience and Remote Sensing, 1998, 36(3): 963-973.
[8] Lee J S, Grunes M R, Ainsworth T L, et al. Unsupervised classification using polarimetric decomposition and the complex wishart classifier[J].IEEE Transactions on Geoscience and Remote Sensing, 1999, 37(5): 2249-2258
[9] Vasile G, Trouve E, Lee J S, et al. Intensity-driven-adaptive-neighborhood technique for polarimetric and interferometric parameter estimation[J]. IEEE Transactions on Geoscience and Remote Sensing, 2006, 44(4): 994-1003.
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