计算机科学 ›› 2014, Vol. 41 ›› Issue (11): 282-285.doi: 10.11896/j.issn.1002-137X.2014.11.055
张爽,王爽,焦李成
ZHANG Shuang,WANG Shuang and JIAO Li-cheng
摘要： 无监督的Wishart分类算法在多次迭代后,容易出现错分现象,即多个类别属于同一类散射机制,或者多种散射都拥有相同的类别标签。针对此问题,提出了一种新的基于Wishart MRF的无监督全极化SAR图像分类方法。新方法改进了散射机制保持的方式,即并不是完全限制像素点的散射机制,而是根据像素点的散射机制在迭代过程中给定一个有限的范围。同时,使用一种自适应区域的MRF方法来提取像素点的先验信息。该方法不仅考虑了全极化SAR数据的散射性质,而且结合了统计特性和邻域信息,并在一定程度上保持了散射性质。实验结果证明,与传统的Wishart和基于散射机制保持的Wishart算法相比,该方法在JPL/NASA的AIRSAR数据上取得了更好的分类结果。
| [1] Shi Lei,Zhang Le-fei,Yang Jian,et al.Supervised graph embedding for polarimetric SAR image classification [J].IEEE Geoscience and Remote Sensing Letters,2013,10(2):216-220 [2] Kersten P R,Lee J S,Ainsworth T L.Unsupervised classifica-tion of polarimetric synthetic aperture radar images using fuzzy clustering and EM clustering [J].IEEE Transactions on Geoscience and Remote Sensing,2005,43(3):519-527 [3] Lee J S,Grunes M R,Kwok R.Classification of multi-look polarimetric SAR imagery based on complex Wishart distribution [J].International Journey of Remote Sensing,1994,15(11):2299-2311 [4] Zhang Shuang,Wang Shuang,Chen Bo,et al.Classificationmethod for fully PolSAR data based on three novel parameters [J].IEEE Geoscience and Remote Sensing Letters,2014,11(1):39-43 [5] Cloude S R.An Entropy based classification scheme for polarimetric SAR data [C]∥Proc of IEEE Int Geosci Remote Sens Symposium.Florence:IEEE,1995:2000-2002 [6] Freeman A,Durden S L.A Three-component scattering modelfor polarimetric SAR data [J].IEEE Transactions on Geoscience and Remote Sensing,1998,36(3):963-973 (下转第296页)(上接第285页) [7] Krogager E.A new decomposition of the radar target scattering matrix [J].Electronic Letter,1990,26(18):1525-1526 [8] Cloude S R,Pottier E.A Review of target decomposition theorems in radar polarimetry [J].IEEE Transactions on Geoscience and Remote Sensing,1996,34(2):498-518 [9] Lee J S,Grunes M R,Pottier E,et al.Unsupervised terrain classification preserving polarimetric scattering characteristics [J].IEEE Transactions on Geoscience and Remote Sensing,2004,42(4):722-731 [10] Lee J S,Grunes M R,Ainsworth T L,et al.Unsupervised classification using polarimetric decomposition and complex Wishart classifier [J].IEEE Transactions on Geoscience and Remote Sensing,1999,37(5):2249-2348 [11] Li S Z.Markov random fielding modeling in image analysis(3rd Edition)[M].Springer-Verlag London,2009 [12] Wu Yong-hui,Ji Kang-feng,Yu Wen-xian,et al.Region-basedclassification of polarimetric SAR images using Wishart MRF [J].IEEE Geoscience and Remote Sensing Letters,2008,5(4):668-672 [13] Lee J S.Improved sigma filter for speckle filtering of SAR ima-gery [J].IEEE Transactions on Geoscience and Remote Sen-sing,2009,47(1):202-213 |
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