A Variational Model for PolSAR Data Speckle Reduction Based on the Wishart Distribution
Nie, Xiangli1; Qiao, Hong2; Zhang, Bo3; Bo Zhang
2015-04-01
发表期刊IEEE TRANSACTIONS ON IMAGE PROCESSING
卷号24期号:4页码:1209-1222
文章类型Article
摘要In this paper, we propose a variational model for polarimetric synthetic aperture radar (PolSAR) data speckle reduction, which is based on the complex Wishart distribution of the covariance or coherency matrix and multichannel total variation (TV) regularization defined for complex-valued matrices. By assuming the TV regularization to be a prior and taking the statistical distribution of the covariance matrix in each resolution element into account, the variational model for PolSAR covariance data speckle suppression, named WisTV-C, is derived from the maximum a posteriori estimate. A similar variational model for PolSAR coherency data speckle reduction, named WisTV-T, is also obtained. As far as we know, this is the first variational model for the whole PolSAR covariance or coherency matrix data despeckling. Since the model is nonconvex, a convex relaxation iterative algorithm is designed to solve the variational problem, based on the variable splitting and alternating minimization techniques. Experimental results on both simulated and real PolSAR data demonstrate that the proposed approach notably removes speckles in the extended uniform areas and, meanwhile, better preserves the spatial resolution, the details such as edges and point scatterers, and the polarimetric scattering characteristics, compared with other methods.
关键词Polarimetric Synthetic Aperture Radar (Polsar) Speckle Reduction Multi-channel Total Variation Complex Wishart Distribution Variational Model
WOS标题词Science & Technology ; Technology
关键词[WOS]VECTORIAL TOTAL VARIATION ; POLARIMETRIC SAR IMAGERY ; ALGORITHM ; NOISE ; CLASSIFICATION ; MINIMIZATION ; RESTORATION ; INTENSITY
收录类别SCI
语种英语
WOS研究方向Computer Science ; Engineering
WOS类目Computer Science, Artificial Intelligence ; Engineering, Electrical & Electronic
WOS记录号WOS:000349774900002
引用统计
文献类型期刊论文
条目标识符http://ir.ia.ac.cn/handle/173211/8061
专题复杂系统管理与控制国家重点实验室_机器人理论与应用
通讯作者Bo Zhang
作者单位1.Chinese Acad Sci, Acad Math & Syst Sci, Inst Appl Math, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Automat, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Acad Math & Syst Sci, Inst Appl Math, Lab Sci & Engn Comp, Beijing 100190, Peoples R China
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Nie, Xiangli,Qiao, Hong,Zhang, Bo,et al. A Variational Model for PolSAR Data Speckle Reduction Based on the Wishart Distribution[J]. IEEE TRANSACTIONS ON IMAGE PROCESSING,2015,24(4):1209-1222.
APA Nie, Xiangli,Qiao, Hong,Zhang, Bo,&Bo Zhang.(2015).A Variational Model for PolSAR Data Speckle Reduction Based on the Wishart Distribution.IEEE TRANSACTIONS ON IMAGE PROCESSING,24(4),1209-1222.
MLA Nie, Xiangli,et al."A Variational Model for PolSAR Data Speckle Reduction Based on the Wishart Distribution".IEEE TRANSACTIONS ON IMAGE PROCESSING 24.4(2015):1209-1222.
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