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›› 2013, Vol. 30 ›› Issue (1): 60-67.DOI: 10.7523/j.issn.1002-1175.2013.01.010

• Research Articles • Previous Articles     Next Articles

A new spatial speckle reduction method for polarimetric SAR data

ZHANG Jing-Yi1,2,3, LEI Bin1,2, LIU Tuan-Jie1,2   

  1. 1. Key Laboratory of Technology in Geo-spatial Information Procession and Application System, Chinese Academy of Sciences, Beijing 100190, China;
    2. Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
    3. Graduate University, Chinese Academy of Sciences, Beijing 100049, China
  • Received:2011-12-29 Revised:2012-03-13 Online:2013-01-15

Abstract:

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.

Key words: polarimetric synthetic aperture radar(PolSAR), speckle reduction, sigma filter, scattering characteristics, unsupervised classification

CLC Number: