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Volume 27 Issue 6
Jun.  2001
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Journal of Beijing University of Aeronautics and Astronautics  > 2001  >  27(6): 713-716.
MA Zuo-min, MAO Shi-yi, LIU Xiang-linet al. Influence of Nonstationarity on SAR Imagery Models and De-Speckling Filters[J]. Journal of Beijing University of Aeronautics and Astronautics, 2001, 27(6): 713-716. (in Chinese)
Citation: MA Zuo-min, MAO Shi-yi, LIU Xiang-linet al. Influence of Nonstationarity on SAR Imagery Models and De-Speckling Filters[J]. Journal of Beijing University of Aeronautics and Astronautics, 2001, 27(6): 713-716. (in Chinese)
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Influence of Nonstationarity on SAR Imagery Models and De-Speckling Filters

  • Beijing University of Aeronautics and Astronautics, Dept. of Electronic Engineering

  • Received Date: 24 Apr 2000
  • Publish Date: 30 Jun 2001
    Abstract
  • From the stochastic process point of view, Synthetic Aperture Radar (SAR) images are divided into four cases as stationary within resolution cell, nonstationary within resolution cell, stationary within local processing window and nonstationary within local processing window according to their stationarities. Then the influence of nonstationarity on multiplicative noise model of speckle, scene-speckle product model and structured neighborhood model are investigated, stationarity satisfactory conditions of these models are derived respectively. The performances of various kinds of de-speckling filters are re-assessed based on the above analyses, and filtering results of real imagery are given.

     

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  • [1] Jahangir M, Oliver C J. Estimating parameters for a statistical model describing weak scattering. DERA Radar 1997, 1997. 129~134. [2] Kuan D T, Sawchuk A A. Adaptive noise smoothing filter for images with signal-dependent noise[J]. IEEE Trans Pattern Anal Mach Intell,1985,7(2):165~177. [3] Lewinski D J. Nonstationary probalilistic target and clutter scattering models[J]. IEEE Trans Ant Propagation,1983,31(3):490~498. [4] Oliver C, Quegan S. Understanding synthetic aperture radar images[M]. London:Artech House, 1998. [5] Touzi R. A protocol for speckle filtering of SAR images. http://www.estec.esa.nl/ceos99/papers/p119.pdf,1999. [6] McConnell I, White R, Oliver C, et al. The DRA despeckling algorithm. IEE Colloquium. 1995. 9/1~9/6.
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