Despeckling SAR images using stationary wavelet transform combining with directional filter banks

  • Germain M
  • Bénié G
  • Boucher J
 et al. 
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Abstract

Radar images can showgreat variability from pixel to pixel, which is an obstacle to effective processing. This variability, due to speckle created by the radar wave coherence, necessitates the use of more adapted filters. Previous studies have shown that multiresolution wavelet analysis yields better results but produces artefacts due to multiscale decomposition. This paper proposes a method that reduces these effects by introducing the fractal di- mension. The resultant filter combines wavelet decomposition and variance change model based on the level of variance estimated by studying the fractal dimension of the image.

Author-supplied keywords

  • Adaptive filtering
  • fractal dimension
  • multires-
  • olution analysis
  • speckle effect
  • synthetic aperture radar (SAR)
  • wavelet transform

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Authors

  • Mickaël Germain

  • Goze B. Bénié

  • Jean-Marc Boucher

  • Samuel Foucher

  • Ko Fung

  • Kalifa Goïta

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