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A modified scattering model-based speckle filter (SMBSF) based on the spatial proximity principle was applied to the analysis of phased array type L-band synthetic aperture radar (PALSAR) polarimetric data in the coastal environment of North Carolina, USA. The modified filter preserved polarimetric characteristics and further reduced speckle noise qualitatively and quantitatively. Classification accuracy using the SAR data filtered by the modified filter was improved, especially for the forest class. [ABSTRACT FROM AUTHOR]

In non-Rayleigh distributed radar images, the number of scatters can be viewed as a Poisson random variable with the mean itself random. It is well known that the image follows the K distribution when the mean is gamma distributed. The recent paper by Delignon and Pieczynski derived three more intensity distributions by taking the mean to follow: the inverse gamma distribution, the beta distribution of the first kind, and the beta distribution of the second kind. In this Technical note, we derive a comprehensive collection of 16 possible forms for the intensity distribution. The corresponding estimation procedures are also derived by the method of moments. We feel that this work will serve as an important reference for statistical modelling of SAR images. [ABSTRACT FROM AUTHOR]