Bayesian classification of multi look polarimetric SAR images with a generalized multiplicative speckle model

Guoqing Liu; ShunJi Huang; Andrea Torre; Franco S. Rubertone

doi:10.1117/12.281578

28 July 1997 Bayesian classification of multi look polarimetric SAR images with a generalized multiplicative speckle model

Guoqing Liu, ShunJi Huang, Andrea Torre, Franco S. Rubertone

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Proceedings Volume 3070, Algorithms for Synthetic Aperture Radar Imagery IV; (1997) https://doi.org/10.1117/12.281578
Event: AeroSense '97, 1997, Orlando, FL, United States

Abstract

In this paper, a maximum likelihood (ML) classification algorithm is proposed to classify multi-look polarimetric SAR images. This algorithm considers a generalized multiplicative speckle model in which three texture factors are assumed to separately affect three polarization channels. We derive the ML estimation of the texture parameters for each polarization channel with the complex Wishart distribution of the multi-look speckle covariance matrix, and design the corresponding ML classifier according to the Bayesian criterion.BOth the texture class statistics and the discriminant function are given in simple closed forms. Further, a method for adaptively producing the a priori probabilities is also presented in order to improve the classification accuracy. This method utilizes the contextual information in a forward procedure, and does not need any iteration. With the NASA/JPL L-band 4-look polarimetric SAR data, the effectiveness of the presented classification algorithm is demonstrated, and using of the adaptive a priori probabilities is shown to result in improved classifications.

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Guoqing Liu, ShunJi Huang, Andrea Torre, and Franco S. Rubertone "Bayesian classification of multi look polarimetric SAR images with a generalized multiplicative speckle model", Proc. SPIE 3070, Algorithms for Synthetic Aperture Radar Imagery IV, (28 July 1997); https://doi.org/10.1117/12.281578

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KEYWORDS

Polarimetry

Speckle

Synthetic aperture radar

Image classification

Polarization

Statistical analysis

Image segmentation

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