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A Bayesian model for joint unmixing, clustering and classification of hyperspectral data

Lagrange, Adrien and Dobigeon, Nicolas and Fauvel, Mathieu and May, Stéphane A Bayesian model for joint unmixing, clustering and classification of hyperspectral data. (2017) In: Séminaire des doctorants, 28 April 2017 (Toulouse, France). (Unpublished)

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Official URL: https://informatique-mia.inra.fr/resste/sites/informatique-mia.inra.fr.resste/files/RESSTEmai2017_ALagrange.pdf#overlay-context=hierarchique

Abstract

Supervised classification and spectral unmixing are two methods to extract information from hyperspectral images. However, despite their complementarity, they have been scarcely considered jointly. This paper presents a new hierarchical Bayesian model to perform simultaneously both analysis in order to ensure that they benefit from each other. A linear mixture model is proposed to described the pixel measurements. Then a clustering is performed to identify groups of statistically similar abundance vectors. A Markov random field (MRF) is used as prior for the corresponding cluster labels. It pro-motes a spatial regularization through a Potts-Markov potential and also includes a local potential induced by the classification. Finally, the classification exploits a set of possibly corrupted labeled data provided by the end-user. Model parameters are estimated thanks to a Markov chain Monte Carlo (MCMC) algorithm. The interest of the proposed model is illustrated on synthetic and real data.

Item Type:Conference or Workshop Item (Other)
HAL Id:hal-02139416
ProdINRA Id:424217
Audience (conference):National conference without published proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National d'Études Spatiales - CNES (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Université de Toulouse > Université Toulouse - Jean Jaurès - UT2J (FRANCE)
Université de Toulouse > Université Toulouse 1 Capitole - UT1 (FRANCE)
Laboratory name:
Statistics:download
Deposited By: INRA INRA
Deposited On:06 Jun 2018 16:41

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