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(Unpublished)
|
(Document in English)
PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader 1MB |
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) |
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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 - Toulouse INP (FRANCE) French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE) Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE) Université de Toulouse > Université Toulouse - Jean Jaurès - UT2J (FRANCE) Université de Toulouse > Université Toulouse 1 Capitole - UT1 (FRANCE) |
Laboratory name: | |
Statistics: | download |
Deposited On: | 06 Jun 2018 16:41 |
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