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Semi-supervised linear spectral unmixing using a hierarchical Bayesian model for hyperspectral imagery

Tourneret, Jean-Yves and Dobigeon, Nicolas and Chang, Chein-I Semi-supervised linear spectral unmixing using a hierarchical Bayesian model for hyperspectral imagery. (2008) IEEE Transactions on Signal Processing, vol. 5 (n° 7). pp. 2684-2695. ISSN 1053-587X

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Official URL: http://dx.doi.org/10.1109/TSP.2008.917851

Abstract

This paper proposes a hierarchical Bayesian model that can be used for semi-supervised hyperspectral image unmixing. The model assumes that the pixel reflectances result from linear combinations of pure component spectra contaminated by an additive Gaussian noise. The abundance parameters appearing in this model satisfy positivity and additivity constraints. These constraints are naturally expressed in a Bayesian context by using appropriate abundance prior distributions. The posterior distributions of the unknown model parameters are then derived. A Gibbs sampler allows one to draw samples distributed according to the posteriors of interest and to estimate the unknown abundances. An extension of the algorithm is finally studied for mixtures with unknown numbers of spectral components belonging to a know library. The performance of the different unmixing strategies is evaluated via simulations conducted on synthetic and real data.

Item Type:Article
Additional Information:Thanks to IEEE editor. The original PDF of the article can be found at IEEE website : http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=78 http://tinyurl.com/5rlq65
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Université de Toulouse I-Sciences Sociales - UT1
Other partners > National Chung Hsing University (TAIWAN)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > University of Maryland (USA)
French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Université de Toulouse II-Le Mirail - UTM
Laboratory name:
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Deposited By: Jean-yves TOURNERET
Deposited On:29 Jul 2008 08:43

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