OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

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, 5 (7). 2684-2695. ISSN 1053-587X

(Document in English)

PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader

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


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
HAL Id:hal-03579588
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Université Toulouse 1 Capitole - UT1 (FRANCE)
Other partners > National Chung Hsing University (TAIWAN)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > University of Maryland (USA)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Université Toulouse - Jean Jaurès - UT2J (FRANCE)
Laboratory name:
Deposited On:29 Jul 2008 08:43

Repository Staff Only: item control page