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Hyperspectral image unmixing using a multiresolution sticky HDP

Mittelman, Roni and Dobigeon, Nicolas and Hero, Alfred O. Hyperspectral image unmixing using a multiresolution sticky HDP. (2012) IEEE Transactions on Signal Processing, 60 (4). 1656-1671. ISSN 1053-587X

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Official URL: http://dx.doi.org/10.1109/TSP.2011.2180718


This paper is concerned with joint Bayesian endmember extraction and linear unmixing of hyperspectral images using a spatial prior on the abundance vectors.We propose a generative model for hyperspectral images in which the abundances are sampled from a Dirichlet distribution (DD) mixture model, whose parameters depend on a latent label process. The label process is then used to enforces a spatial prior which encourages adjacent pixels to have the same label. A Gibbs sampling framework is used to generate samples from the posterior distributions of the abundances and the parameters of the DD mixture model. The spatial prior that is used is a tree-structured sticky hierarchical Dirichlet process (SHDP) and, when used to determine the posterior endmember and abundance distributions, results in a new unmixing algorithm called spatially constrained unmixing (SCU). The directed Markov model facilitates the use of scale-recursive estimation algorithms, and is therefore more computationally efficient as compared to standard Markov random field (MRF) models. Furthermore, the proposed SCU algorithm estimates the number of regions in the image in an unsupervised fashion. The effectiveness of the proposed SCU algorithm is illustrated using synthetic and real data.

Item Type:Article
Additional Information:Thanks to IEEE editor. The definitive version of the article is available at:http://dx.doi.org/10.1109/TSP.2011.2180718
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (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)
Other partners > Laboratoire de recherche en télécommunications spatiales et aéronautiques - TéSA (FRANCE)
Other partners > University of Michigan - U-M (USA)
Laboratory name:
Deposited On:13 Mar 2012 14:31

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