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Modified Independent Component Analysis for Initializing Non-negative Matrix Factorization : An approach to Hyperspectral Image Unmixing

Benachir, Djaouad and Hosseini, Shahram and Deville, Yannick and Karoui, Moussa and Hameurlain, Abdelkader Modified Independent Component Analysis for Initializing Non-negative Matrix Factorization : An approach to Hyperspectral Image Unmixing. (2013) In: International Workshop on Electronics, Control, Modelling, Measurement and Signals (ECMS 2013), 24 June 2013 - 26 June 2013 (Toulouse, France).

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Official URL: http://dx.doi.org/10.1109/ECMSM.2013.6648948

Abstract

Hyperspectral unmixing consists of identifying, from mixed pixel spectra, a set of pure constituent spectra (endmembers) in a scene and a set of abundance fractions for each pixel. Most linear blind source separation (BSS) techniques are based on Independent Component Analysis (ICA) or Non-Negative Matrix Factorization (NMF). Using only one of these techniques does not resolve the unmixing problem because of, respectively, the statistical dependence between the abundance fractions of the different constituents and the non-uniqueness of the NMF results. To overcome this issue, we propose an unsupervised unmixing approach called ModifICA-NMF (which stands for modified version of ICA followed by NMF). Consider the ideal case of a hyperspectral image combining (M-1) statistically independent source images, and an Mth image depending on them due to the sum-to-one constraint. Our modified ICA first estimates these (M-1) sources and associated mixing coefficients, then derives the remaining source and coefficients, while it also removes the BSS scale indeterminacy. In real conditions, the above (M-1) sources may be somewhat dependent. Our modified ICA method then only yields approximate data. These are then used as the initial values of an NMF method, which refines them. Our tests show that this joint modifICA-NMF approach significantly outperforms the considered classical methods.

Item Type:Conference or Workshop Item (Paper)
Additional Information:http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6648948&filter%3DAND%28p_IS_Number%3A6648925%29
HAL Id:hal-01178559
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:Other partners > Agence Spatiale Algérienne - ASAL (ALGERIA)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (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)
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Deposited By: IRIT IRIT
Deposited On:02 Jul 2015 09:58

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