Extension of higher-order HMC modeling with application to image segmentation

Authors:
Lamia Benyoussef;Cyril Carincotte;Stéphane Derrode
Affiliations:
GSM Group, Institut Fresnel (CNRS UMR-6133), École Centrale de Marseille, Technopôle de Château-Gombert, 38, rue Frédéric Joliot Curie, 13451 Marseille Cedex 20, France;Multitel Asbl, Rue Pierre et Marie Curie, 7000 Mons, Belgium;GSM Group, Institut Fresnel (CNRS UMR-6133), École Centrale de Marseille, Technopôle de Château-Gombert, 38, rue Frédéric Joliot Curie, 13451 Marseille Cedex 20, France
Venue:
Digital Signal Processing
Year:
2008

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Abstract

In this work, we propose to improve the neighboring relationship ability of the hidden Markov chain (HMC) model, by extending the memory lengths of both the Markov chain process and the data-driven densities arising in the model. The new model is able to learn more complex noise structures, with respect to the configuration of several previous states and observations. Model parameters estimation is performed from an extension of the general iterative conditional estimation (ICE) method to take into account memories, which makes the classification algorithm unsupervised. The higher-order HMC model is then evaluated in the image segmentation context. A comparative study conducted on a simulated image is carried out according to the order of the chain. Experimental results on a synthetic aperture radar (SAR) image show that higher-order model can provide more homogeneous segmentations than the classical model, but to the cost of higher memory and computing time requirements.