Team MISTIS

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Section: Software

The SpaCEM 3 program

Participants : Sophie Chopart, Senan Doyle, Florence Forbes.

The SpaCEM 3 (Spatial Clustering with EM and Markov Models) program replaces the former, still available, SEMMS (Spatial EM for Markovian Segmentation) program developed with Nathalie Peyrard from INRA Avignon.

SpaCEM 3 proposes a variety of algorithms for image segmentation, supervised and unsupervised classification of multidimensional and spatially located data. The main techniques use the EM algorithm for soft clustering and Markov Random Fields for spatial modelling. The learning and inference parts are based on recent developments based on mean field approximations. The main functionalities of the program include:

The former SEMMS functionalities, ie.

And additional possibilities such as,

The SEMMS package, written in C, is publicly available at: http://mistis.inrialpes.fr/software/SEMMS.html . The SpaCEM 3 written in C++ is available at http://spacem3.gforge.inria.fr . Sophie Chopart started working on the initial version of the software and included a user interface and other improvements. Also we started adding the possibility to deal with mixtures of Poisson distributions in particular in the context of our application to epidemiology.


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