Thèse soutenue

Contributions en classification automatique : agrégation bayésienne de mélanges de lois et visualisation interactive
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Auteur / Autrice : Pierrick Bruneau
Direction : Marc GelgonFabien Picarougne
Type : Thèse de doctorat
Discipline(s) : Informatique
Date : Soutenance en 2010
Etablissement(s) : Nantes
Ecole(s) doctorale(s) : École doctorale Sciences et technologies de l'information et mathématiques (Nantes)
Partenaire(s) de recherche : autre partenaire : Université de Nantes. Faculté des sciences et des techniques

Mots clés

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Résumé

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The internet and recent architectures such as sensor networks are currently witnessing tremendous and continuously growing amounts of data, often distributed on large scales. Combined with user expectations with respect to tooling, this encourages developing adequate techniques for analyzing and indexing. Classication and clustering tasks are about characterizing classes within data collections. These are often used as building blocks for designing tools aimed at making data accessible to users. In this document, we describe our contributions to mixture models aggregation. These models are classically used for content categorization. Using variational Bayesian principles, we aimed at designing low computation and transmission costs algorithms. Doing so, we aimed at proposing a building block for distributed density model estimation. We also contributed to visual classication applied to data streams. To this purpose, we employed bio-mimetic principles, and results from graph theory. More specically, visual and dynamic abstractions of an underlying clustering process were proposed. We strived to provide users with ecient interfaces, while allowing using their actions as a feedback.