Construction de hiérarchies sémantiques pour l'annotation d'images

This paper proposes a new methodology to automatically build semantic hierarchies suitable for image annotation and classification. The building of the hierarchy is based on a new measure of semantic similarity. The proposed measure incorporates several sources of information : visual, conceptual and contextual as we defined in this paper. The aim is to provide a measure that best represents image semantics. We then propose rules based on this measure, for the building of the final hierarchy, and which explicitly encode hierarchical relationships between different concepts. Therefore, the built hierarchy is used in a semantic hierarchical classification framework for image annotation. Our experiments and results show that the built hierarchy improves significantly the classification accuracy. MOTS-CLÉS : construction de hiérarchies sémantiques, sémantique d’images, annotation d’images, mesures de similarité sémantiques, classification hiérarchique d’images.