Dynamiques d'intégration des espaces naturels protégés en France : une approche comparative entre parcs nationaux et réserves naturelles

Extraction des objets en mouvement : une approche mixte contours-régions

In this paper, we propose a new method to extract moving objects from a video stream without any motion estimation. The objective is to obtain a fast and efficient extraction method, robust to noise and large motions. Our approach consists in a frame differencing strategy combined with a hierarchical segmentation approach. First, we propose to extract moving edges with a new difference scheme, ...

Découverte et analyse des communautés implicites par une approche sémantique en ligne : l'outil WebTribe

With the rise of Web 2.0 and collaborative technologies that are attached to, the Web has now become a broad platform of exchanges between users. The majority of websites is now dedicated to social interactions of their users, or offers tools to develop these interactions. Our work focuses on the understanding of these exchanges, as well as emerging community structures arising, through a seman...

Éclairer le choix des outils de simulation des changements des modes d'occupation et d'usages des sols. Une approche comparative

During the last decades, a diversity of models has been developed to simulate future land use and land cover changes (LUCC). In this paper, we compared four modeling tools: CLUE-S, DINAMICA EGO, CA_MARKOV and Land Change Modeler. We assessed the methods and tools available for each modeling tool within these models based on the six steps necessary for a generic framework of LUCC modeling: 1) es...

Pour une généralisation des systèmes C.A.O : approche et applications

Dialogue entre agents naturels et agents artificiels. Une application aux communautés virtuelles