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The origins of large-scale spatial patterns in biology have been an important source of theoretical speculation since the pioneering work by Turing (1952) on the chemical basis of morphogenesis. Knowing how these patterns emerge and their functional role is important to our understanding of the evolution of biocomplexity and the role played by self(More)
For deaf persons to have ready access to information and communication technologies (ICTs), the latter must be usable in sign language (SL), i.e. include interlanguage interfaces. Such applications will be accepted by deaf users if they are reliable and respectful of SL specificities – use of space and iconicity as the structuring principles of the(More)
Several French national projects have been achieved last years, allowing linguist and computer scientists working on French Sign Language (FSL) to establish a permanent collaboration. During these projects, several video FSL corpora have been realised. One of the research orientations induced by these projects relates to multidisciplinary annotation. From(More)
This paper presents a method of image processing used in a mono-vision system in order to study semiotic gestures. We present a robust method to track the hands and face of a person performing ges-tural communication and the Signs' language communication. A model of skin is used to compute the observation density as a skin colour distribution in the image.(More)
An Active Appearance Model (AAM) is a variable shape and appearance model built from annotated training images. It has been largely used to synthesize or fit face images. Person-independent face AAM fitting is a challenging open issue. For standard AAMs, fitting a face image for an individual which is not in the training set is often limited in accuracy,(More)
Automatic extraction of facial feature deformations (either due to identity change or expression) is a challenging task and could be the base of a facial expression interpretation system. We use Active Appearance Models and the simultaneous inverse compositional algorithm to extract facial deformations as a starting point and propose a modified version(More)
its effects, and adjusts or corrects the whole sequence). The concept definition is driven by the user, who handles directly concepts and their instances —entities produced by the operators. Nous proposons une approche interactive pour la réalisation d'applications de traitement d'images. Dans cette approche, l'utilisateur associe les résultats(More)