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Contextualisation & Capture de Gestuelles Utilisateur : Contributions à l'Adaptativité des Applications Interactives Scénarisées

Abstract : For 50 years, human-computer interaction has evolved permanently. Nowadays, real-time systems offer the user simple and intuitive interaction and adapt automatically to the observed and interpreted activity. From now on, the user can interact with computer systems, voluntarily or unconsciously, by several modalities, as he would do it in his everyday life.Currently, the most developed systems are the ones allowing the user to interact by his explicit or implicit body language. These systems are more and more integrated in our environment, are invisible, and adapt according to the scenario that defines the objectives the user has to achieve. Several application fields are the development frameworks of such systems, like video games or video surveillance. We define in this work the architecture of an interactive system, upon which runs a scripted application such as a video game. The interactivity is fed by an only user body language, in real-time and without markers. The system reacts as well to various events taking place within the real scene. These events aredue to the scene dynamism for which the user is not directly responsible (illumination changes, spectators, etc.).The user is immersed within a virtual environment that renders the system interactive response. The system responds adaptively as well, in real-time, to the observed and interpreted activity, adapting at the same time its interactive response and its global functioning. Our work is based on the following hypothesis: the activity, observed within the scene, is characterized by the interaction context that includes it. Thus, our system recognizes the activity by modelling the interaction context within which it takes place. Our main contribution is then the introduction of the notion of context within the interactive and adaptive processes. We use our interaction context modelling to model the application scenario. The context management and analysis during the interactivity allow the system to interpret the observed activity and to configure the different adaptive mechanisms which follow it. The activity is captured and codified by an extended system, chosen according to our work industrial framework (Industrial Convention of Formation by Research – CIFRE – with XDProductions). Initially dedicated to the invasive capture of the user movements in a controlled environment, our work enhances the process towards the general capture of the global activity, without markers and within an uncontrolled environment. Finally, we have developed an application immersing the user within a virtual simulation of tennis training. Thanks to different case studies extracted from this scenario, we have implemented the interactive and adaptive processes taking place between the system and the user. The system adaptivity, supported by the application scenario, is materialized by the implementation of specific mechanisms at every level of the architecture, according to the observed and interpreted activity. We have brought to light a set of software loops, called virtuous loops, generated by the accumulation of the system adaptation effects and improving the interactivity permanently. Our work perspectives concern the formalization and the high-level management of our context model, the complexity of our scenario and the improvement of our capture systemwithin the framework of new scripted applications.
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François Picard. Contextualisation & Capture de Gestuelles Utilisateur : Contributions à l'Adaptativité des Applications Interactives Scénarisées. Autre [cs.OH]. Université de La Rochelle, 2011. Français. ⟨NNT : 2011LAROS332⟩. ⟨tel-00691944⟩

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