Approches visuelles pour l'amélioration de la présence en réalité virtuelle

Abstract : The feeling of presence is the ultimate goal of a virtual reality system. It can be achieved by stimulating its four pillars that are immersion, interaction, consistency of the action-perception loop and emotions. Our objective is submit methods which could increase this feeling of presence. We will especially focus on visual perception. First, we present a solution applying the stereoscopic rendering on GPU. Using the latest shaders extensions, we join the traditional two passes to a single that reduce redundant computation. Our method can also be applied on recent autostereoscopic screens which need about ten different view points. The second contribution refers to eyestrain caused when a user watches stereoscopic images during a long time. We propose to use the graphic cards to render, in real time, a blur on problematic areas thus the user will focus on the others. We also use blur to point out some objects of the virtual scene that we considerate as important and avoid to let user's eye wander. Finally, we propose a method to increase the presence of the user into the virtual environment. An avatar, based on images taken from several cameras and visual hull method, is first build. In a second stage, the avatar is integrated into the virtual scene so it seems natural to the user. Thus we use reflective surfaces like mirrors or virtual lights interactions like shadows
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Submitted on : Thursday, April 1, 2010 - 2:51:13 PM
Last modification on : Thursday, July 5, 2018 - 2:29:04 PM
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  • HAL Id : tel-00469460, version 1


François De Sorbier de Pougnadoresse. Approches visuelles pour l'amélioration de la présence en réalité virtuelle. Autre [cs.OH]. Université Paris-Est, 2008. Français. ⟨NNT : 2008PEST0205⟩. ⟨tel-00469460⟩



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