Impact des technologies 3D et des stimuli environnementaux sur la perception stéréo de la vision

Comfort viewing experience has been a permanent goal in stereoscopic research due to the development of 3D technologies. However, various parameters affect stereo vision perception. In this thesis, a series of physiological experiments have been carried out aiming at evaluating the 3D visual perception with respect to 3 of the most important factors: 3D display technology, viewing environments and motion-in-depth (MID) perception. First we measured vertical fusion amplitude (VFA) on 3D projectors and an autostereoscopic TV. VFA was chosen as an indicator for visual comfort due to our strong sensitivity to vertical disparity. Several factors have been tested (e.g. viewing distance, background luminance, crosstalk, viewing angle etc.). We compared observer performance on both 3D displays and concluded the tolerance for vertical disparity was better on 3D projector than on autostereoscopic TV. For the environment effect, we measured VFA on a 3D projector by varying the room lighting, 3D content complexity, disparity velocity. We assessed the interaction between central and peripheral fusion, by introducing a series of base-up prisms in front of one eye. We observed that the fusion balance of central and peripheral vision was broken when large peripheral disparities (>4 prism diopter) or stimulus sizes (central stimulus angle 4 dioptries prismatiques) ou tailles de stimuli (angle central du stimulus < 15 °) étaient induites sur la vision périphérique. Enfin, nous avons étudié l'interaction entre le système sensoriel et oculomoteur en stimulation MID. Les premiers résultats indiquent que les post-effets générés par stimulation sensorielle pouvaient être partiellement atténués par des stimulations oculomotrices. Nous avons en outre identifié certains facteurs critiques pour la génération de contenu 3D pour améliorer la perception MID, comme la texture de fond, le temps de fixation objet et la durée de vie des random dots