Ms. Jessica Prevoteau Profile

Jessica Prevoteau

at Univ de Reims Champagne-Ardenne

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Proceedings Article | 27 January 2011 Paper

Instrument for 3D characterization of autostereoscopic displays

J. Prévoteau, S. Chalençon-Piotin, D. Debons, L. Lucas, Y. Remion

Proceedings Volume 7864, 786407 (2011) https://doi.org/10.1117/12.872120

KEYWORDS: Autostereoscopic displays, Mirrors, 3D displays, Standards development, Image quality, Glasses, 3D vision, Visualization, Stereoscopy, Reconnaissance

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We now have numerous autostereoscopic displays, and it is mandatory to characterize them because it will allow to optimize their performances and to make efficient comparison between them. Therefore we need standards so we have to be able to quantify the quality of the viewer's perception. The purpose of the present paper is twofold; we first present a new instrument of characterization of the 3D perception on a given autostereoscopic display; then we propose a new way to realize an experimental protocol allowing to get a full characterization. This instrument will allow us to compare efficiently the different autostereoscopic displays but it will also validate practically the adequacy between the shooting and rendering geometries. In this aim, we are going to match a perceived scene with the virtual scene. It is hardly possible to determine the scene perceived by a viewer placed in front of an autostereoscopic display. Indeed if it may be executable on the pop-out, it is impossible on the depth effect because the depth of the virtual scene is set behind the screen. Therefore, we will have to use an optical illusion based on the deflection of light by a mirror to know the position which the viewer perceives some points of the virtual scene on an autostereoscopic display.

Proceedings Article | 1 March 2010 Paper

Real 3D video capturing for multiscopic rendering with controlled distortion

J. Prévoteau, S. Chalençon-Piotin, D. Debons, L. Lucas, Y. Remion

Proceedings Volume 7524, 75240Y (2010) https://doi.org/10.1117/12.838829

KEYWORDS: Distortion, Cameras, 3D displays, Imaging systems, 3D image processing, Video, Eye, Autostereoscopic displays, 3D modeling, 3D acquisition

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Today, 3D viewing devices still need qualitative content; up to now, there is no real 3D video shooting system specifically designed to ensure a qualitative 3D experience on some pre-chosen 3D display. A fundamental element of multiscopic image production is the geometrical analysis of shooting and viewing conditions in order to obtain a qualitative 3D perception experience. Many autostereoscopic camera systems are proposed but none is designed with control of possible depth distortions in mind. This article introduces a patented autostereoscopic camera design scheme based upon this distortion control. Thanks to our scientific know-how, we based our work on the link between the shooting and rendering geometries, which enables to control the distortion of the perceived depth. Thus this design scheme provides camera systems producing qualitative 3D content complying with any pre-chosen distortion when rendered on any specific autostereoscopic display. Thanks to our technological expertise, we use this design scheme to product pre-industrial camera systems devoted to 3D live or pre-recorded shooting. These systems are compact, lightweight, easy to deploy and rather adaptable to other conditions (3D displays, depth distortion). We will introduce the associated software, which allows to control our 3D cameras and to display in real-time on the autostereoscopic display formerly specified. According to numerous spectators, both naive and expert, the 3D perception is really qualitative.

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