filename     : Osk11.pdf
entry        : inproceedings
conference   : SIGGRAPH Asia 2011, Hong Kong, China, 12 - 15 December 2011
pages        : 189:1-189:8
year         : 2011
month        : December
title        : OSCAM - Optimized Stereoscopic Camera Control for Interactive 3D
subtitle     : 
author       : Thomas Oskam, Alexander Hornung, Huw Bowles, Kenny Mitchell, Markus Gross
booktitle    : SA '11 Proceedings of the 2011 SIGGRAPH Asia Conference 
ISSN/ISBN    : 978-1-4503-0807-6
editor       : 
publisher    : ACM New York
publ.place   : New York, USA
volume       : 30
issue        : 6
language     : English
keywords     : stereoscopic 3D, disparity control, real-time graphics, games, interactive 3D
abstract     : This paper presents a controller for camera convergence and interaxial separation that specifically addresses challenges in interactive stereoscopic applications like games. In such applications, unpredictable viewer- or object-motion often compromises stereopsis due to excessive binocular disparities. We derive constraints on the camera separation and convergence that enable our controller to automatically adapt to any given viewing situation and 3D scene, providing an exact mapping of the virtual content into a comfortable depth range around the display. Moreover, we introduce an interpolation function that linearizes the transformation of stereoscopic depth over time, minimizing nonlinear visual distortions. We describe how to implement the complete control mechanism on the GPU to achieve running times below 0.2ms for full HD. This provides a practical solution even for demanding real-time applications. Results of a user study show a significant increase of stereoscopic comfort, without compromising perceived realism. Our controller enables "fail-safe" stereopsis, provides intuitive control to accommodate to personal preferences, and allows to properly display stereoscopic content on differently sized output devices.