OSGAR extends OpenSceneGraph so that it will be suitable to be used for AR applications, by supporting transformations that have uncertainty associated with them. Building on the fundamental notion of uncertain transformation, OSGAR provides programmers with a range of facilities for querying and acting upon estimated registration error.
The following are a sample of the kinds capabilities we are adding to the scene graph:
- Display a video stream as a background (Video AR)
- Detect artificial markers
- Connect to different sensors through a VRPN client
- Handle multiple sensors (combiners)
- Computer registration error estimates in real time
This work is supported by ONR Contract N000140010361.
Associated Papers Enylton Machado Coelho. "Spatially Adaptive Augmented Reality" PhD Thesis, Georgia Institute of Technology, 2005 [details] Enylton Machado Coelho, Blair MacIntyre and Simon J. Julier. "Supporting Interaction in Augmented Reality in the Presence of Uncertain Spatial Knowledge" In the Eighteenth Annual ACM Symposium on User Interface Software and Technology (UIST 2005), October 23-26, 2005, Seattle, Washington.
[details] Enylton Machado Coelho, Blair MacIntyre, and Simon Julier (2004) "OSGAR: A Scene Graph with Uncertain Transformations" To appear in International Symposium on Mixed and Augmented Reality (ISMAR04), November 2-5, 2004, Washington, D.C., USA.
[details] Enylton Machado Coelho and Blair MacIntyre. "High-Level Tracker Abstractions for Augmented Reality System Design” In the International Workshop on Software Technology for AR Systems 2003 (STARS 2003), October 7, 2003, Tokyo, Japan.
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