UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

OSGAR: A scene graph with uncertain transformations

Coelho, EM; MacIntyre, B; Julier, SJ; (2004) OSGAR: A scene graph with uncertain transformations. In: (pp. pp. 6-15).

Full text not available from this repository.


An important problem for augmented reality is registration error. No system can be perfectly tracked, calibrated or modeled. As a result, the overlaid graphics will not align perfectly with objects in the physical world. This can be distracting, annoying or confusing. In this paper we propose a method for mitigating the effects of registration errors that enables application developers to build dynamically adaptive AR displays. Our solution is implemented in a programming toolkit called OSGAR. Built upon OpenSceneGraph (OSG), OSGAR statistically characterizes registration errors, monitors those errors and, when a set of criteria are met, dynamically adapts the display to mitigate the effects of the errors. Because the architecture is based on a scene graph, it provides a simple, familiar and intuitive environment for application developers. We describe the components of OSGAR, discuss how several proposed methods for error registration can be implemented, and illustrate its use through a set of examples. © 2004 IEEE.

Type: Proceedings paper
Title: OSGAR: A scene graph with uncertain transformations
ISBN: 0769521916
DOI: 10.1109/ISMAR.2004.44
URI: http://discovery.ucl.ac.uk/id/eprint/135552
Downloads since deposit
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item