Chair for Computer Aided Medical Procedures & Augmented Reality
Lehrstuhl für Informatikanwendungen in der Medizin & Augmented Reality

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J. Newman, M. Wagner, T. Pintaric, A. MacWilliams, M. Bauer, G. Klinker, D. Schmalstieg
Fundamentals of Ubiquitous Tracking for Augmented Reality
Technical Report TUM-I0323, Technische Universität München; Technical Report TR-188-2-2003-34, Vienna University of Technology (bib)

To enable rich and meaningful Augmented Reality (AR) experiences within a Ubiquitous Computing environment, a detailed, coherent and up-to-date spatial model of the world is essential. However, current tracking technologies are limited in their range and operating environments. This has, so far, restricted the development of wide-area AR applications. To extend the range of AR applications, it will be necessary to combine widely different tracking technologies dynamically, aggregating their data and balancing their trade-offs. In this paper, we propose a formal framework, called Ubiquitous Tracking, which uses a graph-based model of spatial relationships to build dynamically extendible networks of trackers suitable for the high-precision, low-latency requirements of Augmented Reality. The framework is powerful, allowing us to model existing complex tracking setups; extensible, accommodating new trackers, filtering schemes and optimisation criteria; and efficient, allowing an effective implementation within existing AR systems.
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