Augmented Reality (AR) can naturally complement mobile computing on wearable devices by providing an intuitive interface to a three-dimensional information space embedded within physical reality. Unfortunately, current wearable AR systems are relatively complex, expensive, fragile and heavy, rendering them unfit for large-scale deployment including untrained users outside constrained laboratory environments. Consequently, the scale of collaborative multi-user experiments have not yet exceeded a handful of participants. In this paper, we present a system architecture for interactive, infrastructure-independent multi-user AR applications running on off-the-shelf handheld devices. We implemented a four-user interactive game installation as an evaluation setup to encourage playful engagement of participants in a cooperative task. Over the course of five weeks, more than five thousand visitors from a wide range of professional and socio-demographic backgrounds interacted with our system at four different locations.
T. Pintaric, F. Ledermann, D. Schmalstieg, D. Wagner: "Towards Massively Multi-User Augmented Reality on Handheld Devices"; Talk: 3rd International Conference on Pervasive Computing, München, DE; 05-08-2005 - 05-13-2005; in: "Proceedings of the 3rd International Conference on Pervasive Computing (PERVASIVE 2005)", Lecture Notes in Computer Science / Springer, Volume 3468 (2005), ISBN: 3-540-26008-0; 208 - 219.
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