Abstract
Introduces a collaborative augmented reality (AR) system for real-time interactive operations. AR enables us to enhance physical space with computer-generated virtual space. In addition, collaborative AR allows multiple participants to simultaneously share the physical space surrounding them and a virtual space that is visually registered with the physical one. They can also communicate with each other through the mixed space. This paper describes the AR/sup 2/Hockey (Augmented Reality AiR Hockey) system, where players can share a physical game field and mallets, and a virtual puck to play an air-hockey game, as a case study of a collaborative AR system. Since real-time accurate registration between both spaces and players is crucial for the collaboration, a video-rate registration algorithm is implemented with magnetic head-trackers and video cameras attached to optical see-through head-mounted displays (HMDs). The configuration of the system and the details of the registration are described. Our experimental collaborative AR system achieves higher interactivity than a totally immersive collaborative VR system.
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