Simple Collaborative Indoor-Outdoor Modelling Using Mobile Augmented Reality

1. Introduction This paper presents some preliminary results from research we have been performing in the area of collaborative 3D modelling with augmented reality (AR). While there has been a wide range of research work investigating problems such as displays and registration (Rolland and Fuchs 2000), tracking (Welch and Foxlin 2002), and user interfaces (Azuma et al. 2001), these systems are primarily focussed on improving the experience for a single, stand-alone user. Previously, we have presented a number of prototypes that allow users to perform real-time 3D modelling using a mobile AR system (Piekarski and Thomas 2003a) (Piekarski and Thomas 2004), but these were standalone applications for single users to operate. In previous papers describing our software architecture (Piekarski and Thomas 2003b), we have described how the ability to support multiuser collaborative systems is possible. In this paper we describe in more detail collaboration applications that we have developed and how they are implemented.