Exploring Urban Environments Using Virtual and Augmented Reality Liarokapis Fotis Brujic-Okretic Vesna Papakonstantinou Stelios In this paper, we propose the use of specific system architecture, based on mobile device, for navigation in urban environments. The aim of this work is to assess how virtual and augmented reality interface paradigms can provide enhanced location based services using real-time techniques in the context of these two different technologies. The virtual reality interface is based on faithful graphical representation of the localities of interest, coupled with sensory information on the location and orientation of the user, while the augmented reality interface uses computer vision techniques to capture patterns from the real environment and overlay additional way-finding information, aligned with real imagery, in real-time. The knowledge obtained from the evaluation of the virtual reality navigational experience has been used to inform the design of the augmented reality interface. Initial results of the user testing of the experimental augmented reality system for navigation are presented. Augmented and Virtual Environments Human-computer interaction Mobile Interfaces Virtual Tours 004 periodical academic journal JVRB - Journal of Virtual Reality and Broadcasting 3(2006) 5 2007 1860-2037 urn:nbn:de:0009-6-7720 10.20385/1860-2037/3.2006.5 http://nbn-resolving.de/urn:nbn:de:0009-6-7720 liarokapis2007