Exploring MARS: developing indoor and outdoor user interfaces to a mobile augmented reality system

We describe an experimental mobile augmented reality system (MARS) testbed that employs different user interfaces to allow outdoor and indoor users to access and manage information that is spatially registered with the real w orld. Outdoor users can experience spatialized multimedia presentations tha t are presented on a head-tracked, see-through, head-worn display used in c onjunction with a hand-held pen-based computer. Indoor users can get an ove rview of the outdoor scene and communicate with outdoor users through a des ktop user interface or a head- and hand-tracked immersive augmented reality user interface. (C) 1999 Elsevier Science Limited. All rights reserved.