Abstract
Most augmented reality systems enhance the user's view of their immediate surroundings, either through an optical see- through head-mounted display or using a camera mounted on the HMD to provide input to the video displays. In our system the user, wearing an immersive HMD, views the stereoscopic video images of a remote scene, provided by a pair of miniature CCD cameras mounted on a stereohead which is located in a remote environment. This four-degree-of-freedom stereohead was developed for our active telepresence system and is controlled in real-time by the motion of the operator's head. Off-the- shelf software, designed for generating and controlling virtual environments, is used to create the stereographic overlays for our augmented reality application. In order for the virtual images to be accurately registered with real scene, the virtual images must be drawn from the same viewpoint and perspective as the cameras. The paper reviews the calibration methods employed in other augmented reality systems to determine these viewpoint parameters and presents the results of our initial calibration experiments.© (1997) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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