ABSTRACT
Early work in augmented reality grew out of virtual reality research do mains. These initial augmented reality systems applied the same methods and technology as virtual reality systems to solve what at first appeared to be a similar problem: render correctly a scene of virtual objects as the user changes viewpoint in the world. This is indeed a shared goal of aug mented and virtual reality systems. In virtual reality systems, our sense of presence is primarily controlled by the degree to which the visual stimulus presented corresponds to our kinesthetic senses. Augmented reality sys tems have an additional performance constraint: the correct registration between the user’s view of the real scene and the virtual objects augment ing it. It is a more difficult task to maintain a compelling sense of presence when there are discrepancies between these two visual stimuli.
