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Occlusion shadows: using projected light to generate realistic occlusion effects for view-dependent optical see-through displays

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2 Author(s)
Bimber, O. ; Fraunhofer Center for Res. in Comput. Graphics, Providence, RI, USA ; Frohlich, B.

This paper presents projector-based illumination techniques for creating correct occlusion effects for optical see-through setups. We project view-dependent occlusion shadows onto the real surfaces that are located behind virtual objects. This results in a perfect occlusion of real objects by virtual ones. We have implemented and tested our approach in the context of the Virtual Showcase display. We describe a hardware extension for projecting light into the showcase and present our rendering techniques for displaying occlusion shadows for single and multi-user environments as well as for single and multi-light-projector configurations. We also report on the limitations of our system for multi-user situations and describe our experiences with a first experimental prototype.

Published in:

Mixed and Augmented Reality, 2002. ISMAR 2002. Proceedings. International Symposium on

Date of Conference:

2002

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