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Delta light propagation volumes for mixed reality

: Franke, Tobias


Institute of Electrical and Electronics Engineers -IEEE-; IEEE Computer Society, Technical Committee on Visualization and Graphics:
12th IEEE International Symposium on Mixed and Augmented Reality, ISMAR 2013 : 1-4 October 2013, Adelaide
Los Alamitos: IEEE Computer Society, 2013
ISBN: 978-1-4799-2869-9
International Symposium on Mixed and Augmented Reality (ISMAR) <12, 2013, Adelaide>
Conference Paper
Fraunhofer IGD ()
mixed realities; global illumination; realtime

Indirect illumination is an important visual cue which has traditionally been neglected in mixed reality applications. We present Delta Light Propagation Volumes, a novel volumetric relighting method for real-time mixed reality applications which allows to simulate the effect of first bounce indirect illumination of synthetic objects onto a real geometry and vice versa. Inspired by Radiance Transfer Fields, we modify Light Propagation Volumes in such a way as to propagate the change in illumination caused by the introduction of a synthetic object into a real scene. This method combines real and virtual light in one representation, provides improved temporal coherence for indirect light compared to previous solutions and implicitly includes smooth shadows.