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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/12778

Title: Rendering Wave Effects with Augmented Light Field
Authors: OH, SB
KASHYAP, S
GARG, R
CHANDRAN, S
RASKAR, R
Keywords: wigner functions
radiometry
coherence
space
Issue Date: 2010
Publisher: WILEY-BLACKWELL PUBLISHING, INC
Citation: COMPUTER GRAPHICS FORUM, 29(2), 507-516
Abstract: Ray-based representations can model complex light transport but are limited in modeling diffraction effects that require the simulation of wavefront propagation. This paper provides a new paradigm that has the simplicity of light path tracing and yet provides an accurate characterization of both Fresnel and Fraunhofer diffraction. We introduce the concept of a light field transformer at the interface of transmissive occluders. This generates mathematically sound, virtual, and possibly negative-valued light sources after the occluder. From a rendering perspective the only simple change is that radiance can be temporarily negative. We demonstrate the correctness of our approach both analytically, as well by comparing values with standard experiments in physics such as the Young's double slit. Our implementation is a shader program in OpenGL that can generate wave effects on arbitrary surfaces.
URI: http://dx.doi.org/10.1111/j.1467-8659.2009.01620.x
http://dspace.library.iitb.ac.in/xmlui/handle/10054/12778
http://hdl.handle.net/10054/12778
ISSN: 0167-7055
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