Rendering Wave Effects with Augmented Light Field

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 Fre...

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Vydáno v:Computer graphics forum Ročník 29; číslo 2; s. 507 - 516
Hlavní autoři: Oh, Se Baek, Kashyap, Sriram, Garg, Rohit, Chandran, Sharat, Raskar, Ramesh
Médium: Journal Article
Jazyk:angličtina
Vydáno: Oxford, UK Blackwell Publishing Ltd 01.05.2010
Témata:
Computer graphics
Computer simulation
Diffraction
Electrons
I.3.6 [Computer Graphics]: Methodology and Techniques-Graphics Data Structures and Data Types
I.3.7 [Computer Graphics]: Three-Dimensional Graphics and Realism-Raytracing
Image processing systems
Light
Mathematical models
Radiance
Rendering
Shaders
Systems development
Transformers
Wave propagation
ISSN:0167-7055, 1467-8659
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Shrnutí: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.
Bibliografie:ark:/67375/WNG-MWRGPWK5-4
ArticleID:CGF1620
istex:33ACCD29CAAB47E49573E8C8F530196FBB607B47
SourceType-Scholarly Journals-1
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ISSN:0167-7055
1467-8659
DOI:10.1111/j.1467-8659.2009.01620.x