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          Institute: MPI für Informatik     Collection: Computer Graphics Group     Display Documents

ID: 428109.0, MPI für Informatik / Computer Graphics Group
Direct Visualization of Real-World Light Transport
Authors:Hullin, Matthias B.; Fuchs, Martin; Ihrke, Ivo; Ajdin, Boris; Seidel, Hans-Peter; Lensch, Hendrik P. A.
Publisher:Akademische Verlagsgesellschaft AKA
Place of Publication:Heidelberg
Date of Publication (YYYY-MM-DD):2008
Title of Proceedings:Vision, Modeling, and Visualization 2008 (VMV 2008) : proceedings
Start Page:363
End Page:371
Place of Conference/Meeting:Konstanz, Germany
(Start) Date of Conference/Meeting
End Date of Conference/Meeting 
Audience:Experts Only
Intended Educational Use:No
Abstract / Description:Light transport in complex scenes with possibly
intricate optical properties is difficult to grasp intuitively.
The study of light transport has so far
mainly been conducted by indirect observations.
Cameras or human observers typically only sense
the radiance reflected from a scene, i.e. the light directly
emitted or reflected from the last bounce of a
possibly much longer light path.
Models for the propagation of light, however,
typically assume light waves or rays, concepts
which so far have been communicated in an abstract
way using formulas or sketches. In this paper, we
propose the use of fluorescent fluids for direct visualization
of light transport in the real world. In
the fluorescent fluid the traces of light become visible
as a small fraction of the energy transported
along the ray is scattered out towards the viewer.
We demonstrate this visualization for direct illumination
effects such as reflections and refractions at
various surfaces, as well as for global effects such
as subsurface light transport in translucent material,
caustics, or interreflections. As this allows for the
inspection of entire light paths, rather than the last
scattering event, we believe that this novel visualization
can help to intuitively explain the phenomena
of light transport to students and experts alike.
Last Change of the Resource (YYYY-MM-DD):2009-03-25
External Publication Status:published
Document Type:Conference-Paper
Communicated by:Hans-Peter Seidel
Affiliations:MPI f�r Informatik/Computer Graphics Group
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