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



ID: 231352.0, MPI für Informatik / Computer Graphics Group
Exploiting Temporal Coherence in Final Gathering for Dynamic Scenes
Authors:Tawara, Takehiro; Myszkowski, Karol; Seidel, Hans-Peter
Editors:Cohen-Or, Daniel; Jain, Lakhmi; Magnenat-Thalmann, Nadia
Language:English
Publisher:IEEE
Place of Publication:Los Alamitos, USA
Date of Publication (YYYY-MM-DD):2004
Title of Proceedings:Computer Graphics International (CGI 2004)
Start Page:110
End Page:119
Place of Conference/Meeting:Crete, Greece
(Start) Date of Conference/Meeting
 (YYYY-MM-DD):
2004-06-16
Audience:Experts Only
Intended Educational Use:No
Abstract / Description:Efficient global illumination computation in dynamically
changing environments is an important practical
problem. In high-quality animation rendering
costly "final gathering" technique is commonly
used. We extend this technique into temporal domain
by exploiting coherence between the subsequent frames.
For this purpose we store previously computed
incoming radiance samples and refresh them evenly in space and
time using some aging criteria. The approach is
based upon a two-pass photon mapping algorithm with irradiance
cache, but it can be applied also in other gathering methods. The
algorithm significantly reduces the cost of expensive indirect
lighting computation and suppresses temporal aliasing
with respect to the state of the art frame-by-frame
rendering techniques.
Last Change of the Resource (YYYY-MM-DD):2005-04-27
External Publication Status:published
Document Type:Conference-Paper
Communicated by:Hans-Peter Seidel
Affiliations:MPI für Informatik/Computer Graphics Group
Identifiers:LOCALID:C125675300671F7B-6EA03CEF62237DD0C1256E46006A8293-...
ISBN:0-7695-2171-1
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