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



ID: 356558.0, MPI für Informatik / Computer Graphics Group
Convolution Shadow Maps
Authors:Annen, Thomas; Mertens, Tom; Bekaert, Philippe; Seidel, Hans-Peter; Kautz, Jan
Language:English
Publisher:Eurographics
Place of Publication:Aire-la-Ville, Switzerland
Date of Publication (YYYY-MM-DD):2007
Title of Proceedings:Rendering Techniques 2007: [18th] Eurographics Symposium on Rendering
Start Page:51
End Page:60
Place of Conference/Meeting:Grenoble, France
(Start) Date of Conference/Meeting
 (YYYY-MM-DD):
2007-06-25
End Date of Conference/Meeting 
 (YYYY-MM-DD):
2007-06-27
Audience:Experts Only
Intended Educational Use:No
Abstract / Description:We present \emph{Convolution Shadow Maps}, a novel shadow representation that
affords efficient arbitrary linear filtering of shadows. Traditional shadow
mapping is inherently non-linear w.r.t.\ the stored depth values due to the
binary shadow test. We linearize the problem by approximating shadow maps as a
weighted summation of basis terms. We demonstrate the usefulness of
this representation and show that hardware-accelerated anti-aliasing
techniques, such as tri-linear filtering, can be applied naturally to
Convolution Shadow Maps.
This approach can be implemented very efficiently in current generation
graphics hardware
yielding real-time frame rates.
Last Change of the Resource (YYYY-MM-DD):2008-03-12
External Publication Status:published
Document Type:Conference-Paper
Communicated by:Hans-Peter Seidel
Affiliations:MPI für Informatik/Computer Graphics Group
Identifiers:LOCALID:C12573CC004A8E26-534CA48BCE4C3DB8C12572E300558631-...
DOI:10.2312/EGWR/EGSR07/051-060
ISBN:978-3-905673-52-4
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