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



  history
ID: 279031.0, MPI für Informatik / Computer Graphics Group
Practical Shadow Mapping
Authors:Brabec, Stefan; Annen, Thomas; Seidel, Hans-Peter
Editors:Barzel, Ronan
Language:English
Place of Publication:Wellesley, Massachusetts, USA
Publisher:A.K. Peters
Date of Publication (YYYY-MM-DD):2005
Title of Book:Graphics Tools: The jgt Editors' Choice
Start Page:217
End Page:228
Full Name of Book-Editor(s):Ronan Barzel
Review Status:not specified
Audience:Experts Only
Intended Educational Use:No
Abstract / Description:In this paper, we present several methods that can greatly improve
image quality when using the shadow mapping algorithm. Shadow artifacts
introduced
by shadow mapping are mainly due to low resolution shadow maps and/or the
limited numerical precision used when performing the shadow test. These problems
especially arise when the light source’s viewing frustum, from which the shadow
map
is generated, is not adjusted to the actual camera view. We show how a
tight-fitting
frustum can be computed such that the shadow mapping algorithm concentrates
on the visible parts of the scene and takes advantage of nearly the full
available
precision. Furthermore, we recommend uniformly spaced depth values in contrast
to perspectively spaced depths in order to equally sample the scene seen from
the
light source.
Last Change of the Resource (YYYY-MM-DD):2006-04-25
External Publication Status:published
Document Type:InBook
Communicated by:Hans-Peter Seidel
Affiliations:MPI für Informatik/Computer Graphics Group
Identifiers:ISBN:1568812469
LOCALID:C125675300671F7B-A639B7B1E56416A1C12570DD00510338-...
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