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Beitrag in Tagungsband, Workshop


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Author, Editor

Author(s):

Annen, Thomas
Kautz, Jan
Durand, Frédo
Seidel, Hans-Peter

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Not MPG Author(s):

Kautz, Jan
Durand, Frédo

Editor(s):

Keller, Alexander
Jensen, Henrik Wann

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Not MPII Editor(s):

Keller, Alexander
Jensen, Henrik Wann

BibTeX cite key*:

Annen:EGSR:2004

Title, Booktitle

Title*:

Spherical Harmonic Gradients for Mid-Range Illumination

Booktitle*:

Rendering Techniques 2004 : Eurographics Symposium on Rendering

Event, URLs

URL of the conference:

http://www.egsr2004.org/

URL for downloading the paper:

http://www.mpi-sb.mpg.de/~tannen/papers/gradientSH.pdf

Event Address*:

Norrköping, Sweden

Language:

English

Event Date*
(no longer used):


Organization:

Eurographics Association

Event Start Date:

21 June 2004

Event End Date:

23 June 2004

Publisher

Name*:

Eurographics

URL:


Address*:

Aire-la-Ville, Switzerland

Type:


Vol, No, Year, pp.

Series:


Volume:


Number:


Month:

June

Pages:

331-336

Year*:

2004

VG Wort Pages:


ISBN/ISSN:

3-905673-12-6

Sequence Number:


DOI:




Note, Abstract, ©


(LaTeX) Abstract:

Spherical harmonics are often used for compact description of
incident radiance in low-frequency but distant lighting
environments. For interaction with nearby emitters, computing
the incident radiance at the center of an object only is
not sufficient. Previous techniques then require expensive
sampling of the incident radiance field at many points
distributed over the object. Our technique alleviates this
costly requirement using a first-order Taylor expansion of the
spherical-harmonic lighting coefficients around a point. We
propose an interpolation scheme based on these gradients
requiring far fewer samples (one is often sufficient). We show
that the gradient of the incident-radiance spherical harmonics
can be computed for little additional cost compared to the
coefficients alone. We introduce a semi-analytical formula to
calculate this gradient at run-time and describe how a simple vertex shader can interpolate the shading. The interpolated
representation of the incident radiance can be used with any
low-frequency light-transfer technique.

Keywords:

Color, Shading, Shadowing and Texture



Download
Access Level:

Public

Correlation

MPG Unit:

Max-Planck-Institut für Informatik



MPG Subunit:

Computer Graphics Group

Appearance:

MPII WWW Server, MPII FTP Server, MPG publications list, university publications list, working group publication list, Fachbeirat, VG Wort



BibTeX Entry:

@INPROCEEDINGS{Annen:EGSR:2004,
AUTHOR = {Annen, Thomas and Kautz, Jan and Durand, Fr{\'e}do and Seidel, Hans-Peter},
EDITOR = {Keller, Alexander and Jensen, Henrik Wann},
TITLE = {Spherical Harmonic Gradients for Mid-Range Illumination},
BOOKTITLE = {Rendering Techniques 2004 : Eurographics Symposium on Rendering},
PUBLISHER = {Eurographics},
YEAR = {2004},
ORGANIZATION = {Eurographics Association},
PAGES = {331--336},
ADDRESS = {Norrk{\"o}ping, Sweden},
MONTH = {June},
ISBN = {3-905673-12-6},
}


Entry last modified by Christine Kiesel, 09/21/2009
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Editor(s)
Thomas Annen
Created
06/25/2004 10:53:18 AM
Revisions
4.
3.
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1.
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Editor(s)
Christine Kiesel
Anja Becker
Anja Becker
Anja Becker
Anja Becker
Edit Dates
24.05.2005 15:27:51
03.02.2005 11:57:19
03.02.2005 10:38:14
03.02.2005 10:35:55
25.06.2004 10:53:18
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