Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Efficient Image-Based Methods for Rendering Soft Shadows Maneesh Agrawala
 

Summary: Efficient Image-Based Methods for Rendering Soft Shadows
Maneesh Agrawala
Pixar Animation Studios
Ravi Ramamoorthi
Stanford University
Alan Heirich Laurent Moll
Compaq Computer Corporation
Figure 1: A plant rendered using our interactive layered attenuation-map approach (left), rayshade (middle), and our efficient high-quality coherence-based
raytracing approach (right). Note the soft shadows on the leaves. To emphasize the soft shadows, this image is rendered without cosine falloff of light intensity.
Model courtesy of O. Deussen, P. Hanrahan, B. Lintermann, R. Mech, M. Pharr, and P. Prusinkiewicz.
Abstract
We present two efficient image-based approaches for computation
and display of high-quality soft shadows from area light sources.
Our methods are related to shadow maps and provide the associ-
ated benefits. The computation time and memory requirements for
adding soft shadows to an image depend on image size and the
number of lights, not geometric scene complexity. We also show
that because area light sources are localized in space, soft shadow
computations are particularly well suited to image-based render-
ing techniques. Our first approach--layered attenuation maps--

  

Source: Agrawala, Maneesh - Department of Electrical Engineering and Computer Sciences, University of California at Berkeley
Columbia University, Department of Computer Science, Computer Graphics Group
O'Brien, James F. - Department of Electrical Engineering and Computer Sciences, University of California at Berkeley
Stanford University - Computer Graphics Laboratory

 

Collections: Computer Technologies and Information Sciences