Interactive Global Light Propagation in Direct Volume Rendering using Local Piecewise Integration

Hernell, Frida; Ljung, Patric; Ynnerman, Anders

Interactive Global Light Propagation in Direct Volume Rendering using Local Piecewise Integration

Files

105-112.pdf (378.88 KB)

Date

2008

Authors

Hernell, Frida
Ljung, Patric
Ynnerman, Anders

Publisher

The Eurographics Association

Abstract

A novel technique for efficient computation of global light propagation in interactive DVR is presented in this paper. The approach is based on a combination of local shadows from the vicinity of each voxel with global shadows calculated at high resolution but stored in a sparser grid. The resulting intensities are then used as the initial illumination for an additional pass that computes first order scattering effects. The method captures global shadowing effects with enhanced shadows of near structures. A GPU framework is used to evaluate the illumination updates at interactive frame rates, using incremental refinements of the in-scattered light.

        @inproceedings{10.2312:VG/VG-PBG08/105-112
,
booktitle = {IEEE/ EG Symposium on Volume and Point-Based Graphics
},
editor = {Hans-Christian Hege and David Laidlaw and Renato Pajarola and Oliver Staadt
},
title = {{Interactive Global Light Propagation in Direct Volume Rendering using Local Piecewise Integration
}},
author = {Hernell, Frida and 
Ljung, Patric and 
Ynnerman, Anders
},
year = {2008
},
publisher = {The Eurographics Association
},
ISSN = {1727-8376
},
ISBN = {978-3-905674-12-5
},
DOI = {10.2312/VG/VG-PBG08/105-112
}
}