DocumentCode :
54444
Title :
Lighting Design for Globally Illuminated Volume Rendering
Author :
Yubo Zhang ; Kwan-Liu Ma
Author_Institution :
Univ. of California, Davis, Davis, CA, USA
Volume :
19
Issue :
12
fYear :
2013
fDate :
Dec. 2013
Firstpage :
2946
Lastpage :
2955
Abstract :
With the evolution of graphics hardware, high quality global illumination becomes available for real-time volume rendering. Compared to local illumination, global illumination can produce realistic shading effects which are closer to real world scenes, and has proven useful for enhancing volume data visualization to enable better depth and shape perception. However, setting up optimal lighting could be a nontrivial task for average users. There were lighting design works for volume visualization but they did not consider global light transportation. In this paper, we present a lighting design method for volume visualization employing global illumination. The resulting system takes into account view and transfer-function dependent content of the volume data to automatically generate an optimized three-point lighting environment. Our method fully exploits the back light which is not used by previous volume visualization systems. By also including global shadow and multiple scattering, our lighting system can effectively enhance the depth and shape perception of volumetric features of interest. In addition, we propose an automatic tone mapping operator which recovers visual details from overexposed areas while maintaining sufficient contrast in the dark areas. We show that our method is effective for visualizing volume datasets with complex structures. The structural information is more clearly and correctly presented under the automatically generated light sources.
Keywords :
data visualisation; lighting; rendering (computer graphics); automatic tone mapping operator; back light; depth perception; global light transportation; global shadow; globally illuminated volume rendering; graphics hardware; lighting design; local illumination; multiple scattering; realtime volume rendering; shading effects; shape perception; transfer-function dependent content; view dependent content; volume data visualization; volume visualization; volumetric features; Data visualization; Image color analysis; Light sources; Lighting; Rendering (computer graphics); Volume rendering; Data visualization; Global illumination; Image color analysis; Light sources; Lighting; Rendering (computer graphics); Volume rendering; lighting design; tone mapping; volume rendering; Algorithms; Computer Graphics; Computer-Aided Design; Image Enhancement; Image Interpretation, Computer-Assisted; Imaging, Three-Dimensional; Light; Lighting; Reproducibility of Results; Scattering, Radiation; Sensitivity and Specificity; User-Computer Interface;
fLanguage :
English
Journal_Title :
Visualization and Computer Graphics, IEEE Transactions on
Publisher :
ieee
ISSN :
1077-2626
Type :
jour
DOI :
10.1109/TVCG.2013.172
Filename :
6634193
Link To Document :
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