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A hardware-assisted scalable solution for interactive volume rendering of time-varying data

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3 Author(s)
Lum, E.B. ; Dept. of Comput. Sci., California Univ., Davis, CA, USA ; Kwan-Liu Ma ; Clyne, J.

We present a scalable volume rendering technique that exploits lossy compression and low-cost commodity hardware to permit highly interactive exploration of time-varying scalar volume data. A palette-based decoding technique and an adaptive bit allocation scheme are developed to fully utilize the texturing capability of a commodity 3D graphics card. Using a single PC equipped with a modest amount of memory, a texture-capable graphics card and an inexpensive disk array, we are able to render hundreds of time steps of regularly gridded volume data (up to 42 million voxels each time step) at interactive rates. By clustering multiple PCs together, we demonstrate the data-size scalability of our method. The frame rates achieved make possible the interactive exploration of data in the temporal, spatial and transfer function domains. A comprehensive evaluation of our method based on experimental studies using data sets (up to 134 million voxels per time step) from turbulence flow simulations is also presented.

Published in:

Visualization and Computer Graphics, IEEE Transactions on  (Volume:8 ,  Issue: 3 )

Date of Publication:

Jul-Sep 2002

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