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Scalable Hybrid Unstructured and Structured Grid Raycasting
November/December 2007 (vol. 13 no. 6)
pp. 1592-1599
ASCII Text
x 
 
Philipp Muigg, Markus Hadwiger, Helmut Doleisch, Helwig Hauser, "Scalable Hybrid Unstructured and Structured Grid Raycasting," IEEE Transactions on Visualization and Computer Graphics, vol. 13, no. 6, pp. 1592-1599, November/December, 2007.
 
 
BibTex
x
 
@article{ 10.1109/TVCG.2007.70588,
author = {Philipp Muigg and Markus Hadwiger and Helmut Doleisch and Helwig Hauser},
title = {Scalable Hybrid Unstructured and Structured Grid Raycasting},
journal ={IEEE Transactions on Visualization and Computer Graphics},
volume = {13},
number = {6},
issn = {1077-2626},
year = {2007},
pages = {1592-1599},
doi = {http://doi.ieeecomputersociety.org/10.1109/TVCG.2007.70588},
publisher = {IEEE Computer Society},
address = {Los Alamitos, CA, USA},
}
 
 
RefWorks Procite/RefMan/Endnote
x 
 
TY - JOUR
JO - IEEE Transactions on Visualization and Computer Graphics
TI - Scalable Hybrid Unstructured and Structured Grid Raycasting
IS - 6
SN - 1077-2626
SP1592
EP1599
EPD - 1592-1599
A1 - Philipp Muigg,
A1 - Markus Hadwiger,
A1 - Helmut Doleisch,
A1 - Helwig Hauser,
PY - 2007
KW - Volume Rendering of Unstructured Grids
KW - Focus+Context Techniques
KW - Hardware-Assisted Volume Rendering
VL - 13
JA - IEEE Transactions on Visualization and Computer Graphics
ER -
 
This paper presents a scalable framework for real-time raycasting of large unstructured volumes that employs a hybrid bricking approach. It adaptively combines original unstructured bricks in important (focus) regions, with structured bricks that are resampled on demand in less important (context) regions. The basis of this focus+context approach is interactive specification of a scalar degree of interest (DOI) function. Thus, rendering always considers two volumes simultaneously: a scalar data volume, and the current DOI volume. The crucial problem of visibility sorting is solved by raycasting individual bricks and compositing in visibility order from front to back. In order to minimize visual errors at the grid boundary, it is always rendered accurately, even for resampled bricks. A variety of different rendering modes can be combined, including contour enhancement. A very important property of our approach is that it supports a variety of cell types natively, i.e., it is not constrained to tetrahedral grids, even when interpolation within cells is used. Moreover, our framework can handle multi-variate data, e.g., multiple scalar channels such as temperature or pressure, as well as time-dependent data. The combination of unstructured and structured bricks with different quality characteristics such as the type of interpolation or resampling resolution in conjunction with custom texture memory management yields a very scalable system.

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Index Terms:
Volume Rendering of Unstructured Grids, Focus+Context Techniques, Hardware-Assisted Volume Rendering
Citation:
Philipp Muigg, Markus Hadwiger, Helmut Doleisch, Helwig Hauser, "Scalable Hybrid Unstructured and Structured Grid Raycasting," IEEE Transactions on Visualization and Computer Graphics, vol. 13, no. 6, pp. 1592-1599, Nov.-Dec. 2007, doi:10.1109/TVCG.2007.70588
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