@InProceedings{MirandaCele:2011:AcVoRe,
author = "Miranda, F{\'a}bio Markus and Celes, Waldemar",
affiliation = "{Tecgraf/PUC-Rio - Computer Science Department} and
{Tecgraf/PUC-Rio - Computer Science Department}",
title = "Accurate volume rendering of unstructured hexahedral meshes",
booktitle = "Proceedings...",
year = "2011",
editor = "Lewiner, Thomas and Torres, Ricardo",
organization = "Conference on Graphics, Patterns and Images, 24. (SIBGRAPI)",
publisher = "IEEE Computer Society",
address = "Los Alamitos",
keywords = "rendering, hexahedral mesh, unstructured mesh, ray integral.",
abstract = "Important engineering applications use unstructured hexahedral
meshes for numerical simulations. Hexahedral cells, when compared
to tetrahedral ones, tend to be more numerically stable and to
require less mesh refinement. However, volume visualization of
unstructured hexahedral meshes is challenging due to the trilinear
variation of scalar fields inside the cells. The conventional
solution consists in subdividing each hexahedral cell into five or
six tetrahedra, approximating a trilinear variation by a piecewise
linear function. This results in inaccurate images and increases
the memory consumption. In this paper, we present an accurate
ray-casting volume rendering algorithm for unstructured hexahedral
meshes. In order to capture the trilinear variation along the ray,
we propose the use of quadrature integration. A set of
computational experiments demonstrates that our proposal produces
accurate results, with reduced memory footprint. The entire
algorithm is implemented on graphics cards, ensuring competitive
performance.",
conference-location = "Macei{\'o}, AL, Brazil",
conference-year = "28-31 Aug. 2011",
doi = "10.1109/SIBGRAPI.2011.3",
url = "http://dx.doi.org/10.1109/SIBGRAPI.2011.3",
language = "en",
ibi = "8JMKD3MGPBW34M/3A3L6JE",
url = "http://urlib.net/ibi/8JMKD3MGPBW34M/3A3L6JE",
targetfile = "paper.pdf",
urlaccessdate = "2024, Apr. 27"
}