Paper Info
Title
Accurate Volume Rendering of Unstructured Hexahedral Meshes
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.
Year
DOI
Venue
2011
10.1109/SIBGRAPI.2011.3
Graphics, Patterns and Images
Keywords
Field
DocType
reduced memory footprint,hexahedral cell,entire algorithm,unstructured hexahedral meshes,memory consumption,unstructured hexahedral mesh,accurate ray-casting volume rendering,trilinear variation,accurate volume,hexahedral mesh,volume visualization,accurate result,mesh generation,volume rendering,ray casting,approximation theory,computational geometry,scalar field,numerical simulation,numerical analysis,piecewise linear,computer experiment
Hexahedron,Volume rendering,Polygon mesh,Computer graphics (images),Computer science,Computational geometry,Computational science,Memory footprint,Tetrahedron,Piecewise linear function,Mesh generation
Conference
ISBN
Citations 
PageRank 
978-1-4577-1674-4
1
0.36
References 
Authors
15
2
Name
Order
Citations
PageRank
Fábio Markus Miranda151.11
Waldemar Celes214115.93