Search For:

Displaying 1-6 out of 6 total
Connectivity Oblivious Merging of Triangulations
Found in: 2012 XXV SIBGRAPI - Conference on Graphics, Patterns and Images (SIBGRAPI)
By Luis F. Silva,Luiz F. Scheidegger,Tiago Etiene,Joao L. D. Comba,Luis G. Nonato,Claudio T. Silva
Issue Date:August 2012
pp. 118-125
Simplicial meshes are extremely useful as discrete approximations of continuous spaces in numerical simulations. In some applications, however, meshes need to be modified over time. Mesh update operations are often expensive and brittle, which tends to mak...
 
Topology Verification for Isosurface Extraction
Found in: IEEE Transactions on Visualization and Computer Graphics
By Tiago Etiene,L. G. Nonato,C. Scheidegger,J. Tienry,T. J. Peters,V. Pascucci,R. M. Kirby,C. T. Silva
Issue Date:June 2012
pp. 952-965
The broad goals of verifiable visualization rely on correct algorithmic implementations. We extend a framework for verification of isosurfacing implementations to check topological properties. Specifically, we use stratified Morse theory and digital topolo...
 
Verifiable Visualization for Isosurface Extraction
Found in: IEEE Transactions on Visualization and Computer Graphics
By Tiago Etiene, Carlos Scheidegger, Luis Gustavo Nonato, Robert Mike Kirby, Cláudio Silva
Issue Date:November 2009
pp. 1227-1234
Visual representations of isosurfaces are ubiquitous in the scientific and engineering literature. In this paper, we present techniques to assess the behavior of isosurface extraction codes. Where applicable, these techniques allow us to distinguish whethe...
 
Robust and Adaptive Surface Reconstruction using Partition of Unity Implicits
Found in: Graphics, Patterns and Images, SIBGRAPI Conference on
By Joao Paulo Gois, Valdecir Polizelli-Junior, Tiago Etiene, Eduardo Tejada, Antonio Castelo, Thomas Ertl, Luis Gustavo Nonato
Issue Date:October 2007
pp. 95-104
Implicit surface reconstruction from unorganized point sets has been recently approached with methods based on multi-level partition of unity. We improve this approach by addressing local approximation robustness and iso-surface extraction issues. Our meth...
 
Curvature-driven Modeling and Rendering of Point-Based Surfaces
Found in: Graphics, Patterns and Images, SIBGRAPI Conference on
By Joao Paulo Gois, Eduardo Tejada, Tiago Etiene, Luis Gustavo Nonato, Antonio Castelo, Thomas Ertl
Issue Date:October 2006
pp. 27-36
In this work we address the problem of computing pointbased surface approximations from point clouds. Our approach is based on recently presented methods that define the approximated surface as the set of stationary points for an operator that projects poi...
 
Verifying Volume Rendering Using Discretization Error Analysis
Found in: IEEE Transactions on Visualization and Computer Graphics
By Tiago Etiene,Daniel Jonsson,Timo Ropinski,Carlos Scheidegger,Joao L. D. Comba,Luis Gustavo Nonato,Robert M. Kirby,Anders Ynnerman,Claudio T. Silva
Issue Date:January 2014
pp. 140-154
We propose an approach for verification of volume rendering correctness based on an analysis of the volume rendering integral, the basis of most DVR algorithms. With respect to the most common discretization of this continuous model (Riemann summation), we...
 
 1