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Green Image
Issue No. 06 - November/December (2009 vol. 15)
ISSN: 1077-2626
pp: 1227-1234
Tiago Etiene , University of Utah
Carlos Scheidegger , University of Utah
Luis Gustavo Nonato , Universidade de São Paulo
Robert Mike Kirby , University of Utah
Cláudio Silva , University of Utah
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 whether anomalies in isosurface features can be attributed to the underlying physical process or to artifacts from the extraction process. Such scientific scrutiny is at the heart of verifiable visualization – subjecting visualization algorithms to the same verification process that is used in other components of the scientific pipeline. More concretely, we derive formulas for the expected order of accuracy (or convergence rate) of several isosurface features, and compare them to experimentally observed results in the selected codes. This technique is practical: in two cases, it exposed actual problems in implementations. We provide the reader with the range of responses they can expect to encounter with isosurface techniques, both under “normal operating conditions” and also under adverse conditions. Armed with this information – the results of the verification process – practitioners can judiciously select the isosurface extraction technique appropriate for their problem of interest, and have confidence in its behavior.
Verification, V&V, Isosurface Extraction, Marching Cubes

L. G. Nonato, C. Scheidegger, R. M. Kirby, T. Etiene and C. Silva, "Verifiable Visualization for Isosurface Extraction," in IEEE Transactions on Visualization & Computer Graphics, vol. 15, no. , pp. 1227-1234, 2009.
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