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Interactive isosurfaces with quadratic C1 splines on truncated octahedral partitions
|Wong, P.C. ; Society for Imaging Science and Technology -IS&T-; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:|
Visualization and Data Analysis 2011
Bellingham, WA: SPIE, 2011 (SPIE Proceedings 7868)
Paper 786808, 8 S.
|Conference on Visualization and Data Analysis (VDA) <11, 2011, San Francisco/Calif.>|
|Fraunhofer IGD ()|
| volume data; GPU ray casting; Isosurfaces; Forschungsgruppe Capturing Reality (CARE)|
The reconstruction of a continuous function from discrete data is a basic task in many applications such as the visualization of 3D volumetric data sets. We use a local approximation method for quadratic C1 splines on uniform tetrahedral partitions to achieve a globally smooth function. The spline is based on a truncated octahedral partition of the volumetric domain, where each truncated octahedron is further split into a fixed number of disjunct tetrahedra. The Bernstein-Bézier coefficients of the piecewise polynomials are directly determined by appropriate combinations of the data values in a local neighborhood. As previously shown, the splines provide an approximation order two for smooth functions as well as their derivatives. We present the first visualizations using these splines and show that they are well-suited for GPU-based, interactive high-quality visualization of isosurfaces from discrete data.