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2015 IEEE Pacific Visualization Symposium (PacificVis) (2015)
Hangzhou, China
April 14, 2015 to April 17, 2015
ISBN: 978-1-4673-6879-7
pp: 147-151
Anne Berres , TU Kaiserslautern, Germany
Harald Obermaier , UC Davis, USA
Ken Joy , UC Davis, USA
Hans Hagen , TU Kaiserslautern, Germany
ABSTRACT
Time surfaces are a versatile tool to visualise advection and deformation in flow fields. Due to complex flow behaviours involving stretching, shearing, and folding, straightforward mesh-based representations of these surfaces can develop artefacts and degenerate quickly. Common counter-measures rely on refinement and adaptive insertion of new particles which lead to an unpredictable increase in memory requirements. We propose a novel time surface extraction technique that keeps the number of required flow particles constant, while providing a high level of fidelity and enabling straightforward load balancing. Our solution implements a 2D particle relaxation procedure that makes use of local surface metric tensors to model surface deformations. We combine this with an accurate bicubic surface representation to provide an artefact-free surface visualisation. We demonstrate and evaluate benefits of the proposed method with respect to surface accuracy and computational efficiency.
INDEX TERMS
Tensile stress, Measurement, Three-dimensional displays, Surface reconstruction, Face
CITATION
Anne Berres, Harald Obermaier, Ken Joy, Hans Hagen, "Adaptive particle relaxation for time surfaces", 2015 IEEE Pacific Visualization Symposium (PacificVis), vol. 00, no. , pp. 147-151, 2015, doi:10.1109/PACIFICVIS.2015.7156371
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