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Green Image
Issue No. 04 - July/August (2010 vol. 16)
ISSN: 1077-2626
pp: 571-582
Roy van Pelt , Eindhoven University of Technology, Eindhoven
Anna Vilanova , Eindhoven University of Technology, Eindhoven
Huub van de Wetering , Eindhoven University of Technology, Eindhoven
Illustrative techniques are generally applied to produce stylized renderings. Various illustrative styles have been applied to volumetric data sets, producing clearer images and effectively conveying visual information. We adopt particle systems to produce user-configurable stylized renderings from the volume data, imitating traditional pen-and-ink drawings. In the following, we present an interactive GPU-based illustrative volume rendering framework, called VolFliesGPU. In this framework, isosurfaces are sampled by evenly distributed particle sets, delineating surface shape by illustrative styles. The appearance of these styles is based on locally-measured surface properties. For instance, hatches convey surface shape by orientation and shape characteristics are enhanced by color, mapped using a curvature-based transfer function. Hidden-surfaces are generally removed to avoid visual clutter, after that a combination of styles is applied per isosurface. Multiple surfaces and styles can be explored interactively, exploiting parallelism in both graphics hardware and particle systems. We achieve real-time interaction and prompt parametrization of the illustrative styles, using an intuitive GPGPU paradigm that delivers the computational power to drive our particle system and visualization algorithms.
Volume visualization, illustrative rendering, particle systems, consumer graphics hardware, parallel processing.

A. Vilanova, H. v. Wetering and R. van Pelt, "Illustrative Volume Visualization Using GPU-Based Particle Systems," in IEEE Transactions on Visualization & Computer Graphics, vol. 16, no. , pp. 571-582, 2010.
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