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Volume Ray Casting with Peak Finding and Differential Sampling

Knoll, Aaron and Hijazi, Younis and Westerteiger, Rolf and Schott, Matthias and Hansen, Charles and Hagen, Hans (2009) Volume Ray Casting with Peak Finding and Differential Sampling. In: IEEE Transactions on Visualization and Computer Graphics, 15 (6), pp. 1571-1578. IEEE Computer Society. IEEE Visualization 2009, 11. Okt - 16.Okt 2009, Atlantic City, USA. ISSN 1077-2626

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Official URL: http://doi.ieeecomputersociety.org/10.1109/TVCG.2009.204

Abstract

Direct volume rendering and isosurfacing are ubiquitous rendering techniques in scientific visualization, commonly employed in imaging 3D data from simulation and scan sources. Conventionally, these methods have been treated as separate modalities, necessitating different sampling strategies and rendering algorithms. In reality, an isosurface is a special case of a transfer function, namely a Dirac impulse at a given isovalue. However, ar tifact-free rendering of discrete isosurfaces in a volume rendering framework is an elusive goal, requiring either infinite sampling or smoothing of the transfer function. While preintegration approaches solve the most obvious deficiencies in handling shar p transfer functions, ar tifacts can still result, limiting classification. In this paper, we introduce a method for rendering such features by explicitly solving for isovalues within the volume rendering integral. In addition, we present a sampling strategy inspired by ray differentials that automatically matches the frequency of the image plane, resulting in fewer ar tifacts near the eye and better overall performance. These techniques exhibit clear advantages over standard uniform ray casting with and without preintegration, and allow for high-quality interactive volume rendering with shar p C0 transfer functions.

Document Type:Conference or Workshop Item (Paper)
Title:Volume Ray Casting with Peak Finding and Differential Sampling
Authors:
AuthorsInstitution or Email of Authors
Knoll, AaronTU Kaiserslautern
Hijazi, YounisTU Kaiserslautern
Westerteiger, RolfTU Kaiserslautern
Schott, MatthiasSCI Institute, University of Utah
Hansen, CharlesSCI Institute, University of Utah
Hagen, HansTU Kaiserslautern
Date:2009
Journal or Publication Title:IEEE Transactions on Visualization and Computer Graphics
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:15
Page Range:pp. 1571-1578
Publisher:IEEE Computer Society
ISSN:1077-2626
Status:Published
Keywords:Ray Casting, Volume Rendering
Event Title:IEEE Visualization 2009
Event Location:Atlantic City, USA
Event Type:international Conference
Event Dates:11. Okt - 16.Okt 2009
Organizer:IEEE
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:no assignement
DLR - Program:no assignment
DLR - Research theme (Project):other
Location: Köln-Porz , Braunschweig
Institutes and Institutions:Institut of Simulation and Software Technology
Deposited By: Rolf Westerteiger
Deposited On:14 Jan 2010 08:37
Last Modified:14 Jan 2010 08:37

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