Combined surface and volumetric occlusion shading

Author

Schott, Mathias ; Martin, Tobias ; Grosset, A. V Pascal ; Brownlee, Carson ; Höllt, Thomas ; Brown, Benjamin P. ; Smith, Sean T. ; Hansen, Charles D.

Author_Institution

Univ. of Utah, Salt Lake City, UT, USA

fYear

2012

fDate

Feb. 28 2012-March 2 2012

Firstpage

169

Lastpage

176

Abstract

In this paper, a method for interactive direct volume rendering is proposed that computes ambient occlusion effects for visualizations that combine both volumetric and geometric primitives, specifically tube shaped geometric objects representing streamlines, magnetic field lines or DTI fiber tracts. The proposed algorithm extends the recently proposed Directional Occlusion Shading model to allow the rendering of those geometric shapes in combination with a context providing 3D volume, considering mutual occlusion between structures represented by a volume or geometry.

Keywords

computational geometry; data visualisation; hidden feature removal; interactive systems; rendering (computer graphics); solid modelling; 3D volume; DTI fiber tracts; ambient occlusion effects; directional occlusion shading model; geometric primitives; geometric shapes; interactive direct volume rendering; magnetic field lines; specifically tube shaped geometric objects; streamlines; surface occlusion shading; volumetric occlusion shading; volumetric primitives; Diffusion tensor imaging; Educational institutions; Geometry; Image color analysis; Lighting; Rendering (computer graphics); Transfer functions; I.3.7 [Computer Graphics]: Three-Dimensional Graphics and Realism—Subjects: Color, shading, shadowing;

fLanguage

English

Publisher

ieee

Conference_Titel

Visualization Symposium (PacificVis), 2012 IEEE Pacific

Conference_Location

Songdo

ISSN

2165-8765

Print_ISBN

978-1-4673-0863-2

Electronic_ISBN

2165-8765

Type

conf

DOI

10.1109/PacificVis.2012.6183588

Filename

6183588