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Direct Volume Rendering of Curvilinear VolumesDirect volume rendering can visualize sampled 3D scalar data as a continuous medium, or extract features. However, it is generally slow. Furthermore, most algorithms for direct volume rendering have assumed rectilinear gridded data. This paper discusses methods for using direct volume rendering when the original volume is curvilinear, i.e. is divided into six-sided cells which are not necessarily equilateral hexahedra. One approach is to ray-cast such volumes directly. An alternative approach is to interpolate the sample volumes to a rectilinear grid, and use this regular volume for rendering. Advantages and disadvantages of the two approaches in terms of speed and image quality are explored.
Document ID
20020052257
Acquisition Source
Ames Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Vaziri, Arsi
(NASA Ames Research Center Moffett Field, CA United States)
Wilhelms, J.
(NASA Ames Research Center Moffett Field, CA United States)
Challinger, J.
(NASA Ames Research Center Moffett Field, CA United States)
Alper, N.
(NASA Ames Research Center Moffett Field, CA United States)
Ramamoorthy, S.
(NASA Ames Research Center Moffett Field, CA United States)
Kutler, Paul
Date Acquired
August 20, 2013
Publication Date
January 1, 1998
Subject Category
Numerical Analysis
Report/Patent Number
RNR-90-016
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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