DocumentCode :
105361
Title :
Verifying Volume Rendering Using Discretization Error Analysis
Author :
Etiene, Tiago ; Jonsson, Daniel ; Ropinski, Timo ; Scheidegger, Carlos ; Comba, Joao L. D. ; Nonato, Luis Gustavo ; Kirby, Robert M. ; Ynnerman, Anders ; Silva, Claudio T.
Author_Institution :
Sch. of Comput., Univ. of Utah, Salt Lake City, UT, USA
Volume :
20
Issue :
1
fYear :
2014
fDate :
Jan. 2014
Firstpage :
140
Lastpage :
154
Abstract :
We propose an approach for verification of volume rendering correctness based on an analysis of the volume rendering integral, the basis of most DVR algorithms. With respect to the most common discretization of this continuous model (Riemann summation), we make assumptions about the impact of parameter changes on the rendered results and derive convergence curves describing the expected behavior. Specifically, we progressively refine the number of samples along the ray, the grid size, and the pixel size, and evaluate how the errors observed during refinement compare against the expected approximation errors. We derive the theoretical foundations of our verification approach, explain how to realize it in practice, and discuss its limitations. We also report the errors identified by our approach when applied to two publicly available volume rendering packages.
Keywords :
data visualisation; error analysis; rendering (computer graphics); DVR algorithms; Riemann summation; continuous model; convergence curves; discretization error analysis; expected approximation errors; grid size; pixel size; volume rendering correctness verification approach; volume rendering integral analysis; Error analysis; Rendering (computer graphics); Testing; Volume measurements; Discretization errors; testing; verifiable visualization; verification; volume rendering;
fLanguage :
English
Journal_Title :
Visualization and Computer Graphics, IEEE Transactions on
Publisher :
ieee
ISSN :
1077-2626
Type :
jour
DOI :
10.1109/TVCG.2013.90
Filename :
6532282
Link To Document :
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