Direct Volume Rendering Algorithms

This work addresses the issue of uncertainties introduced
during the process of direct volume rendering (DVR).
Specifically,
different DVR algorithms produce
slightly (some drastically) different images.
We investigate methods for visualizing and *explaining*
these differences.
One of the key tasks is to simulate different DVR algorithms
using a base or common method.
To date, we have some preliminary results using two different
base methods:
ray-based
and
projection-based.
We also demonstrate that the simulation of DVR algorithms with
a common base algorithm is reversible.
That is, if a ray-based algorithm can be simulated with a
projection-based algorith, then a projection-based algorithm
can be simulated by a ray-based algorithm.

Ray-based Data Level Comparisons of Direct Volume Rendering Algorithms

in *Scientific Visualization*, Dagstuhl'97,
edited by Hans Hagen, Gregory Nielson, and Frits Post,
IEEE 1999, pp. 137-150, 347.

A Methodology for Comparing Direct Volume Rendering
Algorithms Using a Projection-Based Data Level Approach

in *Eurographics/IEEE TVCG Symposium on Visualization*,
May 1999, Vienna, Austria, pp. 87-98.

Data Level Comparisons of Surface Classifications and Gradient Filters

to appear in *Volume Graphics* 2001.
Click for
submitted version (2 column, longer)
and/or
Springer-Verlag version (1 column, shorter).

Extended Specifications and Test Data Sets for
Data Level Comparisons of Direct Volume Rendering Algorithms

to appear in *Transactions on Visualization and Computer Graphics* 2001.
Also available as
Technical Report HPL-2000-40R1, Hewlett-Packard
Laboratories, Palo Alto, CA, Mar. 2001.

Ray-based Data Level Comparison of Direct Volume Rendering Algorithms.

Projection-based Data Level Comparison of Direct Volume Rendering Algorithms.

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