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Abstract
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In volume rendering it is very difficult to simultaneously visualize interior
and exterior structures while preserving clear shape cues. Very transparent
transfer functions produce cluttered images with many overlapping structures,
while clipping techniques completely remove possibly important context
information. In this paper we present a new model for volume rendering,
inspired by techniques from illustration that provides a means of interactively
inspecting the interior of a volumetric data set in a feature-driven way which
retains context information. The context-preserving volume rendering model uses
a function of shading intensity, gradient magnitude, distance to the eye point,
and previously accumulated opacity to selectively reduce the opacity in less
important data regions. It is controlled by two user-specified parameters. This
new method represents an alternative to conventional clipping techniques,
shares their easy and intuitive user control, but does not suffer from the
drawback of missing context information.
Keywords: volume rendering, focus+context techniques, non-photorealistic techniques
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Download full paper
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Stefan Bruckner, Sören Grimm, Armin Kanitsar, Meister Eduard Gröller,
"Illustrative Context-Preserving Volume Rendering", in Proceedings of
EuroVis 2005, pp. 69-76.
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[PDF]
Full paper (4.0 MB)
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Supplementary videos
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Video 1:
Comparing context-preserving volume rendering to conventional direct volume
rendering, gradient-magnitude opacity modulation, and direct volume rendering
using a clipping plane. The same transfer function is used for all four
methods.
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[AVI] High quality / Intel Indeo Video 4.5
codec (16.4 MB)
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[AVI] Small filesize / DivX 5.2.1 codec
(0.85 MB)
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Video 2:
Context-preserving volume rendering of a human hand CT data set.
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[AVI] High quality / Intel Indeo Video 4.5
codec (42.3 MB)
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[AVI] Small filesize / DivX 5.2.1 codec
(2.37 MB)
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Video 3:
Context-preserving volume rendering of the visible human male CT data set.
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[AVI] High quality / Intel Indeo Video
4.5 codec (64.7 MB)
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[AVI] Small filesize / DivX 5.2.1
codec (3.50 MB)
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Video 4:
Context-preserving volume rendering of a human head CT data set using a
modulation function for the model parameters which makes the bone impenetrable.
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[AVI] High quality / Intel Indeo Video
4.5 codec (32.1 MB)
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[AVI] Small filesize / DivX 5.2.1
codec (3.23 MB)
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BibTeX Entry
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@inproceedings{bruckner-2005-ICV,
title = "Illustrative Context-Preserving Volume Rendering",
author = "Stefan Bruckner and S{\"o}ren Grimm and Armin Kanitsar and
Meister Eduard Gr{\"o}ller",
year = "2005",
abstract = "In volume rendering it is very difficult to simultaneously
visualize interior and exterior structures while preserving
clear shape cues. Very transparent transfer functions
produce cluttered images with many overlapping structures,
while clipping techniques completely remove possibly
important context information. In this paper we present a
new model for volume rendering, inspired by techniques from
illustration that provides a means of interactively
inspecting the interior of a volumetric data set in a
feature-driven way which retains context information. The
context-preserving volume rendering model uses a function of
shading intensity, gradient magnitude, distance to the eye
point, and previously accumulated opacity to selectively
reduce the opacity in less important data regions. It is
controlled by two user-specified parameters. This new method
represents an alternative to conventional clipping
techniques, shares their easy and intuitive user control,
but does not suffer from the drawback of missing context
information. ",
pages = "69--76",
month = "may",
booktitle = "Proceedings of EuroVis 2005",
keywords = "volume rendering, non-photorealistic techniques,
focus+context techniques",
URL = "http://www.cg.tuwien.ac.at/research/publications/2005/bruckner-2005-ICV/",
}
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