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Basic Research Projects in
Visualization @ VRVis
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are sorted ``most recent update first''.
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TimeHistograms for Large, Time-Dependent Data:
Histograms are a very useful tool for getting an overview over complex data,
but they are hard to use with time-dependent data. We propose extensions to
standard 2D and 3D histograms to effectively work with time-dependent data.
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Contact:
Robert Kosara (mailto:Kosara@VRVis.at)
Project duration:
April to November 2003
Last update:
2004-03-01
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High-Quality Two-Level Volume Rendering of Segmented Data Sets on
Consumer Graphics Hardware:
We show how segmented volumetric data sets can be rendered interactively and with high quality on
current consumer graphics hardware. We support per-object transfer functions, per-object rendering modes,
and per-object compositing modes. By integrating an additional global compositing mode we attain a
hiqh-quality GPU volume rendering framework for two-level volume rendering.
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Contact:
Markus Hadwiger (mailto:Hadwiger@VRVis.at)
Project duration:
since winter 2002 (still continued)
Last update:
2003-08-25
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MIP-Mapping With Procedural and Texture-Based Magnification:
When MIP-mapping is used in conjunction with higher-order magnification that is evaluated either
procedurally or via multiple pre-sampled texture maps, the higher-order filter degenerates to
nearest-neighbor interpolation for lower-resolution MIP-map levels. In order to solve this problem,
we propose the concept of a Meta MIP-map.
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Contact:
Markus Hadwiger (mailto:Hadwiger@VRVis.at)
Project duration:
since summer 2002 (still continued)
Last update:
2003-07-23
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Thoughts on User Studies: Why, How, and When:
A paper on user studies, experiences from past studies,
and thoughts on what alternatives there are.
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Contact:
Robert Kosara (mailto:Kosara@VRVis.at)
Project duration:
Summer 2002 - Spring 2003
Last update:
2003-05-12
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Linking Scientific and Information Visualization
with Interactive 3D Scatterplots:
linked 3D scatterplots are presented with advanced interaction
technology for interactive feature specification, in consequence
then also used for focus+context visualization of data from
computational simulation as well as medical 3D data and data
from the InfoVis context.
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Contact:
Robert Kosara (mailto:Kosara@VRVis.at),
Helwig Hauser (mailto:Hauser@VRVis.at)
Project duration:
winter 2001 - winter 2002
Last update:
2003-01-15
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Interactive Feature Specification for Focus+Context
Visualization of Complex Simulation Data:
a new framework is used for flexible and interactive specification of
high-dimensional and/or complex features in data from computational
simulation (implemented in form of an XML-based feature definition
language, called FDL) , which then are used for focus+context visualization of
the data through multiple, linked views (InfoVis as well as SciVis
views).
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Contact:
Helmut Doleisch (mailto:Doleisch@VRVis.at),
Helwig Hauser (mailto:Hauser@VRVis.at)
Project duration:
early 2002 - winter 2002 (still continued)
Last update:
2003-01-15
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Interactive Volume Rendering using PC-based Virtual Reality:
we show how interactive and flexible volume rendering (RTVR, see below)
can be integrated within a PC-based virtual environment. Interaction
techniques such as intuitive clipping, lighting, the change of
transparency, thresholding, etc., are demonstrated.
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Contact:
Helwig Hauser (mailto:Hauser@VRVis.at),
Anton Fuhrmann (mailto:Fuhrmann@VRVis.at)
Project duration:
summer 2001 - spring 2002 (still continued)
Last update:
2002-04-12
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Angular Brushing
for Extended Parallel Coordinates:
a new brushing technique for paralle coordinates
is proposed which allows to brush correlations between
neighboring axes. Furthermore the application of
smooth brushing to parallle coordinates is demonstrated.
Composite brushes as well as several further extensions
are presented as well.
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Contact:
Helwig Hauser (mailto:Hauser@VRVis.at),
Helmut Doleisch (mailto:Doleisch@VRVis.at)
Project duration:
winter 2001 - spring 2002
Last update:
2002-04-12
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Process Visualization
with Levels of Detail:
we demonstrate the application of information visualization techniques
to the field of process visualization. It is shown how a focus+context
visualization is achieved through different levels of detail for virtual
instruments and 3D anchoring plus collision avoidance. Additionally,
further extensions like history coding or multi-instruments are
demonstrated.
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Contact:
Helwig Hauser (mailto:Hauser@VRVis.at)
Project duration:
winter 2000 - spring 2002
Last update:
2002-04-12
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High-quality filtering
on PC graphics hardware:
by using a multipass rendering algorithm exploiting the
multi-texturing capabilities of current PC graphics hardware,
high-quality (e.g., cubic) filtering can be achieved, even
though the hardware itself only supports linear interpolation.
This method offers wide applicability, ranging from reconstruction
of 2D and 3D functions (e.g., filtering solid textures) to
gradient reconstruction and image processing.
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Contact:
Markus Hadwiger (mailto:Hadwiger@VRVis.at),
Helwig Hauser (mailto:Hauser@VRVis.at)
Project duration:
since winter 2000 (still continued)
Last update:
2001-11-26
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Smooth Brushing for Focus+Context Visualization
of Simulation Data in 3D:
visualization is crucial for analysis of results
from scientific visualization. Brushing is a well-known
approach from information visualization for specifying
those parts of the data which are of special interest.
We present smooth brushing in InfoViz views
for 3D simulation data to obtain a Focus+Context visualization
of the 3D data-set.
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Contact:
Helmut Doleisch (mailto:Doleisch@VRVis.at),
Helwig Hauser (mailto:Hauser@VRVis.at)
Project duration:
winter 2000 - winter 2001
Last update:
2001-11-08
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Cell-Based First-Hit Ray Casting:
a new technique for fast perspective volume visualization
based on first-hit ray casting and a number of advanced
optimization tricks, including data traversal in macro-blocks,
early scanline termination, etc.
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Contact:
Helwig Hauser (mailto:Hauser@VRVis.at),
Lukas Mroz (mailto:Mroz@VRVis.at)
Project duration:
early 2001 - autumn 2001
Last update:
2001-11-08
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RTVR - a Flexible Java Library for
Interactive Volume Rendering: interactive surface and
volume rendering, object aware rendering parameter and transfer
function assignment, object-wise rendering mode setting (MIP/DVR),
object aware clipping, interactive shading and non-photorealistic
rendering. Everything in pure Java within the browser.
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Contact:
Helwig Hauser (mailto:Hauser@VRVis.at),
Lukas Mroz (mailto:Mroz@VRVis.at)
Project duration:
summer 2000 - mid-2001 (still continued)
Last update:
2001-03-30
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Two-level volume rendering (2lVR):
by selectively using individual rendering techniques
for different objects within a 3D data-set, we are able
not only to clearly visualize 3D objects, but also to
support focus-plus-context style of applications.
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Contact:
Helwig Hauser (mailto:Hauser@VRVis.at),
Lukas Mroz (mailto:Hauser@VRVis.at)
Project duration:
early 2000 - mid-2001
Last update:
2001-03-28
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Fast Visualization of Object Contours
by Non-Photorealistic Volume Rendering:
the ability to efficiently integrate non-photorealistic
volume rendering techniques within standard visualization
tools allows to obtain extended views onto the given data.
Our non-photorealistic volume rendering method is based on
gradient information within the data. Object contours are
enhanced, and thereby the perception of the spatial form
of objects within the volumetric data is improved.
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Contact:
Helwig Hauser (mailto:Hauser@VRVis.at),
Lukas Mroz (mailto:Mroz@VRVis.at),
Csébfalvi Balázs (mailto:csebfalvi@cg.tuwien.ac.at)
Project duration:
summer 2000 - early 2001
Last update:
2001-02-22
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Semantic Depth of Field (SDOF):
by selectively applying Depth-of-Field effects (blur) to
objects within a scene, in dependance of their importance
with regard to a user-specified relevance function,
humans' ability to quickly recognize sharp objects in a
blurred context can be expoited to fast and easily
point the users attention to the most important objects
within a scene.
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Contact:
Robert Kosara (mailto:rkosara@acm.org),
Helwig Hauser (mailto:Hauser@VRVis.at)
Project duration:
autumn 2000 - early 2001
Last update:
2001-02-14
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Space-Efficient Boundary
Representation of Volumetric Objects:
in this paper we present a compression technique for efficiently
representing boundary objects from volumetric data-sets.
Exploiting spatial coherency within object contours, we are able
to reduce the size of the volumetric boundary down to the
size of just a few images. Allowing for direct volume rendering
of the down-scaled data in addition to compression ratios up
to 250:1, interactive volume visualization becomes possible,
even over the Internet and on a low-end PC.
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Contact:
Helwig Hauser (mailto:Hauser@VRVis.at),
Lukas Mroz (mailto:Mroz@VRVis.at)
Project duration:
June-December 2000
Last update:
2001-02-01
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This page
is maintained by Helwig Hauser.
In case of questions, comments, etc., please
mailto:Hauser@VRVis.at.
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