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This is the last update on this site!
Since 2003, i am working for the Imaging & Visualization department at Siemens Corporate Research, Inc. in Princeton, NJ USA.
To get my new email address contact me here: email@example.com
OpenQVis released on Sourceforge!
OpenQVis is a GPL project for the visualization of 3D volume data on
rectilinear grids, as they arise from tomographic measurement and simulation
in computational science and engineering. It uses QT and OpenInventor/Coin3D
to achieve cross-platform compability. OpenQVis is available for
Linux, Windows 98/ME, Windows NT/2000/XP and SGI IRIX. It has been
successfully compiled on HPUX. I am currently working on a MacOSX 10.2
The powerpoint slides from the Eurographics
S2 Interactive High-Quality Volume Graphics with Flexible Consumer Graphics
Hardware are now available for download (21MB)|
You can also download my slides from the
full-day-tutorial T4 Programmable
Graphics Hardware for Interactive Visualization (11.5MB).
My PhD. thesis (Dissertation) is now available for download:|
Strategien und Algorithmen zur interaktiven Volumenvisualisierung in Digitalen Dokumenten (PDF, 8.6 MB)
The EG2002 STAR (state-of-the-art-report) is now available for download:|
Interactive High-Quality Volume Rendering with Flexible Consumer Graphics Hardware (PDF, 8.2 MB)
corrected version !!!
Two new animation of convection flow in the earth's crust.
Animation1: 174 KB, MPG
Animation1: 2,1 MB, Cinepak
Animation1: 1,2 MB, Divx
Animation2: 678 KB, MPG
Animation2: 4,3 MB, Cinepak
Animation2: 788 KB, Divx
Here is a gallery of my PhD. graduation,
which finally happend on May 31st ...
Added some new unsorted images to this gallery ...
Image: Shaded pre-integrated volume rendering of a carp.
Interactive volume visualization on a Compaq
Yes, it works !!!
Watch out for the paper at VisSym
by Simon Stegmaier, Marcelo Magallon and Thomas Ertl
"A Generic Solution for Hardware-Accelerated remote Visualization"
There will be a Eurographics
2002 STAR (state-of-the-art report)
"Interactive High-Quality Volume Rendering with Flexible Consumer Graphics
STAR homepage at
|image courtesy of JMK
There will be a Siggraph 2002
"High-Quality Volume Graphics on Consumer PC Hardware"
Joe Michael Kniss
Scientific Computing and Imaging,
School of Computing University of Utah
Computer Graphics Group,
Computer Science Department,
University of Erlangen-Nuremberg,
VRVis Research Center for Virtual Reality and Visualization,
Siggraph course page at
Course homepage at
|Updated Pre-Integrated Volume Renderer to
Version 2.1. The renderer now also supports ATi's Radeon8500 graphics card
by employing the fragment shader OpenGL extension. On GeForce3-based cards
the texture shader and register combiner extensions are used.
Download the new version from the
Volume Renderer Homepage
|A new talk with the title "Using Flexible
Rasterization Hardware for Interactive High-Quality Volume Rendering" is
now online. The talk was given on 8th of November on the Graphiktag 2001
in Tuebingen. Download the talk via this
link (Powerpoint Slides 13.6 MB).
Optional Movie Files:
|Our paper "High-Quality Pre-Integrated Volume
Rendering Using Hardware-Accelerated Pixel Shading" has won the "best paper
award" on the Siggraph/Eurographics
Workshop on Graphics Hardware 2001. The talk is now available for download
|We have developed a novel texture-based volume
rendering approach that achieves the image quality of the best post-shading
approaches with far less slices, called Pre-Integrated Volume Rendering.
Find details here.
|A small gallery of our Chicago visit is now
online. It shows Bernd Tomandl, Freja, me and several other strange
persons on RSNA2000 and our following vacation trip through the middle
|K.Engel, F.Oellien, W.D.Ihlenfeldt, T.Ertl
Client-Server-Strategien zur Visualisierung komplexer Struktureigenschaften
in digitalen Dokumenten der Chemie (PDF)
IT+TI 6/2000 Informationstechnik und Technische Informatik
|Dr. Bernd Tomandl and me at booth #9305 on
2000 in Chicago. We showed high-quality direct volume rendering on low-cost
desktop PCs using remote
visualization and local GForce-based
rendering. The remote rendering was done using a SGI
Octane MXE located in Stuttgart/Germany.
|This time-dependent data is a numerical simulation
of convection flow in the earth's crust. Data courtesy of Dr.
Joerg Schmalzl, Institute of
Geophysics, Muenster University.
- Download (14,6 MB)and unzip into
the multi-texture demo directory.
- Then run shell script runme_bob.sh (Linux) or runme_bob.bat (Windows)
- Press "Play" button
Warning: requires a lot of main memory (at least
256 MB recommended)
Hint: Try Isosurface mode for nice effects.
|We'll be giving a talk and exhibition on this
years RSNA conference in Chicago (26.
Nov. 2000 - 01 Dec. 2000). These are the posters that we show at the exhibition
at space no. 9305. We will also give live demos on remote and GForce-based
|New versions of NVidia multitexture demo for
Linux and Win95/98/ME/NT/2000:
System Requirements: NVidia GForce 256, GTS,
MX, ULTRA Graphics Adapter
Version 1.5 for Win9x/ME/NT/2000
Version 1.5 for Linux/XFree4.x/0.9.x
included: world famous CT teddy scan.
for additional data sets see below ...
- Added support for USHORT and FLOAT datasets
- Added translation mode using middle mouse button
- Changed perspective
Additional data sets:
Bonsai scan with contrast dye (dl 3.9 MB)
human head CT scan, small (dl 200 KB)
human head CT scan large (dl 1.4 MB)
Engine block (dl 3.1 MB)
Human Head MR scan (dl 13.5 MB)
Human Head MR scan, small (dl 7.3 MB)
Teddy bear (dl 635 KB)