Email: kalkofen (at) icg.tugraz.at
Phone: (+43) 316 873 5077

Dr. Denis Kalkofen is an Assistant Professor at the Institute for Computer Graphics and Vision (ICG) at Graz University of Technology. His research is focused on developing visualization, interaction and authoring techniques for Mixed Reality environments. He is especially interested in the combination of computer graphics and computer vision techniques in order to enable comprehensible and easily accessible Mixed Reality experiences. Denis received Dipl.-Ing. (2004) from the University of Magdeburg and Dr. techn. (2009) from Graz University of Technology. Before joining the ICG, he worked at the Virtual Reality Laboratory at the University of Michigan.

Publications

Learning Lightprobes for Mixed Reality Illumination

David Mandl, Kwang Moo Yi, Peter Mohr, Peter Roth, Pascal Fua, Vincent Lepetit, Dieter Schmalstieg, Denis Kalkofen
IEEE International Symposium on Mixed and Augmented Reality (ISMAR), to appear, 2017

Dynamic Label Placement for Forensic Case Visualization

Christof Sirk, Denis Kalkofen, Denis Schmalstieg, Alexander Bornik
EG/VGTC Conference on Visualization (Eurovis), to appear, 2017
Best Short Paper

Retargeting Video Tutorials Showing Tools With Surface Contact to Augmented Reality

Peter Mohr, David Mandl, Markus Tatzgern, Eduardo Veas, Dieter Schmalstieg, Denis Kalkofen
ACM Conference on Human Factors in Computing Systems (CHI), to appear, 2017

Adaptive User-Perspective Rendering

Peter Mohr, Markus Tatzgern, Jens Grubert, Dieter Schmalstieg, Denis Kalkofen
IEEE International Symposium on 3D User Interfaces (3DUI), to appear, 2017

Instant Mixed Reality Lighting from Casual Scanning

Thomas Richter-Trummer, Denis Kalkofen, Jinwoo Park, Dieter Schmalstieg
IEEE International Symposium on Mixed and Augmented Reality (ISMAR'16), pages 27 - 36, 2016

Temporal Coherence Strategies For Augmented Reality Labeling

Jacob Boesen Madsen, Markus Tatzgern, Claus B Madsen, Dieter Schmalstieg, Denis Kalkofen
Transactions on Visualization and Graphics (TVCG - Proceedings of IEEE VR), pages 1415 - 1423, 2016

Adaptive Information Density For Augmented Reality Displays

Markus Tatzgern, Valeria Orso, Denis Kalkofen, Giulio Jacucci, Luciano Gamberini, Dieter Schmalstieg
IEEE Virtual Reality (VR), pages 83, 2016

Retargeting Technical Documentation to Augmented Reality

Peter Mohr, Bernhard Kerbl, Michael Donoser, Dieter Schmalstieg, Denis Kalkofen,
ACM Conference on Human Factors in Computing Systems (CHI), pages 3337-3346, 2015

Interactive Disassembly Planning for Complex Objects

Bernhard Kerbl, Denis Kalkofen, Markus Steinberger, Dieter Schmalstieg,
Computer Graphics Forum (Proceedings of Eurographics), volume 34, issue 2(2015), pages 287–297, 2015

Exploring real world points of interest: Design and evaluation of object-centric exploration techniques for augmented reality

Markus Tatzgern, Raphael Grasset, Eduardo Veas, Denis Kalkofen, Hartmut Seichter, Dieter Schmalstieg,
Pervasive Mobile Computing 18: 55–70, 2015

Design Guidelines for Generating Augmented Reality Instructions.

Cledja Rolim, Dieter Schmalstieg, Denis Kalkofen, Veronica Teichrieb
IEEE International Symposium on Mixed and Augmented Reality (ISMAR), pages 120 - 123, 2015

Hedgehog Labeling: View Management Techniques for External Labels in 3D Space

Markus Tatzgern, Denis Kalkofen, Raphael Grasset, Dieter Schmalstieg,
IEEE Virtual Reality (VR), pages 27-32, 2014

Transitional Augmented Reality Navigation for Live Captured Scenes

Markus Tatzgern, Raphael Grasset, Denis Kalkofen, Dieter Schmalstieg,
IEEE Virtual Reality (VR), pages 21-26, 2014

Adaptive ghosted views for Augmented Reality

Denis Kalkofen, Eduardo Veas, Stefanie Zollmann, Markus Steinberger, Dieter Schmalstieg,
IEEE International Symposium on Mixed, Augmented Reality (ISMAR), pages 1-9, 2013

Exploring Distant Objects with Augmented Reality

Markus Tatzgern, Raphael Grasset, Eduardo Veas, Denis Kalkofen, Hartmut Seichter, Dieter Schmalstieg,
Joint Virtual Reality Conference of EGVE - EuroVR, pages 49-56, 2013

Dynamic compact visualizations for augmented reality.

Markus Tatzgern, Denis Kalkofen, Dieter Schmalstieg,
IEEE Virtual Reality (VR), pages 3-6, 2013

Entourage: Visualizing Relationships between Biological Pathways using Contextual Subsets

Alexander Lex, Christian Partl, Denis Kalkofen, Marc Streit, Samuel Gratzl, Anne Mai Wassermann, Dieter Schmalstieg, Hanspeter Pfister,
IEEE Transactions on Visualization and Computer Graphics (TVCG - Proceedings of InfoVis), pages 2536-2545, 2013

enRoute: Dynamic Path Extraction from Biological Pathway Maps for Exploring Heterogeneous Experimental Datasets.

Christian Partl, Alexander Lex, Marc Streit, Denis Kalkofen, Karl Kashofer, Dieter Schmalstieg,
BMC Bioinformatics, pages S3, 2013

enRoute: Dynamic path extraction from biological pathway maps for in-depth experimental data analysis.

Christian Partl, Alexander Lex, Denis Kalkofen, Karl Kashofer, Marc Streit, Dieter Schmalstieg,
Symposium on Biological Data Visualization (BioVis), pages 107-114, 2012
Best Paper

OmniKinect: Real-time Dense Volumetric Data Acquisition and Applications

Bernhard Kainz, Stefan Hauswiesner, Gerhard Reitmayr, Markus Steinberger, Raphael Grasset, Lukas Gruber, Eduardo Veas, Denis Kalkofen, Hartmut Seichter, Dieter Schmalstieg,
Symposium on Virtual Reality Software, Technology (VRST), pages 25-32, 2012

Image-driven view management for augmented reality browsers

Raphael Grasset, Tobias Langlotz, Denis Kalkofen, Markus Tatzgern, Dieter Schmalstieg,
International Symposium on Mixed, Augmented Reality (ISMAR), pages 177-186, 2012

Interactive 4D overview and detail visualization in augmented reality

Stefanie Zollmann, Denis Kalkofen, Christof Hoppe, Stefan Kluckner, Horst Bischof, Gerhard Reitmayr,
International Symposium on Mixed, Augmented Reality (ISMAR), pages 167-176, 2012

Frame Cache Management for Multi-frame Rate Systems

Stefan Hauswiesner, Philipp Grasmug, Denis Kalkofen, Dieter Schmalstieg,
International Symposium on Visual Computing (ISVC), pages 285-294, 2012

Ray prioritization using stylization and visual saliency

Markus Steinberger, Bernhard Kainz, Stefan Hauswiesner, Rostislav Khlebnikov, Denis Kalkofen, Dieter Schmalstieg,
Computers & Graphics, pages 673-684, 2012

Using Perceptual Features to Prioritize Ray-based Image Generation

Bernhard Kainz, Markus Steinberger, Stefan Hauswiesner, Rostislav Khlebnikov, Denis Kalkofen, Dieter Schmalstieg,
ACM Siggraph Symposium on Interactive 3D Graphics, Games (I3D), 2011

Visualization Techniques for Augmented Reality

Denis Kalkofen, Christian Sandor, Sean White, Dieter Schmalstieg,
Handbook of Augmented Reality, pages 65-98, 2011

Embedded Virtual Views for Augmented Reality Navigation

Markus Tatzgern, Denis Kalkofen, Raphael Grasset, Dieter Schmalstieg,
Workshop on Visualization in Mixed Reality Environments, International Symposium on Mixed, Augmented Reality (ISMAR), 2011

Multi-perspective Compact Explosion Diagrams

Markus Tatzgern, Denis Kalkofen, Dieter Schmalstieg,
Computer & Graphics, pages 135--147, 2011

Compact explosion diagrams

Markus Tatzgern, Denis Kalkofen, Dieter Schmalstieg,
Non-Photorealistic Animation, Rendering (NPAR), pages 17-26, 2010

Color harmonization for Augmented Reality

Lukas Gruber, Denis Kalkofen, Dieter Schmalstieg,
IEEE International Symposium on Mixed, Augmented Reality (ISMAR), pages 227-228, 2010

Image-based ghostings for Single Layer Occlusions in Augmented Reality

Stefanie Zollmann, Denis Kalkofen, Erick Mendez, Gerhard Reitmayr,
IEEE International Symposium on Mixed, Augmented Reality (ISMAR), pages 19-26, 2010

Multi-Frame Rate Volume Rendering

Stefan Hauswiesner, Denis Kalkofen, Dieter Schmalstieg,
Eurographics Symposium on Parallel Graphics, Visualization, pages 19-26, 2010

Augmented Reality for Minimally Invasive Surgery: Overview and Some Recent Advances

Pablo Lamata, Ali Wajid, Alicia Cano, Jordi Cornella, Jerome Declerck, Ole J. Elle, Adinda Freudenthal, Hugo Furtado, Denis Kalkofen, Edvard Naerum, Eigil Samset, Patricia Sánchez-Gonzalez, Francisco M. Sánchez-Margallo, Dieter Schmalstieg, Mauro Sette, Thomas Stüdeli, Jos Vander Sloten, Enrique J. Gómez,
Augmented Reality, Soha Maad (Ed.) ISBN: 978-953-7619-69-5, 2010

Comprehensible Visualization for Augmented Reality

Denis Kalkofen, Erick Mendez, Dieter Schmalstieg,
IEEE Transactions on Visualization and Computer Graphics, pages 193-204, 2009

Explosion Diagrams in Augmented Reality

Denis Kalkofen, Markus Tatzgern, Dieter Schmalstieg,
IEEE Virtual Reality, pages 71-78, 2009

Adaptive Visualization in Outdoor Augmented Reality Displays

Denis Kalkofen, Stefanie Zollmann, Gerhard Schall, Gerhard Reitmayr, Dieter Schmalstieg,
The Going Out Workshop, IEEE International Symposium on Mixed, Augmented Reality (ISMAR), 2009

Visualization tool for improved accuracy in needle placement during percutaneous radio-frequency ablation of liver tumors

Thomas Stüdeli, Denis Kalkofen, Petter Risholm, Ali Wajid, Eigil Samset,
Medical Imaging 2008: Visualization, Image-Guided Procedures,, Modeling, SPIE Vol. 6918, 2008

How do Interventionists Navigate to the Tumour

Thomas Stüdeli, Denis Kalkofen, Adinda Freudenthal,
Nordic Ergonomic Society Conference (NES), 2007

Interactive Focus and Context Visualization for Augmented Reality

Denis Kalkofen, Erick Mendez, Dieter Schmalstieg,
IEEE International Symposium on Mixed, Augmented Reality (ISMAR), pages 191-201, 2007
Best Student Paper

Integrated Medical Workflow for Augmented Reality Applications

Denis Kalkofen, Bernhard Reitinger, Petter Risholm, Alexander Bornik, Reinhard Beichel, Dieter Schmalstieg, Eigil Samset,
MICCAI Workshop on Augmented Environments for Medical Imaging, Computer-Aided Surgery (AMI-ARCS), 2006

Interactive Context-driven Visualization Tools for Augmented Reality

Erick Mendez, Denis Kalkofen, Dieter Schmalstieg,
IEEE International Symposium on Mixed, Augmented Reality (ISMAR), pages 209--218, 2006

Patents

Adaptive resolution in optical flow computations for an image processing system
Philipp Grasmug, Dieter Schmalstieg, Stefan Hauswiesner and Denis Kalkofen
US Patent, Patent number 20150262380, 2015
Hierarchical clustering for view management augmented reality
Markus Tatzgern, Denis Kalkofen, Dieter Schmalstieg, Raphael Grasset
US Patent, Publication number 14/640,981, 2014
Image-driven view management for annotations
Raphael Grasset, Markus Tatzgern, Tobias Langlotz, Denis Kalkofen and Dieter Schmalstieg
WO Patent, Publication number 2013176830, November 2013
Efficient information presentation for augmented reality.
Markus Tatzgern, Denis Kalkofen and Dieter Schmalstieg
WO Patent, Publication number 2012033768, March 2012
Method, system and computer program product for automatically creating an animated 3-D scenario from human position and path data.
Klaus Peter Beier, Denis Kalkofen, Lubomira A Dontcheva, Lars Schumann, Lars Bjorn Jensen
US Patent, Publication number 20030227453, December 2003

Awards

Best Short Paper Award at EuroVis 2017
for the paper Dynamic Label Placement for Forensic Case Visualization, Christof Sirk, Denis Kalkofen, Denis Schmalstieg, Alexander Bornik
Honorable Mention for Best Paper Award at IEEE International Symposium on 3D User Interfaces (3DUI) 2017
for the paper Adaptive User-Perspective Rendering, Peter Mohr, Markus Tatzgern, Jens Grubert, Dieter Schmalstieg, Denis Kalkofen
Recognized Inventor in 2015 at Graz University of Technology
Recognized Inventor in 2013 at Graz University of Technology
Best Paper Award at IEEE BioVis 2012
for the paper enRoute: Dynamic Path Extraction from Biological Pathway Maps for In-Depth Experimental Data Analysis. Christian Partl, Alexander Lex, Denis Kalkofen, Marc Streit, Karl Kashofer and Dieter Schmalstieg
Recognized Inventor in 2011 at Graz University of Technology
Best Student Paper Award at the 6th IEEE International Symposium on Mixed and Augmented Reality (ISMAR) 2007
for the paper Interactive Focus and Context Visualization for Augmented Reality. Denis Kalkofen, Erick Mendez, Dieter Schmalstieg.
Computerworld Honors, 2003 Laureate and Medallist
Medallist and Laureate of Year 2000 Computerworld Smithsonian Awards in Education and Academia