Dr. Johannes Kehrer

Topics of Research

• Data visualization / interactive visual analysis
• Uncertainty, comparative, and glyph-based visualization
• Visual analysis of multifaceted scientific data, i.e., spatiotemporal, multivariate, multimodal, and multirun/ensemble data

Biography

Johannes Kehrer is a research scientist in visual analytics and explainable artificial intelligence at Siemens Corporate Technology, Munich, and an external lecturer at the Technical University of Munich and the University of Applied Sciences Upper Austria.  He received the BSc degree in Media Technology and Design from the University of Applied Sciences Upper Austria, Hagenberg Campus, in 2005 and the MSc degree in Visual Computing from the Vienna University of Technology in 2007, respectively.  He then worked as a teaching and research assistant in the visualization group at the Department of Informatics, University of Bergen, Norway, and received the PhD degree from there in 2011.  He spent the year 2012 as a researcher at the VRVis Research Center in Vienna and then worked as a postdoctoral researcher at the Institute of Computer Graphics and Algorithms, Vienna University of Technology. From 2014 to 2017, he was a lecturer and postdoctoral researcher at the Computer Graphics and Visualization Group at the Technische Universität München, Germany.

He has co-authored several articles in prestigious journals such as Computer Graphics Forum and IEEE Transactions on Visualization and Computer Graphics. He has cooperated with researchers from diverse areas such as climate research or statistics. Refer to his Curriculum Vitae for further details.

Theses

Interactive Visual Analysis of Multi-faceted Scientific Data
J. Kehrer, PhD thesis, Department of Informatics, University of Bergen, March 2011.

Integrating Interactive Visual Analysis of Large Time Series into the SimVis System
J. Kehrer, Master Thesis, Vienna University of Technology, Oct. 2007.

Journal Articles

Comparative Visual Analysis of Transport Variability in Flow Ensembles
M. Jarema, J. Kehrer, R. Westermann,
J. WSCG, 24(1):25-34, 2016.

Cupid: Cluster-based Exploration of Geometry Generators with Parallel Coordinates and Radial Trees
M. Beham, W. Herzner, M.E. Gröller, and J. Kehrer, 
IEEE Trans. Visualization and Computer Graphics, 20(12):1693-1702, Dec. 2014.

A Model for Structure-based Comparison of Many Categories in Small-Multiple Displays
J. Kehrer, H. Piringer, W. Berger, M.E. Gröller, 
IEEE Trans. Visualization and Computer Graphics, 19(12):2287-2296, Dec. 2013.

Visualization and Visual Analysis of Multi-faceted Scientific Data: A Survey 
J. Kehrer, H. Hauser, 
IEEE Trans. Visualization and Computer Graphics, 19(3):495-513, March 2013.
Spotlight paper of the March journal issue.
3,900 downloads from IEEE Xplore.

Interactive Visual Analysis of Heterogeneous Scientific Data across an Interface
J. Kehrer, P. Muigg, H. Doleisch, H. Hauser,
IEEE Trans. Visualization and Computer Graphics, 17(7):934-946, July 2011.

Brushing Moments in Interactive Visual Analysis 
J. Kehrer, P. Filzmoser, H. Hauser, 
Computer Graphics Forum, 29(3):813-822, June 2010.

Exploration of Climate Data Using Interactive Visualization 
F. Ladstädter, A. Steiner, B. Lackner, B. Pirscher, G. Kirchengast, J. Kehrer, H. Hauser, P. Muigg, H. Doleisch, 
J. Atmospheric & Oceanic Technology, 27(4):667-679, Apr. 2010.

Hypothesis Generation in Climate Research with Interactive Visual Data Exploration
J. Kehrer, F. Ladstädter, P. Muigg, H. Doleisch, A. Steiner, H. Hauser,
IEEE Trans. Visualization and Computer Graphics, 14(6):1579-1586, Nov./Dec. 2008.

A Four-level Focus+Context Approach to Interactive Visual Analysis of Temporal Features in Large Scientific Data 
P. Muigg, J. Kehrer, S. Oeltze, H. Piringer, H. Doleisch, B. Preim, H. Hauser, 
Computer Graphics Forum, 27(3):775-782, May 2008.

Other Publications

Screen-space Silhouettes for Visualizing Ensembles of 3D Isosurfaces
I. Demir, J. Kehrer, R. Westermann,
Proc. IEEE Pacific Visualization Symp. (Visualization Notes), pages 204-208, 2016.

Comparative Visual Analysis of Vector Field Ensembles
M. Jarema, I. Demir, J. Kehrer, R. Westermann,
Proc. IEEE Conference on Visual Analytics Science and Technology (IEEE VAST), pages 81-88, 2015.

Glyph-based Multi-field Visualization
D.H.S. Chung, R.S. Laramee, J. Kehrer, H. Hauser,
Scientific Visualization: Uncertainty, Multifield, Biomedical, and Scalable Visualization, pages 129-137, Springer 2014.

Glyph-based Visualization: Foundations, Design Guidelines, Techniques and Applications
R. Borgo, J. Kehrer, D.H.S. Chung, E. Maguire, R.S. Laramee, H. Hauser, M. Ward, M. Chen,
Eurographics State of the Art Reports, pages 39-63. May 2013.

A Generic Model for the Integration of Interactive Visualization and Statistical Computing Using R
J. Kehrer, R.N. Boubela, P. Filzmoser, H. Piringer,
Proc. IEEE Conf. Visual Analytics Science and Technology (IEEE VAST), pages 233-234. 2012.

Visual Analysis of Multivariate Movement Data Using Interactive Difference Views
O. Daae Lampe, J. Kehrer, H. Hauser,
Proc. Vision, Modeling, and Visualization (VMV 2010), pages 315-322, 2010.

Critical Design and Realization Aspects of Glyph-based 3D Data Visualization
A.E. Lie, J. Kehrer, H. Hauser,
Proc. Spring Conference on Computer Graphics (SCCG 2009), pages 27-34, 2009.

SimVis: An Interactive Visual Field Exploration Tool applied to Climate Research
F. Ladstädter, A. Steiner, B. Lackner, G. Kirchengast, P. Muigg, J. Kehrer, H. Doleisch,
New Horizons in Occultation Research, pages 235-245, Springer, 2009.

Tutorials

IEEE VIS Tutorial on Interactive Visual Analysis of Scientific Data
S. Oeltze, H. Hauser, J. Kehrer.
Tutorial held at IEEE VIS 2013, Atlanta, Georgia, USA. Oct 2013.

Teaching Activities

TU München

Lecture - Scientific Visualization (Winter 2014/15 & 2015/16)

University of Bergen

Lab - Introd. to Programming Methodology (Autumn 2010 & Spring 2011)
Lab - Program Development Methodologies (Spring 2010)
Lab - Computer Graphics (Spring 2008)
Lab - Visualization (Autumn 2008 & 2009)
Lab - Selected Topics in Visualization (Spring 2009)

Vienna University of Technology

Guest lecture - Visualization 2 (Summer 2013 & 2014)
Guest lecture - Information Visualization (Summer 2012, 2013, 2014)
Lab tutor - Introd. to Digital Image Processing (Winter 2006/07)
Lab tutor - Virtual and Augmented Reality (Winter 2006/07)

University of Applied Sciences Upper Austria, Campus Hagenberg

Lab tutor - Applied Software Techniques (Winter 2004/05)
Lab tutor - Object Oriented Programming (Summer 2004)
Lab tutor - Introd. to Programming (Winter 2003/04)

Selected Talks

• Comparative Visual Analysis of Many Related Data Sets (May 2016)
  Invited talk at the Data Science Institute, Lancaster University, UK.
• Interactive Visual Analysis of Ensemble Data (Dec. 2015)
  Invited talk at Otto-von-Guericke-Universität Magdeburg, Germany.
• Ensemble Data Analysis using Composite Visualizations (Oct. 2015)
  Talk at IEEE VIS 2015, Workshop on Visualization for Decision Making Under Uncertainty, Chicago, Illinois, USA.
• Challenges in Ensemble Visualization (Jan. 2015)
  Talk at Workshop on Parameter Space Analysis and Uncertainty, Technische Universität München, Germany
• Interactive Visual Analysis of Complex Scientific Data (Jan. 2014) 
  Invited talk at Technische Universität München, Germany.
• Visual Analysis of Multi-faceted Scientific Data: Challenges and Trends (Oct. 2013) 
  Invited talk at Karlsruhe Institute of Technology, Germany.
• Visual Analysis of Multi-faceted Scientific Data (Feb. 2012) 
  Invited talk at Dagstuhl Seminar on Information Visualization, Visual Data Mining and Machine Learning, Dagstuhl, Germany.
• Selected Opportunities for Integrating Statistics and Visualization in Multi-dimensional Data Exploration (May 2010) 
  Talk at Workshop on Exploratory Data Analysis and Visualization (EDAVis), Vienna, Austria.
• SimVis – eine neue Technologie zur interaktiven visuellen Analyse: Konzepte und Anwendungen im Umfeld der Klimaforschung 
  (Dec. 2009)  Invited talk together with H. Doleisch at Wegener Center for Climate and Global Change, Graz, Austria.
• Interactive Visual Analysis of Multi-run Climate Data (Dec. 2009) 
  Invited talk at the Potsdam Inst. for Climate Impact Research, Germany.
• Interactive Visual Exploration of Climate Data (Aug. 2008)
  Invited talk at ClimaVis 2008, Univ. of Bergen, Norway.