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max planck institut
informatik
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Ritschel, Tobias

Dr.-Ing. Tobias Ritschel

Max-Planck-Institut für Informatik
Department 4: Computer Graphics
Building 46.1
Campus E1 4
66123 Saarbrücken
Germany

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Research Interests

Interactive Global Illumination
How can graphics hardware (GPUs) be used to reproduce advanced visual phenomena such as soft shadows, indirect shadows, soft reflections, caustics or volumetric light in a perceptually plausible way?
Perceptual Graphics
How are colors, shapes, or spatial layout perceived by a human observer? How can this understanding be used to predict and consequently improve the way a humans and machines interact?
Non-physical Graphics
While physical laws define how to do render shadows or reflections "right", how to properly project a 3D scene onto a 2D image or how to deform a shape in a physical way, they sometimes are to restrictive. How can we go beyond physical laws in an appropriate way, such that a machine offers new expressive posibilities to an artist?
Data-driven Graphics
Given the vast amount of information in user-generated content online, how can classic computer graphics techniques such as rendering or shape modelling benefit from them and for which new application will they allow?


Teaching

SS 2015 Lecture Ritschel Interactive Graphics using OpenGL
Lecture Slusallek/Myszkowski Realistic Image Synthesis, (13th and 16th of July)
WS 2014 Lecture Myszkowski/Ritschel/Didyk Perception for Computer Graphics
Praktikum Ritschel 3D-Rekonstruktion "Alte Schmelz", St. Ingbert
SS 2014 Seminar Ritschel Interactive Global Illumination
WS 2013 Seminar Ritschel Creative Computing
Lecture Vangorp/Myszkowski/Ritschel Perception for Computer Graphics
Praktikum Ritschel 3D-Rekonstruktion "Alte Schmelz", St. Ingbert ("aktueller bericht", SR Fernsehen, 15.04.2014.)
WS 2012 Seminar Ritschel/Reinhard/Myszkowski Applied Perception
Seminar Ihrke/Ritschel/Fritz Parallel Visual Computing
SS 2012 Seminar Thormählen/Ritschel Visual Computing Techniques for Efficient Content Production (Saarland University)
Lecture Slusallek/Myszkowski Realistic Image Synthesis, (11th and 16th of July)


Group Members

Bernhard ReinertPhD student (Constraint-based Interaction with 2D and 3D Media)
Oliver NalbachPhD student (Interactive Global Illumination)
Thomas LeimkühlerPhD student
Łukasz DąbałaVisiting Phd student
Jozef HladkyIntern
Fabian RoschyHiWi
Marc HabermannHiWi
Tobias BertelHiWi, Master student
Elena ArabadzhiyskaHiWi, Master student
Dushyant MehtaHiWi
Adam HankaMaster student
Fanyu YeHiWi
Benjamin SommerHiWi


Selected Publications


2015
Data-driven Color Manifolds
Chuong H. Nguyen, Tobias Ritschel, Hans-Peter Seidel
ACM Trans. Graph. 34(2) (Presented at SIGGRAPH 2015, August, 9–3 2015, Los Angeles/USA)
PDF Project Page
Guiding Image Manipulations using Shape-appearance Subspaces from Co-alignment of Image Collections
Chuong H. Nguyen, Oliver Nalbach, Tobias Ritschel, Hans-Peter Seidel
Comp. Graph. Forum 34(2) (Proc. Eurographics 2015, Zürich / Switzerland, May 4–8 2015)
PDF Project Page
Purkinje Images: Conveying Different Content for Different Luminance Adaptations in a Single Image
Sami Arpa, Tobias Ritschel, Karol Myszkowski, Tolga Çapın, Hans-Peter Seidel
Comp. Graph. Forum 34(1) 2015
PDF Project Page
Projective Blue-Noise Sampling
Bernhard Reinert, Tobias Ritschel, Hans-Peter Seidel, Iliyan Georgiev
Comp. Graph. Forum 34(?) 2015
PDF Project Page
Modeling Luminance Perception at Absolute Threshold
Petr Kellnhofer, Tobias Ritschel, Karol Myszkowski, Elmar Eisemann, Hans-Peter Seidel
Comp. Graph. Forum 34(4) (Proc. EGSR 2015, Darmstadt/Germany, 24–26 June 2015), 2015.
PDF Project Page
What makes 2D-to-3D stereo conversion perceptually plausible?
Petr Kellnhofer, Thomas Leimkühler, Tobias Ritschel, Karol Myszkowski, Hans-Peter Seidel
Proc. ACM Symposium on Applied Perception (Tübingen/Germany, 13–14 September 2015), 2015. (Best Talk Award)
PDF Project Page
The Bounced Z-buffer for Indirect Visibility
Oliver Nalbach, Tobias Ritschel, Hans-Peter Seidel
Proc. Vision, Modeling and Visualization (VMV), Aachen/Germany, 7–9 October 2015), 2015.
PDF Project Page
3D Object Class Detection in the Wild
Bojan Pepik, Michael Stark, Petere Gehler, Tobias Ritschel, Bernt Schiele
Proc. 3D from a Single Image (CVPR Workshop), Boston/MA, 7–12 June 2015), 2015.
PDF
What is Holding Back Convnets for Detection?
Bojan Pepik, Rodrigo Benenson, Tobias Ritschel, Bernt Schiele
Proc. German Conference on Pattern Recognition (GCPR 2015), Aachen/Germany, 7–9 October 2015), 2015.
PDF
A Transformation-Aware Image Metric
Petr Kellnhofer, Tobias Ritschel, Karol Myszkowski, Hans-Peter Seidel
IS&T/SPIE Electronic Imaging 2015 (Human Vision and Electronic Imaging XX, San Francisco/CA/USA, 8–12 February 2015), 2015.
PDF Project Page

2014
Image-based Synthesis and Re-Synthesis of Viewpoints Guided by 3D Models
Konstantinos Rematas, Tobias Ritschel, Mario Fritz, Tinne Tuytelaars
Proc. CVPR (Columbus, OH, June 24–27, 2014) (Oral)
PDF Project Page
On-line Learning of Parametric Mixture Models for Light Transport Simulation
Jiří Vorba, Ondřej Karlík, Martin Šik, Tobias Ritschel, Jaroslav Křivánek
ACM Trans. Graph. (Proc. SIGGRAPH, Vancouver / Canada. August 10–14, 2014)
PDF Project Page
Manipulating refractive and reflective binocular disparity
Łukasz Dąbała, Petr Kellnhofer, Tobias Ritschel, Piotr Didyk, Krzysztof Templin, Karol Myszkowski, Przemysław Rokita, Hans-Peter Seidel
Computer Graphics Forum 33(2) (Proc. Eurographics 2014, Strasbourg / France, April, 7–11 2014), 2014.)
PDF Project Page
Stereo day-for-night: retargeting disparity for scotopic vision
Petr Kellnhofer, Tobias Ritschel, Peter Vangorp, Karol Myszkowski, Hans-Peter Seidel
ACM Trans. Applied Perception 10(3) (Special Issue: Proc. Symposium on Applied Perception 2014, Vancouver / Canada, August 8–9) 2014)
PDF Project Page
Spectral Ray Differentials
Oskar Elek, Pablo Bauszat, Tobias Ritschel, Marcus Magnor, Hans-Peter Seidel
Computer Graphics Forum 33(4) (Proc. EGSR 2014, Lyon / France, June, 25–27 2014), 2014.) (Best Student Paper)
PDF Project Page
Deep Screen Space
Oliver Nalbach, Tobias Ritschel, Hans-Peter Seidel
Proc. ACM I3D 2014 (San Francisco / CA, March 14–16 2014), 2014.)
PDF Project Page
Interactive Light Scattering with Principal-Ordinate Propagation
Oskar Elek, Tobias Ritschel, Carsten Dachsbacher, Hans-Peter Seidel
Proc. Graphics Interface (Motreal / Canada, May 7–9 2014) (Michael A. J. Sweeney Award 2014: Best Graphics Paper)
PDF Project Page
Deep Screen Space for Indirect Lighting of Volumes
Oliver Nalbach, Tobias Ritschel, Hans-Peter Seidel
Proc. VMV (Darmstadt / Germany. Octobre 8–10 2014)
Real-time Reflective and Refractive Novel-view Synthesis
Gerrit Lochmann, Bernhard Reinert, Tobias Ritschel, Stefan Müller, Hans-Peter Seidel
Proc. VMV (Darmstadt / Germany. Octobre 8–10 2014)
Progressive Spectral Ray Differentials
Oskar Elek, Pablo Bauszat, Tobias Ritschel, Marcus Magnor, Hans-Peter Seidel
Proc. VMV (Darmstadt / Germany. Octobre 8–10 2014)
Interactive Appearance Editing in RGB-D Images
Stephan Bergman, Tobias Ritschel, Carsten Dachsbacher
Proc. VMV (Darmstadt / Germany. Octobre 8–10 2014)
Improving Perception of Binocular Stereo Motion on 3D Display Devices
Petr Kellnhofer, Tobias Ritschel, Karol Myszkowski, Hans-Peter Seidel
IS&T/SPIE Electronic Imaging 2014 (Stereoscopic Displays and Applications XXV, San Francisco/CA/USA, 3-6 February 2014), 2014.

2013
Interactive By-example Design of Artistic Packing Layouts
Bernhard Reinert, Tobias Ritschel, Hans-Peter Seidel
ACM Trans. Graph 32(5) (Proc. SIGGRAPH Asia / Hong Kong, 19–22 November 2013)

PDF Project Page
Optimizing Disparity for Motion in Depth
Petr Kellnhofer, Tobias Ritschel, Karol Myszkowski, Hans-Peter Seidel
Comp. Graph Forum 32(4) (Proc. EGSR, Zaragoza / Spain, 12–21 June 2013)
PDF Project Page
Material Editing in Complex Scenes by Surface Light Field Manipulation and Reflectance Optimization
Chuong Nguyen, Daniel Scherzer, Tobias Ritschel, Hans-Peter Seidel
Comp. Graph Forum 32(2) (Proc. Eurographics, Girona / Spain, 6–10 May 2013)
PDF Project Page
Real-Time Screen-Space Scattering in Homogeneous Environments
Oskar Elek, Tobias Ritschel, Hans-Peter Seidel
IEEE Comp. Graph. & Applications 33(3) (Special Issue "Scattering: Acquisition, Modeling, and Rendering")
PDF

2012
Highlight Microdisparity for Improved Gloss Depiction
Krzysztof Templin, Piotr Didyk, Tobias Ritschel, Karol Myszkowski, Hans-Peter Seidel
ACM Trans. Graph 31(4) (Proc. SIGGRAPH 2012, Los Angeles)
PDF Project Page
Material Memex: Automatic Material Suggestions for 3D Objects
Arjun Jain, Thorsten Thormälen, Tobias Ritschel, Hans-Peter Seidel
ACM Trans. Graph 31(5) (Proc. SIGGRAPH Asia 2012, Singapore)
PDF Project page
A Luminance-Contrast-Aware Disparity Model and Applications
Piotr Didyk, Tobias Ritschel, Elmar Eisemann, Karol Myszkowski, Hans-Peter Seidel, Wojciech Matusik
ACM Trans. Graph 31(5) (Proc. SIGGRAPH Asia 2012, Singapore)
PDF Project page
State of the Art in Interactive Global Illumination
Tobias Ritschel, Thorsten Grosch, Carsten Dachsbacher, Jan Kautz
Comp. Graph. Forum. 31(1)
PDF BibTeX
A Computational Model of Afterimages
Tobias Ritschel, Elmar Eisemann
Comp. Graph. Forum 31(2) (Proc. Eurographics 2012, Cagliari / Italy, 13–18 May).
PDF Project Page
Exploring Shape Variations by 3D-Model Decomposition and Part-based Recombination
Arjun Jain, Thorsten Thormählen, Tobias Ritschel, Hans-Peter Seidel
Comp. Graph. Forum 31(2) (Proc. Eurographics 2012, Cagliari / Italy, 13–18 May).
PDF Project Page
3D Material Style Transfer
Chuong Nguyen, Tobias Ritschel, Elmar Eisemann, Karol Myszkowski, Hans-Peter Seidel
Comp. Graph. Forum 31(2) (Proc. Eurographics 2012, Cagliari / Italy, 13–18 May).
PDF Project Page
Pre-convolved Radiance Caching
Daniel Scherzer, Chuong Nguyen, Tobias Ritschel, Hans-Peter Seidel
Comp. Graph. Forum 31(4) (Proc. EGSR 2012, Paris, 4–6 June 2012)
PDF Project Page
Homunculus Warping: Conveying importance using self-intersection-free non-homogeneous mesh deformation
Bernhard Reinert, Tobias Ritschel, Hans-Peter Seidel
Comp. Graph. Forum 31(5) (Proc. Pacific Graphics 2012, Hong Kong, 12–14 September)
PDF Project Page
Virtual Passepartouts
Tobias Ritschel, Krzysztof Templin, Karol Myszkowski, Hans-Peter Seidel
Proc. NPAR 2012, Annecy/France, 4–6 June 2012
PDF Project Page
Interactive Cloud Rendering Using Temporally-Coherent Photon Mapping
Oskar Elek, Tobias Ritschel, Alexander Wilkie, Hans-Peter Seidel
Proc. Graphics Interface 2012, Toronto/Canada, 28–30 May 2012
PDF
Apparent Stereo: The Cornsweet Illusion Can Enhance Perceived Depth
Piotr Didyk, Tobias Ritschel, Elmar Eisemann, Karol Myszkowski, Hans-Peter Seidel
Proc. Human Vision and Electronic Imaging XVI, IS&T/SPIE's Symposium on Electronic Imaging, Burlingame/CA, 22–26 January 2012
PDF BiBteX Project Page

2011
A Perceptual Model for Disparity
Piotr Didyk, Tobias Ritschel, Elmar Eisemann, Karol Myszkowski, Hans-Peter Seidel
ACM Trans. Graph. 30(3), August 2011 (Proc. SIGGRAPH 2011, Vancouver / Canada).
PDF Video BibTeX Project Page
Edge-Aware Color Appearance
Min H. Kim, Tobias Ritschel, Jan Kautz
ACM Trans. Graph. 30(2), August 2011 (Presented at SIGGRAPH 2011, Vancouver / Canada).
PDF
Computer-suggested Facial Makeup
Kristina Scherbaum, Tobias Ritschel, Matthias Hullin, Thorsten Thormählen, V. Blanz, Hans-Peter Seidel
Comp. Graph. Forum (Proc. Eurographics 2011, Llandudno / UK), 2011.
PDF Video BibTeX Project Page
ManyLoDs: Parallel Many-View Level-of-Detail Selection for Real-Time Global Illumination
Matthias Holländer, Tobias Ritschel, Elmar Eisemann, Tamy Boubekeur
Comp. Graph. Forum (Proc. EGSR. Prague, 27–29 June 2011)
PDF Video Project Page
Making Imperfect Shadow Maps View-Adaptive: High-Quality Global Illumination in Large Dynamic Scenes
Tobias Ritschel, Elmar Eisemann, Inwoo Han, James D. K Kim, Hans-Peter Seidel
Comp. Graph. Forum (Presented at EGSR. Prague, 27–29 June 2011)
PDF Video
Bent Normals and Cones in Screen-space
Oliver Klehm, Tobias Ritschel, Elmar Eisemann, Hans-Peter Seidel
Proc. VMV. Berlin, 4–6 October 2011
PDF Video
Apparent Resolution Enhancement for Animations
Krzysztof Templin, Piotr Didyk, Tobias Ritschel, Elmar Eisemann, Karol Myszkowski, Hans-Peter Seidel
Proc. Spring Conference on Computer Graphics. Vinicne / Slovak Republic, 28–30 April 2011
PDF Project Page
Separable Ambient Occlusion
Jing Huang, Tamy Boubekeur, Matthias Holländer, Tobias Ritschel, Elmar Eisemann
Proc. Eurographics 2011 (Short Paper), Llandudno / UK, 2011.
PDF

2010
Interactive On-surface Signal Deformation
Tobias Ritschel, Thorsten Thormählen, Carsten Dachsbacher, Jan Kautz, Hans-Peter Seidel
ACM Trans. Graph. 29(4) (Proc. SIGGRAPH 2010, Los Angeles), 2010.
PDF Video BibTeX Project Page
Apparent Display Resolution Enhancement for Moving Images
Piotr Didyk, Elmar Eisemann, Tobias Ritschel, Karol Myszkowski, Hans-Peter Seidel
ACM Trans. Graph. 29(4) (Proc. SIGGRAPH 2010, Los Angeles), 2010.
PDF Video BibTeX Project Page
Perceptually-motivated Real-time Temporal Upsampling of 3-D Content for High-refresh-rate Displays
Piotr Didyk, Elmar Eisemann, Tobias Ritschel, Karol Myszkowski, Hans-Peter Seidel
Comp. Graph. Forum (Proc. Eurographics 2010, Norrköping, Sweden), 2010.
PDF AVI BibTeX Project Page
Adaptive Image-space Stereo Synthesis
Piotr Didyk, Tobias Ritschel, Elmar Eisemann, Karol Myszkowski, Hans-Peter Seidel
Proc. VMV 2010, 15–17. November 2010, Siegen, Germany
PDF AVI BibTeX Project Page
Camera Animation Style Transfer
Christian Kurz, Tobias Ritschel, Elmar Eisemann, Thorsten Thormählen, Hans-Peter Seidel
Proc. CVMP 2010, 17–18. November 2010, London, UK
PDF AVI

2009
Micro-Rendering for Scalable, Parallel Final Gathering
Tobias Ritschel, Thomas Engelhardt, Thorsten Grosch, Hans-Peter Seidel, Jan Kautz, Carsten Dachsbacher
ACM Trans. Graph. 28(5) (Proc. SIGGRAPH Asia 2009), 2009.
PDF AVI BibTeX Project Page
Interactive Reflection Editing
Tobias Ritschel, Makoto Okabe, Thorsten Thormählen, Hans-Peter Seidel
ACM Trans. Graph. 28(5) (Proc. SIGGRAPH Asia 2009), 2009.
PDF AVI BibTeX Project Page
Perceptual Influence of Approximate Visibility in Indirect Illumination
Insu Yu, Andrew Cox, Min H. Kim, Tobias Ritschel, Thorsten Grosch, Carsten Dachsbacher, Jan Kautz
ACM Trans. Applied Perception (Presented at APGV 2009, Chania, Crete), 2009
PDF
Temporal Glare: Real-Time Dynamic Simulation of the Scattering in the Human Eye
Tobias Ritschel, Matthias Ihrke, Jeppe R. Frisvad, Joris Coppens, Karol Myszkowski, Hans-Peter Seidel
Comp. Graph. Forum (Proc. Eurographics 2009. Munich, 30 March–3 April), 2009
PDF AVI BibTeX Project Page
Approximating Dynamic Global Illumination in Image Space
Tobias Ritschel, Thorsten Grosch, Hans-Peter Seidel
Proc. ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games (I3D) 2009
PDF AVI BibTeX Project Page
Real-time Indirect Illumination with Clustered Visibility
Zhao Dong, Thorsten Grosch, Tobias Ritschel, Jan Kautz, Hans-Peter Seidel
Proc. VMV 2009, 16–18. November 2009, Braunschweig / Germany
PDF AVI
A Perceptual Evaluation of 3D Unsharp Masking
Matthias B. Ihrke, Tobias Ritschel, Kaleigh Smith, Thorsten Grosch, Karol Myszkowski, Hans-Peter Seidel
Proc. Human Vision and Electronic Imaging XIII, 2009
PDF BibTeX Project Page

2008
Imperfect Shadow Maps for Efficient Computation of Indirect Illumination
Tobias Ritschel, Thorsten Grosch, Min H. Kim, Hans-Peter Seidel, Carsten Dachsbacher, Jan Kautz
ACM Trans. Graph. 27(5) (Proc. SIGGRAPH Asia 2008), 2008.
PDF AVI BibTeX Project Page
3D Unsharp Masking for Scene Coherent Enhancement
Tobias Ritschel, Kaleigh Smith, Matthias Ihrke, Thorsten Grosch, Karol Myszkowski, Hans-Peter Seidel:
ACM Trans. Graph. 27(3) (Proc. SIGGRAPH 2008), 2008.
PDF AVI BibTeX Project Page
Interactive Global Illumination Based on Coherent Surface Shadow Maps
Tobias Ritschel, Thorsten Grosch, Jan Kautz, Hans-Peter Seidel:
Proc. Graphics Interface, May 2008
PDF AVI BibTeX

2007
Interactive Illumination with Coherent Shadow Maps
Tobias Ritschel, Thorsten Grosch, Jan Kautz, Stefan Müller
Proc. Eurographics Symposium on Rendering 2007. Grenoble, June 25–27, 2007
PDF AVI BibTeX
Fast GPU-based Visibility Computation for Natural Illumination of Volume Data Sets.
Tobias Ritschel
Proc. Eurographics 2007 (Short Paper). Prague, September 3–7, 2007
PDF AVI BibTeX

2006
On-line Estimation of Diffuse Materials.
Tobias Ritschel, Thorsten Grosch
Proc. 3. GI-Fachtagung VR/AR. Koblenz, September 25–26, 2006
PDF AVI
Multiresolution GPU Mesh Painting.
Tobias Ritschel, Mario Botsch, Stefan Müller
Proc. Eurographics 2006 (Short Paper). Vienna, September 4–8, 2006
PDF AVI
Physikalische Simulation virtueller Charaktere durch Feder-Masse-Systeme am Beispiel einer "Virtuellen Marionette"
Tobias Ritschel, Stefan Müller
Proc. 2. GI-Fachtagung VR/AR. Aachen, September 26–27, 2005 (German)
PDF AVI

Recent Positions



Education



Previous Group Members

,
Daniel ScherzerPost doc
Chuong NguyenPhD student (Advanced Perceptual Design and Depiction of Materials)
Oskar ElekPhD student (Efficient Physically-based Rendering)
Konstantinos RematasVisiting PhD student
Pablo Bauszat,Visiting PhD student
Jiri VorbaVisiting PhD student
Ondrej Karlik,Visiting PhD student
Sukumar SrikanthMaster Student
Thomas LeimkühlerMaster Student
Andreas ZinsBachelor student
Adam LaskowksiIntern

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