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Dr. Christian Wallraven

Address:	Spemannstr. 38 72076 Tübingen
Room number:	112
E-Mail:	christian.wallraven

Christian Wallraven

Position: Guest Scientist Unit: Alumni Bülthoff

Overview
Projects
Curriculum Vitae
Publications

As of March 2010, I am a Professor at the Department of Brain and Cognitive Engineering at Korea University. Visit my Cognitive Systems Lab homepage for more information!
Research statement

In my work, I am interested in bringing computer vision, computer graphics and psychophysics together in order to investigate fundamental perceptual and cognitive processes. This fusion of methods and approaches from these three research areas has the potential to greatly advance our understanding of the processes in the human brain.
In my research, I apply this approach to the investigation and modeling of face processing, multi-sensory object representation, object categorization, as well as to modeling of aesthetic perception.

Highly controllable, yet realistic computer-generated stimuli offer novel possibilities for advanced psychophysical experiments. The results from those experiments can be used to derive perceptual "shortcuts" to more efficient rendering approaches.
Algorithms from computer vision and machine learning can be used to model human performance. Conversely, the results from perceptual experiments can inform computer scientists about how the human brain solves "vision".
Generating virtual worlds with computer graphics also helps computer vision researchers, as "ground truth" is available for testing of recognition algorithms, for example. Such algorithms can on the other hand be used to generate and model highly complex scenes more quickly.

Conferences and Grants
- Local coordinator for the EU-sponsored project "POETICON", which aims to synthesize sensorimotor representations and natural language in everyday human interaction
- Co-organizer for the Fourth Symposium on Applied Perception in Graphics and Visualization (APGV07)
- Co-organizer for the second Biologically Motivated Computer Vision Workshop (BMCV2002)
- Local coordinator for the EU-sponsored project "Cognitive Vision Systems", which investigated methods and techniques to build active vision systems for recognition and categorization of objects and events

Selected publications
(For all publications, follow this link)

Dahl, C. D., C. Wallraven, H. H. Bülthoff and N. K. Logothetis: Humans and macaques employ similar face processing strategies. Current Biology 19(6), 509-513 (03 2009)
Wallraven, C., R. Fleming, D. W. Cunningham, J. Rigau, M. Feixas and M. Sbert: Categorizing art: comparing humans and computers. Computers and Graphics 33(4), 484-495 (08 2009)
Nusseck, M., D. W. Cunningham, C. Wallraven and H. H. Bülthoff: The contribution of different facial regions to the recognition of conversational expressions. Journal of Vision 8(8:1), 1-23 (06 2008)
Wallraven, C., M. Breidt, D. W. Cunningham and H. H. Bülthoff: Evaluating the Perceptual Realism of Animated Facial Expressions. ACM Transactions on Applied Perception 4(4:4), 1-20 (01 2008)
Cooke, T., F. Jäkel, C. Wallraven and H. H. Bülthoff: Multimodal Similarity and Categorization of Novel, Three-Dimensional Objects. Neuropsychologia 45(3), 484-495 (02 2007)
Wallraven, C., A. Schwaninger and H. H. Bülthoff: Learning from Humans: Computational Modeling of Face Recognition. Network: Computation in Neural Systems 16(4), 401-418 (12 2005)

Current projects
- A computational recognition system grounded in perceptual research. The system exploits the temporal information inherent in natural visual input for object learning and recognition and includes the first framework for interfacing local feature approaches with Support Vector Machines.
- Cross-species comparison of processing of faces (with C. Dahl)
- Perception of face expressions using computer animations and real videos (with D. Cunningham, and K. Kaulard)
- How do we perceive art? (with R. Fleming and R. Pepperell)
- Multimodal categorization of novel objects (with N. Gaissert)
- Visuohaptic processing of faces (with L. Dopjans)
- Computational modeling of scene gist (with C. Herdtweck)
- Recognition and categorization of objects from 3D data (with B. Browatzki and B. Graf and J. Kubacki from Fraunhofer IPA)
- Development of recording setups and processing pipelines for video sequences, 3D and 4D scanning (with M. Breidt, C. Curio, M. Kleiner)

1993	Abitur at Friedrich-List-Gymnasium in Reutlingen
1993-1999	studied Physics at the Eberhard-Karls-Universität in Tübingen
Oct 1997 - Mar 1998	DAAD - Stipend for studies at the University of Edinburgh
July 1998 - July 1999	Diploma thesis at Max Planck Institut for Biological Cybernetics on Stereo Reconstruction of Faces using Class-Based Knowledge
July 1999	Diploma of Physics (with distinction)
Sept 1999 - Oct 2006	PhD thesis at Max Planck Institut for Biological Cybernetics onA computational recognition system grounded in perceptual research
November 2002	co-organizer for the second workshop on Biologically Motivated Computer Vision
May 2001-June 2004	local co-ordinator for EU-funded COGVIS research grant
July 2007	co-organizer for the Fourth Symposium on Applied Perception in Graphics and Visualization
Sep 2009-Dec 2009	visiting researcher at Korea University
since Mar 2010	Professor at Korea University, head of http://cogsys.korea.ac.kr Cognitive Systems Lab

Books (1):
•	Wallraven C : A computational recognition system grounded in perceptual research, 190, Logos Verlag, Berlin, Germany, (August-2007). ISBN: 978-3-8325-1662-8
Proceedings (1):
•	Bülthoff HH , Lee S-W , Poggio TA and Wallraven C : Biologically Motivated Computer Vision: Second International Workshop, 2nd International Workshop on Biologically Motivated Computer Vision (BMCV 2002), 662, Springer, Berlin, Germany, (November-2002). 3-540-00174-3
Articles (29):
•	Wallraven C , Whittingstall L and Bülthoff HH (May-2013) Learning to recognize face shapes through serial exploration Experimental Brain Research 226(4) 513-523.
•	Chae Y , Chang D-S , Lee S-H , Jung W-M , Lee I-S , Jackson S , Kong J , Lee H , Park H-J , Lee H and Wallraven C (March-2013) Inserting Needles Into the Body: A Meta-Analysis of Brain Activity Associated With Acupuncture Needle Stimulation Journal of Pain 14(3) 215–222.
•	Chang D-S , Kim Y-J , Lee S-H , Lee H , Lee I-S , Park H-J , Wallraven C and Chae Y (March-2013) Modifying Bodily Self-Awareness during Acupuncture Needle Stimulation Using the Rubber Hand Illusion Evidence-Based Complementary and Alternative Medicine 2013 1-7.
•	Wallraven C and Dopjans L (March-2013) Visual experience is necessary for efficient haptic face recognition NeuroReport 24(5) 254–258.
•	Kaulard K , Cunningham DW , Bülthoff HH and Wallraven C (March-2012) The MPI Facial Expression Database: A Validated Database of Emotional and Conversational Facial Expressions PLoS One 7(3) 1-18.
•	Gaissert N and Wallraven C (January-2012) Categorizing natural objects: a comparison of the visual and the haptic modalities Experimental Brain Research 216(1) 123-134.
•	Dopjans L , Bülthoff HH and Wallraven C (January-2012) Serial exploration of faces: Comparing vision and touch Journal of Vision 12(1:6) 1-14.
•	Dahl CD , Logothetis NK , Bülthoff HH and Wallraven C (October-2011) Second-Order Relational Manipulations Affect Both Humans and Monkeys PLoS One 6(10) 1-7.
•	Gaissert N , Bülthoff HH and Wallraven C (September-2011) Similarity and categorization: From vision to touch Acta Psychologica 138(1) 219-230.
•	Stich T , Linz C , Wallraven C , Cunningham DW and Magnor M (January-2011) Perception-Motivated interpolation of image sequences ACM Transactions on Applied Perception 8(2) 1-28.
•	Dahl CD , Logothetis NK , Bülthoff HH and Wallraven C (October-2010) The Thatcher illusion in humans and monkeys Proceedings of the Royal Society of London B 277(1696) 2973-2981.
•	Gaissert N , Wallraven C and Bülthoff HH (September-2010) Visual and Haptic Perceptual Spaces Show High Similarity in Humans Journal of Vision 10(11:2) 1-20.
•	Cooke T , Wallraven C and Bülthoff HH (January-2010) Multidimensional scaling analysis of haptic exploratory procedures ACM Transactions on Applied Perception 7(1:7) 1-17.
•	Cunningham DW and Wallraven C (December-2009) Dynamic information for the recognition of conversational expressions Journal of Vision 9(13:7) 1-17.
•	Dopjans L , Wallraven C and Bülthoff HH (October-2009) Cross-Modal Transfer in Visual and Haptic Face Recognition IEEE Transactions on Haptics 200(4) 236-240.
•	Schwaninger A , Lobmaier JS , Wallraven C and Collishaw S (September-2009) Two Routes to Face Perception: Evidence From Psychophysics and Computational Modeling Cognitive Science 33(8) 1413-1440.
•	Wallraven C , Fleming R , Cunningham DW , Rigau J , Feixas M and Sbert M (August-2009) Categorizing art: Comparing humans and computers Computers and Graphics 33(4) 484-495.
•	Dahl CD , Wallraven C , Bülthoff HH and Logothetis NK (March-2009) Humans and Macaques Employ Similar Face-Processing Strategies Current Biology 19(6) 509-513.
•	Nusseck M , Cunningham DW , Wallraven C and Bülthoff HH (June-2008) The contribution of different facial regions to the recognition of conversational expressions Journal of Vision 8(8:1) 1-23.
•	Wallraven C , Breidt M , Cunningham DW and Bülthoff HH (January-2008) Evaluating the Perceptual Realism of Animated Facial Expressions ACM Transactions on Applied Perception 4(4:4) 1-20.
•	Vogel J , Schwaninger A , Wallraven C and Bülthoff HH (November-2007) Categorization of natural scenes: Local versus global information and the role of color ACM Transactions on Applied Perception 4(3:19) 1-21.
•	Wallraven C , Bülthoff HH , Fischer J , Cunningham DW and Bartz D (November-2007) Evaluation of Real-World and Computer-Generated Stylized Facial Expressions ACM Transactions on Applied Perception 4(3:16) 1-24.
•	Cooke T , Jäkel F , Wallraven C and Bülthoff HH (February-2007) Multimodal Similarity and Categorization of Novel, Three-Dimensional Objects Neuropsychologia 45(3) 484-495.
•	Cooke T , Kannengiesser S , Wallraven C and Bülthoff H (October-2006) Object feature validation using visual and haptic similarity ratings ACM Transactions on Applied Perception 3(3) 239-261.
•	Wallraven C , Schwaninger A and Bülthoff HH (December-2005) Learning from Humans: Computational Modeling of Face Recognition Network 16(4) 401-418.
•	Cunningham D , Kleiner M , Wallraven C and Bülthoff H (July-2005) Manipulating video sequences to determine the components of conversational facial expressions ACM Transactions on Applied Perception 2(3) 251-269.
•	Schwaninger A , Wallraven C and Bülthoff HH (September-2004) Computational Modeling of Face Recognition Based on Psychophysical Experiments Swiss Journal of Psychology 63(3) 207-215.
•	Cunningham D , Nusseck M , Wallraven C and Bülthoff HH (July-2004) The role of image size in the recognition of conversational facial expressions Computer Animation & Virtual Worlds 15(3-4) 305-310.
•	Newell F , Wallraven C and Huber S (March-2004) The role of characteristic motion in object categorization Journal of Vision 4(2) 118-129.
Conference papers (45):
•	Browatzki B , Tikhanoff V , Metta G , Bülthoff HH and Wallraven C (May-2012) Active Object Recognition on a Humanoid Robot IEEE International Conference on Robotics and Automation (ICRA 2012), IEEE, Piscataway, NJ, USA, 2021-2028.
•	Browatzki B , Fischer J , Graf B , Bülthoff HH and Wallraven C (November-2011) Going into depth: Evaluating 2D and 3D cues for object classification on a new, large-scale object dataset In: 2011 IEEE International Conference on Computer Vision Workshops (ICCV Workshops), 1st ICCV Workshop on Consumer Depth Cameras in Computer Vision (CD4CV2011), IEEE, Piscataway, NJ, USA, 1189-1195.
•	Gaissert N and Wallraven C (June-2011) Integrating Visual and Haptic Shape Information to Form a Multimodal Perceptual Space IEEE World Haptics Conference (WHC 2011), IEEE, Piscataway, NJ, USA, 451-456.
•	Herdtweck C and Wallraven C (July-2010) Horizon estimation: perceptual and computational experiments 7th Symposium on Applied Perception in Graphics and Visualization (APGV 2010), ACM, New York, NY, USA, 49-56.
•	Pastra K , Wallraven C , Schultze M , Vatakis A and Kaulard K (May-2010) The POETICON Corpus: Capturing Language Use and Sensorimotor Experience in Everyday Interaction Seventh International Conference on Language Resources and Evaluation (LREC 2010), ELRA, Paris, France, 3031-3036.
•	Gaissert N and Wallraven C (April-2010) Perceptual representations of parametrically-defined and natural objects comparing vision and haptics IEEE Haptics Symposium 2010, IEEE, Piscataway, NJ, USA, 35-42.
•	Gaissert N , Ulrichs K and Wallraven C (March-2010) Visual and Haptic Perceptual Spaces From Parametrically-Defined to Natural Objects AAAI 2010 Spring Symposium on Cognitive Shape Processing, AAAI Press, Menlo Park, CA, USA, 2-7.
•	Cunningham DW and Wallraven C (September-2009) The interaction between motion and form in expression recognition 6th Symposium on Applied Perception in Graphics and Visualization (APGV 2009), ACM Press, New York, NY, USA, 41-44.
•	Wallraven C , Cunningham DW , Rigau J , Feixas M and Sbert M (May-2009) Aesthetic appraisal of art: from eye movements to computers In: Computational Aesthetics 2009, Eurographics Workshop on Computational Aesthetics in Graphics, Visualization and Imaging, Eurographics, Aire-La-Ville, Switzerland, 137-144.
•	Spehr M , Wallraven C and Fleming RW (May-2009) Image statistics for clustering paintings according to their visual appearance In: Computational Aesthetics 2009, Eurographics Workshop on Computational Aesthetics in Graphics, Visualization and Imaging, Eurographics, Aire-La-Ville, Switzerland, 57-64.
•	Stich T , Linz C , Wallraven C , Cunningham DW and Magnor M (August-2008) Perception-motivated interpolation of image sequences 5th Symposium on Applied Perception in Graphics and Visualization (APGV 2008), ACM Press, New York, NY, USA, 97-106.
•	Gaissert N , Wallraven C and Bülthoff HH (June-2008) Analyzing perceptual representations of complex, parametrically-defined shapes using MDS In: Haptics: Perception, Devices and Scenarios, 6th International Conference EuroHaptics 2008, Springer, Berlin, Germany, 265-274.
•	Wallraven C , Cunningham DW and Fleming R (June-2008) Perceptual and Computational Categories in Art Computational Aesthetics 2008: Eurographics Workshop on Computational Aesthetics (CAe 2008), Eurographics Association, Aire-la-Ville, Switzerland, 131-138.
•	Bartz D , Cunningham DW , Fischer J and Wallraven C (April-2008) State-of-the-Art of the Role of Perception for Computer Graphics 29th Annual Conference Eurographics (EG 2008), Blackwell, Oxford, United Kingdom, 65-86.
•	Dahl CD , Möller S , Veres-Injac B and Wallraven C (March-2008) Gesichtswahrnehmung: interdisziplinäre Einsichten 50. Tagung Experimentell Arbeitender Psychologen (TeaP 2008), Pabst Science Publ., Lengerich, Germany, 63-66.
•	Campos JL , Nusseck H-G , Wallraven C , Mohler BJ and Bülthoff HH (November-2007) Visualization and (Mis)Perceptions in Virtual Reality 10. Workshop Sichtsysteme: Visualisierung in der Simulationstechnik, Shaker, Aachen, Germany, 10-14.
•	Griesser RT , Cunningham DW , Wallraven C and Bülthoff HH (July-2007) Psychophysical investigation of facial expressions using computer animated faces 4th Symposium on Applied Perception in Graphics and Visualization (APGV 2007), ACM Press, New York, NY, USA, 11-18.
•	Wallraven C , Kaulard K , Kürner C , Pepperell R and Bülthoff HH (July-2007) Psychophysics for perception of (in)determinate art 4th Symposium on Applied Perception in Graphics and Visualization (APGV 2007), ACM Press, New York, NY, USA, 115-122.
•	Schwaninger A , Schumacher S , Wallraven C and Bülthoff HH (July-2007) Using 3D computer graphics for perception: The role of local and global information in face processing 4th Symposium on Applied Perception in Graphics and Visualization (APGV 2007), ACM Press, New York, NY, USA, 19-26.