Dynamic information for the recognition of conversational expressions (2009)
Cunningham, D.W., Wallraven, C.
Communication is critical for normal, everyday life. During a conversation, information is conveyed in a number of ways, including through body, head, and facial changes. While much research has...
Humans and Macaques Employ Similar Face-Processing Strategies (2009)
Dahl, C.D., Wallraven, C., Bülthoff, H.H., Logothetis, N.K.
Primates developed the ability to recognize and individuate their conspecifics by the face. Despite numerous electrophysiological studies in monkeys [13], little is known about the face-processing...
Cross-Modal Transfer in Visual and Haptic Face Recognition (2009)
Dopjans, L., Wallraven, C., Bülthoff, H.H.
We report four psychophysical experiments investigating cross-modal transfer in visual and haptic face recognition. We found surprisingly good haptic performance and cross-modal transfer for both...
Two Routes to Face Perception: Evidence From Psychophysics and Computational Modeling (2009)
Schwaninger, A., Lobmaier, J.S., Wallraven, C., Collishaw, S.
Categorizing art: Comparing humans and computers (2009)
Wallraven, C., Fleming, R., Cunningham, D.W., Rigau, J., Feixas, M., Sbert, M.
The categorization of art (paintings, literature) into distinct styles such as Expressionism, or Surrealism has had a profound influence on how art is presented, marketed, analyzed, and historicized....
Image statistics for clustering paintings according to their visual appearance (2009)
Spehr, M., Wallraven, C., Fleming, R.W., Deussen, O., Fellner, D. W., Dodgson, N. A.
Untrained observers readily cluster paintings from different art periods into distinct groups according to their overall visual appearance or look [WCF08]. These clusters are typically influenced by...
Aesthetic appraisal of art: from eye movements to computers (2009)
Wallraven, C., Cunningham, D.W., Rigau, J., Feixas, M., Sbert, M., Deussen, O., ...
By looking at a work of art, an observer enters into a dialogue. In this work, we attempt to analyze this dialogue with both behavioral and computational tools. In two experiments, observers were...
The interaction between motion and form in expression recognition (2009)
Cunningham, D.W., Wallraven, C., Mania, K., Riecke, B. E., Spencer, S. N., Bodenheimer, B., ...
Faces are a powerful and versatile communication channel. Physically, facial expressions contain a considerable amount of information, yet it is clear from stylized representations such as cartoons...
Modeling Insect Compound Eyes: Space-Variant Spherical Vision (2008)
H. H. Bülthoff, S. -w. Lee, T. Poggio, C. Wallraven, Titus R. Neumann
Abstract. Insect compound eyes are highly optimized for the visual acquisition of behaviorally relevant information from the environment. Typical sampling and filtering properties include a spherical...
Visualization and (Mis)Perceptions in Virtual Reality (2008)
J. Campos, H-g. Nusseck, C. Wallraven, B. J. Mohler, H. H. Bülthoff
Abstract: Virtual Reality (VR) technologies are now being widely adopted for use in areas as diverse as surgical and military training, architectural design, driving and flight simulation,...
The contribution of different facial regions to the recognition of conversational expressions (2008)
Nusseck, M., Cunningham, D.W., Wallraven, C., Bülthoff, H.H.
The human face is an important and complex communication channel. Humans can, however, easily read in a face not only identity information, but also facial expressions with high accuracy. Here, we...
Evaluating the Perceptual Realism of Animated Facial Expressions (2008)
Wallraven, C., Breidt, M., Cunningham, D.W., Bülthoff, H.H.
The human face is capable of producing an astonishing variety of expressionsexpressions for which sometimes the smallest difference changes the perceived meaning considerably. Producing...
State-of-the-Art of the Role of Perception for Computer Graphics (2008)
Bartz, D., Cunningham, D.W., Fischer, J., Wallraven, C., Brown, P.
Traditionally, computer graphics strived to achieve the technically best representation of the scenario or scene. For rendering, this lead to the preeminence of representations based on the physics...
Analyzing perceptual representations of complex, parametrically-defined shapes using MDS (2008)
Gaissert, N., Wallraven, C., Bülthoff, H.H., Ferre, M.
In this study we show that humans are able to form a perceptual space from a complex, three-dimensional shape space that is highly congruent to the physical object space no matter if the participants...
Perception-motivated interpolation of image sequences (2008)
Stich, T., Linz, C., Wallraven, C., Cunningham, D.W., Magnor, M., Creem-Regehr, S. H., ...
We present a method for image interpolation which is able to create high-quality, perceptually convincing transitions between recorded images. By implementing concepts derived from human vision, the...
Perceptual and Computational Categories in Art (2008)
Wallraven, C., Cunningham, D.W., Fleming, R., Brown, P.
The categorization of art (paintings, literature) into distinct styles such as expressionism, or surrealism has had a profound influence on how art is presented, marketed, analyzed, and historicized....
Multimodal Similarity and Categorization of Novel, Three-Dimensional Objects (2007)
Cooke, T., Jäkel, F., Wallraven, C., Bülthoff, H.H.
Similarity has been proposed as a fundamental principle underlying mental object representations and capable of supporting cognitive-level tasks such as categorization. However, much of the research...
Evaluation of Real-World and Computer-Generated Stylized Facial Expressions (2007)
Wallraven, C., Bülthoff, H.H., Fischer, J., Cunningham, D.W., Bartz, D.
The goal of stylization is to provide an abstracted representation of an image that highlights specific types of visual information. Recent advances in computer graphics techniques have made it...
In the Eye of the Beholder: Perception of Indeterminate Art (2007)
Wallraven, C., Kaulard, K., Kürner, C., Pepperell, R., Bülthoff, H.H.
How do we interpret an object - a scene - a painting? Perception research and art illuminate from different angles how the vast amount of information in our visually perceived environment is...
Psychophysics for perception of (in)determinate art (2007)
Wallraven, C., Kaulard, K., Kürner, C., Pepperell, R., Bülthoff, H.H.
The question of how humans perceive art and how the sensory percept is endowed with aesthetics by the human brain has continued to fascinate psychologists and artists alike. It seems, for example,...
Psychophysical investigation of facial expressions using computer animated faces (2007)
Griesser, R.T., Cunningham, D.W., Wallraven, C., Bülthoff, H.H.
The human face is capable of producing a large variety of facial expressions that supply important information for communication. As was shown in previous studies using unmanipulated video sequences,...
Perceptual reparameterization of material properties (2007)
Cunningham, D.W., Wallraven, C., Fleming, R.W., Strasser, W.
The recent increase in both the range and the subtlety of computer graphics techniques has greatly expanded the possibilities for synthesizing images. In many cases, however, the relationship between...
Visualization and (Mis)Perceptions in Virtual Reality (2007)
Campos, J.L., Nusseck, H.-G., Wallraven, C., Mohler, B.J., Bülthoff, H.H., Möller, R., ...
Virtual Reality (VR) technologies are now being widely adopted for use in areas as diverse as surgical and military training, architectural design, driving and flight simulation, psychotherapy, and...
The Evaluation of Stylized Facial Expressions (2006)
Wallraven, C., Fischer, J., Cunningham, D.W., Bartz, D., Bülthoff, H.H.
Stylized rendering aims to abstract information in an image making it useful not only for artistic but also for visualization purposes. Recent advances in computer graphics techniques have made it...
Cunningham, D.W., Nusseck, H.-G., Teufel, H., Wallraven, C., Bülthoff, H.H.
Virtual Reality (VR) is increasingly being used in industry, medicine, entertainment, education, and research. It is generally critical that the VR setups produce behavior that closely resembles real...
Schwaninger, A., Wallraven, C., Cunningham, D.W., Chiller-Glaus, S.
A deeper understanding of how the brain processes visual information can be obtained by comparing results from complementary fields such as psychophysics, physiology and computer science. In this...
Manipulating video sequences to determine the components of conversational facial expressions (2005)
Cunningham, D., Kleiner, M., Wallraven, C., Bülthoff, H.
Communication plays a central role in everday life. During an average conversation, information is exchanged in a variety of ways, including through facial motion. Here, we employ a custom,...
A Comparison of Visual and Haptic Object Representations Based on Similarity (2005)
Cooke, T., Wallraven, C., Bülthoff, H.H.
Do we judge similarity between two objects to be the same using touch and vision? We investigated this using psychophysical experiments in which subjects rated the similarity between objects...
Psychophysical evaluation of animated facial expressions (2005)
Wallraven, C., Breidt, M., Cunningham, D., Bülthoff, H.
The human face is capable of producing an astonishing variety of expressions---expressions for which sometimes the smallest difference changes the perceived meaning noticably. Producing...
Multi-viewpoint video capture for facial perception research (2004)
Kleiner,M., Wallraven,C., Breidt,M., Cunningham,D.W., Bülthoff,H.H.
In order to produce realistic-looking avatars, computer graphics has traditionally relied solely on physical realism. Research on cognitive aspects of face perception, however, can provide insights...
The role of image size in the recognition of conversational facial expressions (2004)
Cunningham,D.W., Nusseck,M., Wallraven,C., Bülthoff,H.H.
Facial expressions can be used to direct the flow of a conversation as well as to improve the clarity of communication. The critical physical differences between expressions can, however, be small...
View dependence of complex versus simple facial motions (2004)
Wallraven,C., Cunningham,D.W., Breidt,M., Bülthoff,H.H.
In order to produce realistic-looking avatars, computer graphics has up to now relied solely on physical realism. Research on cognitive aspects of face perception, however, can provide insights into...
The components of conversational facial expressions. (2004)
Cunningham,D.W., Kleiner,M., Wallraven,C., Bülthoff,H.H.
Conversing with others is one of the most central of human behaviours. In any conversation, humans use facial motion to help modify what is said, to control the flow of a dialog, or to convey complex...
Computational Modeling of Face Recognition Based on Psychophysical Experiments (2004)
Schwaninger,A., Wallraven,C., Bülthoff,H.H.
Recent results from psychophysical studies are discussed which clearly show that face processing is not only holistic. Humans do encode face parts (component information) in addition to information...
View dependence of complex versus simple facial motions (2004)
Wallraven, C., Cunningham, D.W., Breidt, M., Bülthoff, H.H., Bülthoff, H. H., Rushmeier, H.
In order to produce realistic-looking avatars, computer graphics has up to now relied solely on physical realism. Research on cognitive aspects of face perception, however, can provide insights into...
Multi-viewpoint video capture for facial perception research (2004)
Kleiner, M., Wallraven, C., Breidt, M., Cunningham, D.W., Bülthoff, H.H., Thalmann, N. M., ...
In order to produce realistic-looking avatars, computer graphics has traditionally relied solely on physical realism. Research on cognitive aspects of face perception, however, can provide insights...
The components of conversational facial expressions. (2004)
Cunningham, D.W., Kleiner, M., Wallraven, C., Bülthoff, H.H.
Conversing with others is one of the most central of human behaviours. In any conversation, humans use facial motion to help modify what is said, to control the flow of a dialog, or to convey complex...
Computational Modeling of Face Recognition Based on Psychophysical Experiments (2004)
Schwaninger, A., Wallraven, C., Bülthoff, H.H.
Recent results from psychophysical studies are discussed which clearly show that face processing is not only holistic. Humans do encode face parts (component information) in addition to information...
The role of image size in the recognition of conversational facial expressions (2004)
Cunningham, D.W., Nusseck, M., Wallraven, C., Bülthoff, H.H.
Facial expressions can be used to direct the flow of a conversation as well as to improve the clarity of communication. The critical physical differences between expressions can, however, be small...
Bastian Leibe, Bernt Schiele, Ales Leonardis, Barbara Caputo, Christian Wallraven, B. Leibe, ...
The capability for robust object categorization in real-world scenes is at the core of any cognitive vision system and will be a key component for our envisioned target scenario of a mobile visual...
Recognition with Local Features: the Kernel Recipe (2003)
Wallraven,C., Caputo,B., Graf,A.B.A.
Recent developments in computer vision have shown that local features can provide efficient representations suitable for robust object recognition. Support Vector Machines have been established as...
How Believable are Real Faces: Towards a Perceptual Basis for Conversational Animation (2003)
Cunningham,D.W., Breidt,M., Kleiner,M., Wallraven,C., Bülthoff,H.H.
Regardless of whether the humans involved are virtual or real, well-developed conversational skills are a necessity. The synthesis of embodied agents that are not only understandable but also...
Recognition with Local Features: the Kernel Recipe (2003)
Wallraven, C., Caputo, B., Graf, A.B.A.
Recent developments in computer vision have shown that local features can provide efficient representations suitable for robust object recognition. Support Vector Machines have been established as...
How Believable are Real Faces: Towards a Perceptual Basis for Conversational Animation (2003)
Cunningham, D.W., Breidt, M., Kleiner, M., Wallraven, C., Bülthoff, H.H.
Regardless of whether the humans involved are virtual or real, well-developed conversational skills are a necessity. The synthesis of embodied agents that are not only understandable but also...
Combining 3D Scans and Motion Capture for Realistic Facial Animation (2003)
Breidt, M., Wallraven, C., Cunningham, D.W., Bülthoff, H.H., Julian, F., Cano, P.
Facial Animation Based on 3D Scans and Motion Capture (2003)
Breidt, M., Wallraven, C., Cunningham, D.W., Bülthoff, H.H., Campbell, N.
View-based Recognition of Faces in Man and Machine: Re-visiting Inter-Extra-Ortho (2002)
Wallraven,C., Schwaninger,A., Schuhmacher,S., Bülthoff,H.H.
For humans, faces are highly overlearned stimuli, which are encountered in everyday life in all kinds of poses and views. Using psychophysics we investigated the effects of viewpoint on human face...
View-based Dynamic Object Recognition Based on Human Perception (2002)
Bülthoff,H.H., Wallraven,C., Graf,A.B.A.
Psychophysical studies have shown that humans actively exploit temporal information such as contiguity of images in object recognition. We have recently developed a recognition system which uses...
Bülthoff,H.H., Lee,S.-W., Poggio,T., Wallraven,C.
View-based Recognition of Faces in Man and Machine: Re-visiting Inter-Extra-Ortho (2002)
Wallraven, C., Schwaninger, A., Schuhmacher, S., Bülthoff, H.H., Bülthoff, H. H., Lee, S.-W., ...
For humans, faces are highly overlearned stimuli, which are encountered in everyday life in all kinds of poses and views. Using psychophysics we investigated the effects of viewpoint on human face...
Role of Featural and Configural Information in Familiar and Unfamiliar Face Recognition (2002)
Schwaninger, A., Lobmaier, J., Collishaw, S.M., Bülthoff, H. H., Lee, S.-W., Poggio, T., ...
Using psychophysics we investigated to what extent human face recognition relies on local information in parts (featural information) and on their spatial relations (configural information). This is...
Gender Classification of Human Faces (2002)
Graf, A.B.A., Wichmann, F.A., Bülthoff, H. H., Lee, S.-W., Poggio, T. A., Wallraven, C.
This paper addresses the issue of combining pre-processing methods---dimensionality reduction using Principal Component Analysis (PCA) and Locally Linear Embedding (LLE)---with Support Vector Machine...
Insect-Inspired Estimation of Self-Motion (2002)
Franz, M.O., Chahl, J.S., Bülthoff, H. H., Lee, S.-W., Poggio, T. A., Wallraven, C.
The tangential neurons in the fly brain are sensitive to the typical optic flow patterns generated during self-motion. In this study, we examine whether a simplified linear model of these neurons can...
View-based Dynamic Object Recognition Based on Human Perception (2002)
Bülthoff, H.H., Wallraven, C., Graf, A.B.A.
Psychophysical studies have shown that humans actively exploit temporal information such as contiguity of images in object recognition. We have recently developed a recognition system which uses...