M. Graf, D. Kaping, H. H. Bülthoff
ABSTRACT—How do observers recognize objects after spatial transformations? Recent neurocomputational models have proposed that object recognition is based on coordinate transformations that align...
Control of a Lateral Helicopter Side-step Maneuver on an Anthropomorphic Robot (2008)
K. Beykirch, F. M. Nieuwenhuizen, H. J. Teufel, J. S. Butler, H. H. Bülthoff
Our society relies more and more on flight simulation for pilot training to enhance safety and reduce costs. But to meet the highest level of general technical requirements for simulators set forth...
Modeling Insect Compound Eyes: Space-Variant Spherical Vision (2008)
H. H. Bülthoff, 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,...
Working memory in wayfinding: a dual task experiment in a virtual city (2008)
Meilinger, T., Knauff, M., Bülthoff, H.H.
This study examines the working memory systems involved in human wayfinding. In the learning phase 24 participants learned two routes in a novel photorealistic virtual environment displayed on a...
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...
The integration of higher order form and motion by the human brain (2008)
Sarkheil, P., Vuong, Q.C., Bülthoff, H.H., Noppeney, U.
Our experience with a dynamic environment has tuned our visual system to use form and motion as complementary sources of information for object recognition. To identify the neural systems involved in...
The prototype effect revisited: Evidence for an abstract feature model of face recognition (2008)
Wallis, G., Siebeck, U.E., Swann, K., Blanz, V., Bülthoff, H.H.
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...
Bayesian motion estimation accounts for a surprising bias in 3D vision (2008)
Welchman, A.E., Lam, J.M., Bülthoff, H.H.
Determining the approach of a moving object is a vital survival skill that depends on the brain combining information about lateral translation and motion-in-depth. Given the importance of sensing...
Bülthoff, H.H., Campos, J.L., Meilinger, T., Freksa, C., Newcombe, N. S., Gärdenfors, P., ...
The interdisciplinary research field of spatial cognition has benefited greatly from the use of advanced Virtual Reality (VR) technologies. Such tools have provided the ability to explicitly control...
Probing Dynamic Human Facial Action Recognition From The Other Side Of The Mean (2008)
Curio, C., Giese, M.A., Breidt, M., Kleiner, M., Bülthoff, H.H., Creem-Regehr, S. H., ...
Insights from human perception of moving faces have the potential to provide interesting insights for technical animation systems as well as in the neural encoding of facial expressions in the brain....
Exploring Human Dynamic Facial Expression Recognition with Animation (2008)
Curio, C., Giese, M.A., Breidt, M., Kleiner, M., Bülthoff, H.H.
Engel, D., Curio, C., Tcheang, L., Mohler, B., Bülthoff, H.H., Feiner, S., ...
Experience indicates that the sense of presence in a virtual environment is enhanced when the participants are able to actively move through it. When exploring a virtual world by walking, the size of...
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...
LibGaze: Real-time gaze-tracking of freely moving observers for wall-sized displays (2008)
Herholz, S., Chuang, L.L., Tanner, T.G., Bülthoff, H.H., Fleming, R.W., Deussen, O., ...
We present a mobile system for tracking the gaze of an observer in real-time as they move around freely and interact with a wall-sized display. The system combines a head-mounted eye tracker with a...
A full-body avatar improves egocentric distance judgments in an immersive virtual environment (2008)
Mohler, B., Bülthoff, H.H., Thompson, W.B., Creem-Regehr, S.H., Creem-Regehr, S. H., Myszkowski, K.
A number of investigators have reported that distance judgments in virtual environments (VEs) are systematically smaller than distance judgments made in comparably-sized real environments. Many...
Performance Measurements on the MPI Stewart Platform (2008)
Nieuwenhuizen, F.M., Beykirch, K., Mulder, M., Paassen, M.M. Van, Bonten, J.L.G., Bülthoff, H.H.
The report AGARD-AR-144 provides a framework for systematically assessing the dynamic characteristics of flight simulator motion systems. Several measurements defined in the report were performed on...
Learning System Dynamics: Transfer of Training in a Helicopter Hover Simulator (2008)
Teufel, H.J., Nieuwenhuizen, F.M., Bülthoff, H.H.
Transfer of training between the simulation of an inert and an agile helicopter dynamic was assessed involving a quasi-transfer design. The focus of this study was to test the ability of...
Joint and individual walking in an immersive collaborative virtual environment (2008)
Streuber, S., Chatziastros, A., Mohler, B.J., Bülthoff, H.H., Creem-Regehr, S. H., Myszkowski, K.
The aim of this experiment was to determine to which extent humans optimize their walking behavior in different conditions while navigating in a virtual maze. In two conditions participants either...
Mohler, B., Schulte-Pelkum, J., Bülthoff, H.H., Lin, M., Steed, A., ...
Vection is defined as the compelling sensation of illusory self- motion elicited by a moving sensory, usually visual, stimulus. This paper presents collected introspective data on the experience of...
Tricking people into feeling like they are moving when they are not paying attention (2008)
Streuber, S., Mohler, B.J., Schulte-Pelkum, J., Bülthoff, H.H., Creem-Regehr, S. H., ...
Vection refers to illusion of self motion in stationary obervers usually by means of moving visual stimuli [Fischer and Kornmüller 1930]. Linear vection naturally occurs when seated in a train and...
Measuring Visual Shape using Computer Graphics Psychophysics (2007)
www.kyb.tuebingen.mpg.de/bu
Measuring Visual Shape using (2007)
Computer Graphics Psychophysics, M. S. Langer, H. H. Bülthoff
This paper reviews recent psychophysical methods that have been developed for measuring the perceived shape of objects. We discuss two types of shape ambiguities that exist for many objects -- a...
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...
Isovist analysis captures properties of space relevant for locomotion and experience (2007)
Wiener, J.M., Franz, G., Rossmanith, N., Reichelt, A., Mallot, H.A., Bülthoff, H.H.
In a series of exploratory experiments we investigated interrelations between structure and shape of architectural indoor spaces on the one hand, and affective experience and navigation behaviour on...
Do HDR displays support LDR content?: a psychophysical evaluation (2007)
Akyüz, A.O., Fleming, R.W., Riecke, B.E., Reinhard, E., Bülthoff, H.H.
The development of high dynamic range (HDR) imagery has brought us to the verge of arguably the largest change in image display technologies since the transition from black-and-white to color...
A Bayesian model of the disambiguation of gravitoinertial force by visual cues (2007)
MacNeilage, P.R., Banks, M.S., Berger, D.R., Bülthoff, H.H.
The otoliths are stimulated in the same fashion by gravitational and inertial forces, so otolith signals are ambiguous indicators of self-orientation. The ambiguity can be resolved with added visual...
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...
Mühlberger, A., Bülthoff, H.H., Wiedemann, G., Pauli, P.
An overall assessment of phobic fear requires not only a verbal self-report of fear but also an assessment of behavioral and physiological responses. Virtual reality can be used to simulate realistic...
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,...
MPI Motion Simulator: Development and Analysis of a Novel Motion Simulator (2007)
Teufel, H.J., Beykirch, K.A., Butler, J.S., Kerger, M., Bülthoff, H.H.
This paper discusses the technical issues that were required to adapt a KUKA Robocoaster for use as a real-time motion simulator. Within this context, the paper addresses the physical modifications...
Perception and prediction of simple object interactions (2007)
Nusseck, M., Lagarde, J., Bardy, B., Fleming, R., Bülthoff, H.H.
For humans, it is useful to be able to visually detect an object‘s physical properties. One potentially important source of information is the way the object moves and interacts with other...
Identification of Pilot Control Behavior in a Roll-Lateral Helicopter Hover Task (2007)
Nieuwenhuizen, F.M., Beykirch, K., Mulder, M., Bülthoff, H.H.
This paper focuses on the influence of different forms of motion feedback on the per- ception and control behavior of pilots in a roll-lateral helicopter hover task. To identify this influence, a...
Mohler, B., Campos, J., Weyel, M., Bülthoff, H.H.
Full-body motion tracking data was collected for six subjects during free walking. Each participant was asked to walk to a previously seen target under four experimental conditions: eyes closed...
Orientation Specificity in Long-Term-Memory for Environmental Spaces (2007)
Meilinger, T., Riecke, B.E., Bülthoff, H.H.
This study examined orientation specificity in long-term human memory for environmental spaces. Twenty participants learned an immersive virtual environment by walking a multi-segment route in one...
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,...
Visualization and (Mis)Perceptions in Virtual Reality (2007)
Campos, J.L., 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...
Control of a Lateral Helicopter Sidestep Maneuver on an Anthropomorphic Robot (2007)
Beykirch, K., Nieuwenhuizen, F.M., Teufel, H.J., Butler, J.S., Bülthoff, H.H.
Our society relies more and more on flight simulation for pilot training to enhance safety and reduce costs. But to meet the highest level of general technical requirements for simulators set forth...
The role of visual cues and whole-body rotations in helicopter hovering control (2007)
Berger, D.R., Terzibas, C., Beykirch, K., Bülthoff, H.H.
Helicopters in flight are unstable, much like an inverse pendulum, and hovering at one spot requires the pilot to do a considerable amount of active control. To date, it is still under discussion...
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., 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...
Recognising novel deforming objects (2006)
Chuang, L., Vuong, Q.C., Thornton, I.M., Bülthoff, H.H.
Current theories of visual object recognition tend to focus on static properties, particularly shape. Nonetheless, visual perception is a dynamic experienceas a result of active observers or moving...
An advantage for detecting dynamic targets in natural scenes (2006)
Vuong, Q.C., Hof, A.F., Bülthoff, H.H., Thornton, I.M.
In the present study we tested the extent to which observers use dynamic information to detect targets in natural scenes. For this purpose, we used composite images in which target sequences were...
Cognitive Factors can Influence Self-Motion Perception (Vection) in Virtual Reality (2006)
Riecke, B.E., Schulte-Pelkum, J., Avraamides, M.N., Bülthoff, H.H.
Research on self-motion perception and simulation has traditionally focussed on the contribution of physical stimulus properties (bottom-up factors) using abstract stimuli. Here, we demonstrate that...
Spatial updating in virtual reality: the sufficiency of visual information (2006)
Riecke, B.E., Cunningham, D.W., Bülthoff, H.H.
Robust and effortless spatial orientation critically relies on automatic and obligatory spatial updating, a largely automatized and reflex-like process that transforms our mental egocentric...
A search advantage for faces learned in motion (2006)
Pilz, K.S., Thornton, I.M., Bülthoff, H.H.
Recently there has been growing interest in the role that motion might play in the perception and representation of facial identity. Most studies have considered old/new recognition as a task....
A Bayesian Model of the Disambiguation of Gravitoinertial Force by Visual Cues (2006)
MacNeilage, P., Banks, M., Berger, D.R., Bülthoff, H.H.
The otoliths are stimulated in the same fashion by gravitational and inertial forces, so otolith signals are ambiguous indicators of self-orientation. The ambiguity can be resolved with added visual...
Image-based material editing (2006)
Kahn, E.A., Reinhard, E., Fleming, R.W., Bülthoff, H.H.
Photo editing software allows digital images to be blurred, warped or re-colored at the touch of a button. However, it is not currently possible to change the material appearance of an object except...
3D shape perception from combined depth cues in human visual cortex (2005)
Welchman, A.E., Deubelius, A., Conrad, V., Bülthoff, H.H., Kourtzi, Z.
Our perception of the world's three-dimensional (3D) structure is critical for object recognition, navigation and planning actions. To accomplish this, the brain combines different types of visual...
Riecke, B.E., Schulte-Pelkum, J., Bülthoff, H.H., Rogowitz, B. E., Pappas, T. N., Daly, S. J.
In Virtual Reality, considerable systematic spatial orientation problems frequently occur that do not happen in comparable real-world situations. This study investigated possible origins of these...
In the presented exploratory study, quantitative relations between the experience of architectural spaces and physical properties were investigated using virtual reality (VR) simulations. Geometric...
Similar cortical correlates underlie visual object identification and orientation judgment (2005)
Altmann, C., Grodd, W., Kourtzi, Z., Bülthoff, H.H., Karnath, H.
Visual object perception has been suggested to follow two different routes in the human brain: a ventral, view-invariant occipitaltemporal route processes object identity, whereas a dorsal,...
Cognitive Influences on Self-Rotation Perception (2005)
In this study we examined the types of information that can influence the perception of upright (yaw) rotations. Specifically, we examined the influence of stimulus magnitude, task-induced attention...
Machine Learning Applied to Perception: Decision Images for Classification (2005)
Wichmann, F.A., Graf, A.B.A., Simoncelli, E.P., Bülthoff, H.H., Schölkopf, B., Saul, L. K., ...
We study gender discrimination of human faces using a combination of psychophysical classification and discrimination experiments together with methods from machine learning. We reduce the...
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...
Towards Lean and Elegant Self-Motion Simulation in Virtual Reality (2005)
Riecke, B.E., Schulte-Pelkum, J., Caniard, F., Bülthoff, H.H.
Despite recent technological advances, convincing self-motion simulation in Virtual Reality (VR) is difficult to achieve, and users of-ten suffer from motion sickness and/or disorientation in the...
Recognizing novel deforming objects (2005)
Chuang, L., Vuong, Q.C., Thornton, I.M., Bülthoff, H.H.
Human visual recognition can be improved with object motion (e.g., faces, Lander and Chuang, 2005; rigid objects, Vuong and Tarr, 2004) This improvement suggests that it is not merely shape...
The role of external features for person recognition (2005)
Pilz, K., Thornton, I.M., Bülthoff, H.H.
Face recognition is a remarkable human skill, as we are able to remember many thousands of faces. A great deal of research has investigated how it is possible to achieve such high levels of...
Graf, M., Kaping, D., Bülthoff, H.H.
How do we recognize objects after spatial transformations? Recent neurocomputational models proposed that object recognition is based on coordinate transformations which align memory and stimulus...
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...
Cooke,T., Cunningham,D.W., Bülthoff,H.H.
When an object moves, it covers and uncovers texture in the background. This pattern of is sufficient to define the object's shape, velocity, relative depth, and degree of transparency, a process...
Perceiving translucent materials (2004)
Fleming,R.W., Jensen,H.W., Bülthoff,H.H.
Many common materials, including fruit, wax and human skin, are somewhat translucent. What makes an object look translucent or opaque? Here we use a recently developed computer graphics model of...
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...
Merging the Senses into a Robust Percept (2004)
For perceiving the environment our brain uses multiple sources of sensory information derived from several different modalities, including vision, touch and audition. All these different sources of...
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...
Effects of rearranged Vision on Event-related Lateralizations of the EEG during Pointing (2004)
Berndt,I., Franz,V.H., Bülthoff,H.H., Götz,K.G., Wascher,E.
We used event-related lateralizations of the EEG (ERLs) and reversed vision to study visuomotor processing with conflicting proprioceptive and visual information during pointing. Reversed vision...
Learning from Labeled and Unlabeled Data Using Random Walks (2004)
Zhou, D., Schölkopf, B., Rasmussen, C.E., Bülthoff, H.H., Giese, M.A., Schölkopf, B.
We consider the general problem of learning from labeled and unlabeled data. Given a set of points, some of them are labeled, and the remaining points are unlabeled. The goal is to predict the labels...
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...
Cooke, T., Cunningham, D.W., Bülthoff, H.H., Rasmussen, C.E., Buelthoff, H.H., Giese, M., ...
When an object moves, it covers and uncovers texture in the background. This pattern of is sufficient to define the object's shape, velocity, relative depth, and degree of transparency, a process...
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...
Efficient Approximations for Support Vector Machines in Object Detection (2004)
Kienzle, W., Bakir, G.H., Franz, M.O., Schölkopf, B., Rasmussen, C. E., Bülthoff, H. H., ...
We present a new approximation scheme for support vector decision functions in object detection. In the present approach we are building on an existing algorithm where the set of support vectors is...
Hilbertian Metrics on Probability Measures and their Application in SVM's (2004)
Hein, H., Lal, T.N., Bousquet, O., Rasmussen, C. E., Bülthoff, H. H., Giese, M., ...
The goal of this article is to investigate the field of Hilbertian metrics on probability measures. Since they are very versatile and can therefore be applied in various problems they are of great...
Semi-supervised kernel regression using whitened function classes (2004)
Franz, M.O., Kwon, Y., Rasmussen, C.E., Schölkopf, B., Rasmussen, C. E., Bülthoff, H. H., ...
The use of non-orthonormal basis functions in ridge regression leads to an often undesired non-isotropic prior in function space. In this study, we investigate an alternative regularization technique...
Perceiving translucent materials (2004)
Fleming, R.W., Jensen, H.W., Bülthoff, H.H.
Many common materials, including fruit, wax and human skin, are somewhat translucent. What makes an object look translucent or opaque? Here we use a recently developed computer graphics model of...
EEG Channel Selection for Brain Computer Interface Systems Based on Support Vector Methods (2004)
Schröder, M., Lal, T.N., Bogdan, M., Schölkopf, B., Bülthoff, H.H., Mallot, H.A., ...
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...
Multivariate Regression via Stiefel Manifold Constraints (2004)
Bakir, G.H., Gretton, A., Franz, M.O., Schölkopf, B., Rasmussen, C. E., Bülthoff, H. H., ...
We introduce a learning technique for regression between high-dimensional spaces. Standard methods typically reduce this task to many one-dimensional problems, with each output dimension considered...
Selective Attention to Auditory Stimuli: A Brain-Computer Interface Paradigm (2004)
Hill, N.J., Lal, T.N., Schröder, M., Hinterberger, T., Birbaumer, N., Schölkopf, B., ...
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...
Merging the Senses into a Robust Percept (2004)
For perceiving the environment our brain uses multiple sources of sensory information derived from several different modalities, including vision, touch and audition. All these different sources of...
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...
Effects of rearranged Vision on Event-related Lateralizations of the EEG during Pointing (2004)
Berndt, I., Franz, V.H., Bülthoff, H.H., Götz, K.G., Wascher, E.
We used event-related lateralizations of the EEG (ERLs) and reversed vision to study visuomotor processing with conflicting proprioceptive and visual information during pointing. Reversed vision...
While it is well known that the built environment influences our emotional state, it is often difficult to attribute these experiences to particular properties. In fact, a systematic investigation of...
Cross-modal perception of actively explored objects. (2003)
Newell,F.N., Bülthoff,H.H., Ernst,M.O.
Many objects in our world can be picked up and freely manipulated, thus allowing information about an object to be available to both the visual and haptic systems. However, we understand very little...
Extrinsic cues aid shape recognition from novel viewpoints (2003)
Christou,C.G., Tjan,B.S., Bülthoff,H.H.
It has been shown previously that the visual recognition of shape is susceptible to the mismatch between the retinal input and its representation in long-term memory, especially when this mismatch...
Perceptual organization of local elements into global shapes in the human visual cortex (2003)
Altmann,C.F., Bülthoff,H.H., Kourtzi,Z.
The question of how local image features on the retina are integrated into perceived global shapes is central to our understanding of human visual perception. Psychophysical investigations have...
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...
Beiträge zur 6. Tübinger Wahrnehmungskonferenz (2003)
Bülthoff,H.H., Gegenfurtner,K.R., Mallot,H.A., Ulrich,R., Wichmann,F.A.
A chimeric point-light walker (2003)
Thornton,I.M., Vuong,Q.C., Bülthoff,H.H.
Ambiguity has long been used as a probe into visual processing. In this paper we describe a new form of dynamic ambiguous stimuli the chimeric point-light walker which we hope will prove to be...
Interactions between view changes and shape changes in picture - picture matching (2003)
Lawson,R., Bülthoff,H.H., Dumbell,S.
Four experiments are reported in which pictures of different morphs of novel, complex, 3-D objects, similar to objects which we must identify in the real world, were presented. We investigated how...
The use of facial motion and facial form during the processing of identity. (2003)
Knappmeyer,B., Thornton,I.M., Bülthoff,H.H.
Previous research has shown that facial motion can carry information about age, gender, emotion and, at least to some extent, identity. By combining recent computer animation techniques with...
Grasp effects of the Ebbinghaus illusion: Obstacle-avoidance is not the explanation. (2003)
Franz,V.H., Bülthoff,H.H., Fahle,M.
The perception-versus-action hypothesis states that visual information is processed in two different streams, one for visual awareness (or perception) and one for motor performance. Previous reports...
Cross-modal perception of actively explored objects. (2003)
Newell, F.N., Bülthoff, H.H., Ernst, M.O., Oakley, I., Modhrain, S. O, Newell, F.
Many objects in our world can be picked up and freely manipulated, thus allowing information about an object to be available to both the visual and haptic systems. However, we understand very little...
Franz, G., Bülthoff, H.H., Dokonal, W., Hirschberg, U.
While it is well known that the built environment influences our emotional state, it is often difficult to attribute these experiences to particular properties. In fact, a systematic investigation of...
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.
Beiträge zur 6. Tübinger Wahrnehmungskonferenz (2003)
Bülthoff, H.H., Gegenfurtner, K.R., Mallot, H.A., Ulrich, R., Wichmann, F.A.
A chimeric point-light walker (2003)
Thornton, I.M., Vuong, Q.C., Bülthoff, H.H.
Ambiguity has long been used as a probe into visual processing. In this paper we describe a new form of dynamic ambiguous stimuli the chimeric point-light walker which we hope will prove to be...
Interactions between view changes and shape changes in picture - picture matching (2003)
Lawson, R., Bülthoff, H.H., Dumbell, S.
Four experiments are reported in which pictures of different morphs of novel, complex, 3-D objects, similar to objects which we must identify in the real world, were presented. We investigated how...
The use of facial motion and facial form during the processing of identity. (2003)
Knappmeyer, B., Thornton, I.M., Bülthoff, H.H.
Previous research has shown that facial motion can carry information about age, gender, emotion and, at least to some extent, identity. By combining recent computer animation techniques with...
Grasp effects of the Ebbinghaus illusion: Obstacle-avoidance is not the explanation. (2003)
Franz, V.H., Bülthoff, H.H., Fahle, M.
The perception-versus-action hypothesis states that visual information is processed in two different streams, one for visual awareness (or perception) and one for motor performance. Previous reports...
Extrinsic cues aid shape recognition from novel viewpoints (2003)
Christou, C.G., Tjan, B.S., Bülthoff, H.H.
It has been shown previously that the visual recognition of shape is susceptible to the mismatch between the retinal input and its representation in long-term memory, especially when this mismatch...
Perceptual organization of local elements into global shapes in the human visual cortex (2003)
Altmann, C.F., Bülthoff, H.H., Kourtzi, Z.
The question of how local image features on the retina are integrated into perceived global shapes is central to our understanding of human visual perception. Psychophysical investigations have...
Gaze-eccentricity Effects on Road Position and Steering (2002)
Readinger,W.O., Chatziastros,A., Cunningham,D.W., Bülthoff,H.H., Cutting,J.E.
The effects of gaze-eccentricity on the steering of an automobile were studied. Drivers performed an attention task while attempting to drive down the middle of a straight road in a simulation....
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...
Behavior-oriented Vision for Biomimetic Flight Control (2002)
Most flying insects extract information about their spatial orientation and self-motion from visual cues such as global patterns of light intensity or optic flow. We present an insect-inspired...
Visual Homing is possible without Landmarks - A Path Integration Study in Virtual Reality (2002)
The literature often suggests that proprioceptive and especially vestibular cues are required for navigation and spatial orientation tasks involving rotations of the observer. To test this notion, we...
Categorical Perception of Familiar Objects. (2002)
We report three experiments where the categorical perception of familiar, three-dimensional objects was investigated. A continuum of shape change between 15 pairs of objects was created and the...
Object-selective Responses in the Human Motion Area MT/MST (2002)
Kourtzi,Z., Bülthoff,H.H., Erb,M., Grodd,W.
The perception of moving objects and our successful interaction with them entail that the visual system integrates shape and motion information about objects. However, neuroimaging studies have...
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...
Object Recognition, Neurophysiology (2002)
As viewing distance, viewing angle or lighting conditions change, so too does the image of an object which we see. Despite the seemingly endless variety of images that objects can project, the human...
Funktionelle Prinzipien der Objekt- und Gesichtserkennung (2002)
Bülthoff,H.H., Ruppertsberg,A.I.
Es ist nicht leicht, einem Laien zu erklären, warum das Erkennen von Objekten ein nicht triviales Problem darstellt, da wir es doch anscheinend so mühelos dadurch lösen, dass wir die Gegenstände...
An Unexpected Role for Visual Feedback in Vehicle Steering Control. (2002)
Wallis,G.M., Chatziastros,A., Bülthoff,H.H.
Some motor tasks can be completed, quite literally, with our eyes shut. Most people can touch their nose without looking or reach for an object after only a brief glance at its location. This...
Berndt,I., Franz,V.H., Bülthoff,H.H., Wascher,E.
In two experiments, we investigated hemispheric electroencephalography (EEG) differences in 9(12) healthy volunteers during pointing to lateral and central targets. The questions addressed were...
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., ...
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., 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...
Behavior-oriented Vision for Biomimetic Flight Control (2002)
Most flying insects extract information about their spatial orientation and self-motion from visual cues such as global patterns of light intensity or optic flow. We present an insect-inspired...
Gender Classification of Human Faces (2002)
Graf, A.B.A., Wichmann, F.A., Bülthoff, H. H., 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., 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...
Visual Homing is possible without Landmarks - A Path Integration Study in Virtual Reality (2002)
The literature often suggests that proprioceptive and especially vestibular cues are required for navigation and spatial orientation tasks involving rotations of the observer. To test this notion, we...
Gaze-eccentricity Effects on Road Position and Steering (2002)
Readinger, W.O., Chatziastros, A., Cunningham, D.W., Bülthoff, H.H., Cutting, J.E.
The effects of gaze-eccentricity on the steering of an automobile were studied. Drivers performed an attention task while attempting to drive down the middle of a straight road in a simulation....
Categorical Perception of Familiar Objects. (2002)
We report three experiments where the categorical perception of familiar, three-dimensional objects was investigated. A continuum of shape change between 15 pairs of objects was created and the...
Object-selective Responses in the Human Motion Area MT/MST (2002)
Kourtzi, Z., Bülthoff, H.H., Erb, M., Grodd, W.
The perception of moving objects and our successful interaction with them entail that the visual system integrates shape and motion information about objects. However, neuroimaging studies have...
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...
Object Recognition, Neurophysiology (2002)
Wallis, G.M., Bülthoff, H.H., Arbib, M. A.
As viewing distance, viewing angle or lighting conditions change, so too does the image of an object which we see. Despite the seemingly endless variety of images that objects can project, the human...
Visuomotor Control in Flies and Behavior-based Agents (2002)
Huber, S.A., Bülthoff, H.H., Duro, R. J., Santos, J., Grana, M.
Funktionelle Prinzipien der Objekt- und Gesichtserkennung (2002)
Bülthoff, H.H., Ruppertsberg, A.I., Thier, P.
Es ist nicht leicht, einem Laien zu erklären, warum das Erkennen von Objekten ein nicht triviales Problem darstellt, da wir es doch anscheinend so mühelos dadurch lösen, dass wir die Gegenstände...
An Unexpected Role for Visual Feedback in Vehicle Steering Control. (2002)
Wallis, G.M., Chatziastros, A., Bülthoff, H.H.
Some motor tasks can be completed, quite literally, with our eyes shut. Most people can touch their nose without looking or reach for an object after only a brief glance at its location. This...
Berndt, I., Franz, V.H., Bülthoff, H.H., Wascher, E.
In two experiments, we investigated hemispheric electroencephalography (EEG) differences in 9(12) healthy volunteers during pointing to lateral and central targets. The questions addressed were...
Beiträge zur 5. Tübinger Wahrnehmungskonferenz. (2002)
Bülthoff, H.H., Gegenfurtner, K.R., Mallot, H.A., Ulrich, R.
Object Recognition, Neurophysiology (2002)
As viewing distance, viewing angle or lighting conditions change, so too does the image of an object which we see. Despite the seemingly endless variety of images that objects can project, the human...
Grasping visual illusions: No evidence for a dissociation between perception and action (2000)
V. H. Franz, K. R. Gegenfurtner, H. H. Bülthoff, M. Fahle
Abstract—Neuropsychological studies prompted the theory that the primate visual system might be organized into two parallel pathways, one for conscious perception and one for guiding action....
Psychophysical support for a two-dimensional view interpolation theory of object recognition.
Does the human brain represent objects for recognition by storing a series of two-dimensional snapshots, or are the object models, in some sense, three-dimensional analogs of the objects they...
Psychophysical support for a two-dimensional view interpolation theory of object recognition.
Does the human brain represent objects for recognition by storing a series of two-dimensional snapshots, or are the object models, in some sense, three-dimensional analogs of the objects they...