Real Walking through Virtual Environments by Redirection Techniques (2009)
Frank Steinicke, Gerd Bruder, Klaus Hinrichs, Jason Jerald, Harald Frenz, Markus Lappe
We present redirection techniques that support exploration of large-scale virtual environments (VEs) by means of real walking. We quantify to what degree users can unknowingly be redirected in order...
Real Walking through Virtual Environments by Redirection Techniques (2008)
Steinicke, Frank, Bruder, Gerd, Hinrichs, Klaus, Jerald, Jason, Frenz, Harald, Lappe, Markus
We present redirection techniques that support exploration of large-scale virtual environments (VEs) by means of real walking. We quantify to what degree users can unknowingly be redirected in order...
Florentin Wörgötter, Norbert Kru Ger, Nicolas Pugeault, Dirk Calow, Markus Lappe, Karl Pauwels, ...
Abstract. The goal of this review is to discuss different strategies employed by the visual system to limit data-flow and to focus data processing. These strategies can be hardwired, like the...
Estimation of Travel Distance from Visual Motion in Virtual Environments (2008)
Harald Frenz, Markus Lappe, Thomas Bührmann
Distance estimation of visually simulated self-motion is difficult, because one has to know or make assumptions about scene layout to judge ego speed. Discrimination of the travel distances of two...
The Peri-Saccadic Perception of Objects and Space (2008)
Fred H. Hamker, Marc Zirnsak, Dirk Calow, Markus Lappe
Eye movements affect object localization and object recognition. Around saccade onset, briefly flashed stimuli appear compressed towards the saccade target, receptive fields dynamically change...
Fixation as a mechanism for stabilization of short image sequences (2007)
A novel method is introduced for the stabilization of short image sequences. Stabilization is achieved by means of fixation of the central image region using a variable window size block matching...
Visual distance estimation in static compared to moving virtual scenes (2006)
Visual motion is used to control direction and speed of self-motion and time-to-contact with an obstacle. In earlier work, we found that human subjects can discriminate between the distances of...
Karl Pauwels, Markus Lappe, M. Van Hulle
Abstract. A novel method is introduced for the stabilization of short image sequences. Stabilization is achieved by means of fixation of the central image region using a variable window size block...
Perisaccadic mislocalization orthogonal to saccade direction (2004)
Dr Marcus Kaiser, Markus Lappe
Saccadic eye movements transiently distort perceptual space. Visual objects flashed shortly before or during a saccade are mislocalized along the saccade direction resembling a compression of space...
Optic Flow Statistics and Intrinsic Dimensionality (2004)
Sinan Kalkan, Dirk Calow, Michael Felsberg, Florentin Wörgötter, Markus Lappe, Norbert Krüger
Different kinds of visual sub--structures (such as homogeneous, edge-like and junction-like patches) can be distinguished by the intrinsic dimensionality of the local signals. The concept of...
Optic Flow Statistics and Intrinsic Dimensionality (2004)
Sinan Kalkan, Dirk Calow, Michael Felsberg, Florentin Wörgötter, Markus Lappe, Norbert Krüger
Different kinds of visual sub--structures (such as homogeneous, edge-like and junction-like patches) can be distinguished by the intrinsic dimensionality of the local signals. The concept of...
Biologically Motivated Multi-modal Processing of Visual Primitives (2003)
Norbert Krüger, Markus Lappe, Florentin Wörgötter
We describe a new kind of image representation in terms of local multi--modal Primitives. These Primitives are motivated by processing of the human visual system as well as by functional...
The Position of Moving Objects (2000)
F9.756> (8 --10). Figure 1B explains our temporal-integration hypothesis. The offset between two objects that is perceived at time t is given by the average of the difference of the two position...
Temporal Recruitment along the Trajectory of Moving Objects and the Perception of Position (1999)
The trajectory of a moving object provides information about its velocity, direction and position. This information can be used to enhance the visual systems ability to detect changes in these...
The Position of Moving Objects. (1998)
Moving objects occupy a range of positions during the period of integration of the visual system. Nevertheless, a unique position is usually observed. We investigate how the trajectory of a stimulus...
Spatio-Temporal Interpolation Is Accomplished by Binocular Form and Motion Mechanisms
Kandil, Farid I., Lappe, Markus
Spatio-temporal interpolation describes the ability of the visual system to perceive shapes as whole figures (Gestalts), even if they are moving behind narrow apertures, so that only thin slices of...
The Peri-Saccadic Perception of Objects and Space
Hamker, Fred H, Zirnsak, Marc, Calow, Dirk, Lappe, Markus
Eye movements affect object localization and object recognition. Around saccade onset, briefly flashed stimuli appear compressed towards the saccade target, receptive fields dynamically change...
Impairments of Biological Motion Perception in Congenital Prosopagnosia
Lange, Joachim, De Lussanet, Marc, Kuhlmann, Simone, Zimmermann, Anja, Lappe, Markus, Zwitserlood, Pienie, ...
Prosopagnosia is a deficit in recognizing people from their faces. Acquired prosopagnosia results after brain damage, developmental or congenital prosopagnosia (CP) is not caused by brain lesion, but...