Global form perception in motion-defined radial-frequency contours
نویسندگان
چکیده
منابع مشابه
Global shape coding for motion-defined radial-frequency contours
The visual system is highly skilled at recovering the shape of complex objects defined exclusively by motion cues. But while low-level and high-level mechanisms involved in shape-from-motion have been studied extensively, intermediate computational stages remain poorly understood. In the present study, we used motion-defined radial-frequency contours--or motion RFs--to probe intermediate stages...
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Radial frequency (RF) patterns have been used to study the processes involved in shape perception. The psychophysical literature suggests that there are distinct global and local shape detection processes for low and high radial frequency patterns, but this has not been tested in a combined contour pattern, such as would be needed to describe the contours of most natural objects. Here, we combi...
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We present three experiments that explored the effect of binocular disparity on the perception of contours defined by motion in a Spatiotemporal Boundary Formation. Depending on the disparity, the stimulus is perceived as an object that moves behind a holed surface (occluded configuration) or as a luminous transparency that moves over a surface that contains dots (occluding configuration). In a...
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Radial biases in the processing of motion and motion-defined 1 contours by human visual cortex 2 3 Colin.W.G. Clifford , Damien J. Mannion 1,2 & J. Scott McDonald 1 4 5 6 (1) School of Psychology, University of Sydney, Sydney, NSW 2006, Australia 7 (2) Australian Centre for Excellence in Vision Science 8 9 Corresponding author: 10 11 Associate Professor Colin WG Clifford 12 School of Psychology...
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Luminance gratings reportedly produce a stronger functional magnetic resonance imaging (fMRI) blood oxygen level-dependent (BOLD) signal in those parts of the retinotopic cortical maps where they are oriented radially to the point of fixation. We sought to extend this finding by examining anisotropies in the response of cortical areas V1-V3 to motion-defined contour stimuli. fMRI at 3 Tesla was...
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ژورنال
عنوان ژورنال: Journal of Vision
سال: 2004
ISSN: 1534-7362
DOI: 10.1167/4.8.36