Results 221 to 230 of about 243,313 (267)

Motion Detection and Motion Verbs

Psychological Science, 2007
Recent theories propose that semantic representation and sensorimotor processing have a common substrate via simulation. We tested the prediction that comprehension interacts with perception, using a standard psychophysics methodology. While passively listening to verbs that referred to upward or downward motion, and to control verbs that did not ...
Lotte, Meteyard, Bahador, Bahrami, Gabriella, Vigliocco   +2 more
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Actionable saliency detection: Independent motion detection without independent motion estimation

2012 IEEE Conference on Computer Vision and Pattern Recognition, 2012
We present a model and an algorithm to detect salient regions in video taken from a moving camera. In particular, we are interested in capturing small objects that move independently in the scene, such as vehicles and people as seen from aerial or ground vehicles.
G. Georgiadis, A. Ayvaci, S. Soatto
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Mechanisms of visual motion detection

Nature Neuroscience, 2000
Visual motion is processed by neurons in primary visual cortex that are sensitive to spatial orientation and speed. Many models of local velocity computation are based on a second stage that pools the outputs of first-stage neurons selective for different orientations, but the nature of this pooling remains controversial.
P R, Schrater, D C, Knill, E P, Simoncelli   +2 more
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Detecting motion anomalies

Proceedings of the 8th ACM SIGSPATIAL Workshop on GeoStreaming, 2017
An unsupervised methodology is presented for the detection of motion anomalies using spatial context and multivariate statistical tests. The method is applied to GPS data captured for a taxi fleet in Porto, Portugal; and, AIS data captured for ships operating in the Aegean Sea.
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Motion anisotropies and heading detection

Biological Cybernetics, 1995
In motion-processing areas of the visual cortex in cats and monkeys, an anisotropic distribution of direction selectivities displays a preference for movements away from the fovea. This 'centrifugal bias' has been hypothetically linked to the processing of optic flow fields generated during forward locomotion.
Lappe, Markus, Rauschecker, Josef P.
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Luminance contrast and motion detection

Vision Research, 1990
Direction discrimination was used to measure the minimum and maximum displacement for the detection of motion (Dmin and Dmax) for abruptly displaced sinewave gratings. This was measured for a range of contrast levels from 2 to 32 times the detection threshold for a range of spatially narrow band stimuli. Performance for Dmin (but not Dmax) was found to
J C, Boulton, R F, Hess
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Polarization contrast and motion detection

Journal of Comparative Physiology A, 2006
Form and motion perception rely upon the visual system's capacity to segment the visual scene based upon local differences in luminance or wavelength. It is not clear if polarization contrast is a sufficient basis for motion detection. Here we show that crayfish optomotor responses elicited by the motion of images derived from spatiotemporal variations
Raymon M, Glantz, John P, Schroeter
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Energetic motion detection

Nature, 1995
P J, Bex, N, Brady, R E, Fredericksen, R F, Hess   +3 more
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Robust periodic motion and motion symmetry detection

Proceedings IEEE Conference on Computer Vision and Pattern Recognition. CVPR 2000 (Cat. No.PR00662), 2002
We describe a robust technique for detecting nonstationary periodic motion from a moving and static camera. We also describe a robust technique for discriminating motion symmetries (periodic motion classification), which we apply to classifying running humans (bipeds) and canines (quadrupeds). The system has been implemented to run in real-time (30 Hz)
R. Cutler, L. Davis
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Picosecond detection of electron motion

Nature Nanotechnology, 2019
The motion of a single electron can now be sampled with picosecond resolution, which helps to characterize and understand non-equilibrium electron dynamics in nanoscale conductors.
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