scholarly journals Pushing the limits of transparent-motion detection with binocular disparity

2006 ◽  
Vol 46 (16) ◽  
pp. 2615-2624 ◽  
Author(s):  
John A. Greenwood ◽  
Mark Edwards
Keyword(s):  
Motion Detection ◽  
Binocular Disparity ◽  
Transparent Motion

scholarly journals Transparent-motion detection requires bimodal population activity

2010 ◽  
Vol 7 (9) ◽  
pp. 37-37
Author(s):  
J. A. Greenwood ◽  
M. Edwards
Keyword(s):  
Motion Detection ◽  
Population Activity ◽  
Transparent Motion

A Transparent Motion Aftereffect Contingent on Binocular Disparity

Perception ◽  
1994 ◽  
Vol 23 (10) ◽  
pp. 1181-1188 ◽  
Author(s):  
Frans A J Verstraten ◽  
Reinder Verlinde ◽  
R Eric Fredericksen ◽  
Wim A van de Grind
Keyword(s):  
Binocular Disparity ◽  
Motion Aftereffect ◽  
Stimulus Configuration ◽  
Retinal Disparity ◽  
Transparent Motion ◽  
Stationary Test ◽  
Vector Sum ◽  
Moving Patterns

Under transparent motion conditions overlapping surfaces are perceived simultaneously, each with its own direction. The motion aftereffect (MAE) of transparent motion, however, is unidirectional and its direction is opposite to that of a sensitivity-weighted vector sum of both inducing vectors. Here we report a bidirectional and transparent MAE contingent on binocular disparity. Depth (from retinal disparity) was introduced between two patterns. A fixation dot was presented at zero disparity, that is, located between the two adaptation patterns. After adaptation to such a stimulus configuration testing was carried out with two stationary test patterns at the same depths as the preceding moving patterns. For opposite directions a clear transparent MAE was perceived. However, if the adaptation directions were orthogonal the chance of a transparent MAE being perceived decreased substantially. This was subject dependent. Some subjects perceived an orthogonal transparent MAE whereas others saw the negative vector sum—an integrated MAE. In addition the behaviour of the MAE when the distance in depth between adapting and test patterns was increased was investigated: it was found that the visibility of the MAE then decreased. Visibility is defined in this paper as: (i) the percentage of the trials in which MAEs are perceived and (ii) the average MAE duration. Both measures decreased with increasing distance. The results suggest that segregation and integration may be mediated by direction-tuned channels that interact with disparity-tuned channels.

scholarly journals Does Binocular Disparity Facilitate the Detection of Transparent Motion?

Perception ◽  
10.1068/p2742 ◽  
1999 ◽  
Vol 28 (2) ◽  
pp. 183-191 ◽  
Author(s):  
Paul B Hibbard ◽  
Mark F Bradshaw
Keyword(s):  
Binocular Disparity ◽  
Transparent Motion

Computing Stereo Disparity and Motion with Known Binocular Cell Properties

1994 ◽  
Vol 6 (3) ◽  
pp. 390-404 ◽  
Author(s):  
Ning Qian
Keyword(s):  
Visual Cortex ◽  
Receptive Field ◽  
Stereo Vision ◽  
Motion Detection ◽  
Binocular Disparity ◽  
Stereo Disparity ◽  
Random Dot Stereograms ◽  
Disparity Maps ◽  
Physiological Studies

Many models for stereo disparity computation have been proposed, but few can be said to be truly biological. There is also a rich literature devoted to physiological studies of stereopsis. Cells sensitive to binocular disparity have been found in the visual cortex, but it is not clear whether these cells could be used to compute disparity maps from stereograms. Here we propose a model for biological stereo vision based on known receptive field profiles of binocular cells in the visual cortex and provide the first demonstration that these cells could effectively solve random dot stereograms. Our model also allows a natural integration of stereo vision and motion detection. This may help explain the existence of units tuned to both disparity and motion in the visual cortex.

scholarly journals Global-motion detection with transparent-motion signals

1999 ◽  
Vol 39 (13) ◽  
pp. 2239-2249 ◽  
Author(s):  
Mark Edwards ◽  
Shin'ya Nishida
Keyword(s):  
Motion Detection ◽  
Global Motion ◽  
Transparent Motion

Cooking Motion Detection by Using Kinect

2016 ◽  
Vol 136 (12) ◽  
pp. 1759-1760
Author(s):  
Masao Izumi ◽  
Kenji Hashimoto
Keyword(s):  
Motion Detection
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