scholarly journals 3D shape discrimination using relative disparity derivatives

2006 ◽  
Vol 46 (25) ◽  
pp. 4181-4192 ◽  
Author(s):  
Dawn Vreven
Keyword(s):  
Shape Discrimination ◽  
3D Shape

scholarly journals Visual and haptic geometry of 3D shape discrimination

2015 ◽  
Vol 15 (12) ◽  
pp. 866 ◽  
Author(s):  
Flip Phillips ◽  
Emerson O'Donnell ◽  
Noah Kernis
Keyword(s):  
Shape Discrimination ◽  
3D Shape

scholarly journals Neural Correlates of Disparity-Defined Shape Discrimination in the Human Brain

2007 ◽  
Vol 97 (2) ◽  
pp. 1553-1565 ◽  
Author(s):  
Chandramouli Chandrasekaran ◽  
Victor Canon ◽  
Johannes C. Dahmen ◽  
Zoe Kourtzi ◽  
Andrew E. Welchman
Keyword(s):  
Binocular Disparity ◽  
3D Structure ◽  
Three Dimensional ◽  
Discrimination Performance ◽  
Cortical Activity ◽  
Shape Discrimination ◽  
3D Shape ◽  
Contour Segmentation ◽  
Early Visual Cortex ◽  
3D Shape Perception

Binocular disparity, the slight differences between the images registered by our two eyes, provides an important cue when estimating the three-dimensional (3D) structure of the complex environment we inhabit. Sensitivity to binocular disparity is evident at multiple levels of the visual hierarchy in the primate brain, from early visual cortex to parietal and temporal areas. However, the relationship between activity in these areas and key perceptual functions that exploit disparity information for 3D shape perception remains an important open question. Here we investigate the link between human cortical activity and the perception of disparity-defined shape, measuring fMRI responses concurrently with psychophysical shape judgments. We parametrically degraded the coherence of shapes by shuffling the spatial position of dots whose disparity defined the 3D structure and investigated the effect of this stimulus manipulation on both cortical activity and shape discrimination. We report significant relationships between shape coherence and fMRI response in both dorsal (V3, hMT+/V5) and ventral (LOC) visual areas that correspond to the observers' discrimination performance. In contrast to previous suggestions of a dichotomy of disparity-related processes in the ventral and dorsal streams, these findings are consistent with proposed interactions between these pathways that may mediate a continuum of processes important in perceiving 3D shape from coarse contour segmentation to fine curvature estimation.

scholarly journals The role of symmetry in 3D shape discrimination across changes in viewpoint

2012 ◽  
Vol 12 (9) ◽  
pp. 1048-1048 ◽  
Author(s):  
E. Egan ◽  
J. Todd ◽  
F. Phillips
Keyword(s):  
Shape Discrimination ◽  
3D Shape

scholarly journals Stereo improves 3D shape discrimination even when rich monocular shape cues are available

2011 ◽  
Vol 11 (11) ◽  
pp. 342-342
Author(s):  
Y. Lim Lee ◽  
J. Saunders
Keyword(s):  
Shape Discrimination ◽  
3D Shape

scholarly journals Symmetry facilitates 3D shape discrimination across changes in viewpoint

2011 ◽  
Vol 11 (11) ◽  
pp. 55-55
Author(s):  
J. Saunders ◽  
Y. Lee
Keyword(s):  
Shape Discrimination ◽  
3D Shape

scholarly journals A spherical harmonic model for 3D shape discrimination

2010 ◽  
Vol 10 (7) ◽  
pp. 67-67
Author(s):  
F. phillips ◽  
E. Egan ◽  
J. Lesperance ◽  
K. Komek
Keyword(s):  
Spherical Harmonic ◽  
Shape Discrimination ◽  
Harmonic Model ◽  
3D Shape ◽  
Spherical Harmonic Model

scholarly journals Stereo improves 3D shape discrimination even when rich monocular shape cues are available

2011 ◽  
Vol 11 (9) ◽  
pp. 6-6 ◽  
Author(s):  
Y. Lim Lee ◽  
J. A. Saunders
Keyword(s):  
Shape Discrimination ◽  
3D Shape

Solar Flare Energetic Neutral Emission Measurements in the Project Coronas-I

1994 ◽  
Vol 144 ◽  
pp. 635-639
Author(s):  
J. Baláž ◽  
A. V. Dmitriev ◽  
M. A. Kovalevskaya ◽  
K. Kudela ◽  
S. N. Kuznetsov ◽  
...  
Keyword(s):  
Solar Flare ◽  
Energy Range ◽  
Gamma Rays ◽  
Pulse Shape ◽  
Gamma Ray ◽  
Pulse Shape Discrimination ◽  
Shape Discrimination ◽  
Solar Neutron ◽  
Low Altitude

AbstractThe experiment SONG (SOlar Neutron and Gamma rays) for the low altitude satellite CORONAS-I is described. The instrument is capable to provide gamma-ray line and continuum detection in the energy range 0.1 – 100 MeV as well as detection of neutrons with energies above 30 MeV. As a by-product, the electrons in the range 11 – 108 MeV will be measured too. The pulse shape discrimination technique (PSD) is used.

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