scholarly journals Relative binocular disparity: Role of orientation

2004 ◽  
Vol 4 (8) ◽  
pp. 583-583 ◽  
Author(s):  
B. Farell ◽  
S. Li
Keyword(s):  
Binocular Disparity

scholarly journals The role of binocular disparity and projected size in the detection of curved trajectories

2012 ◽  
Vol 12 (9) ◽  
pp. 1194-1194
Author(s):  
R. Pierce ◽  
Z. Bian ◽  
M. Braunstein ◽  
G. Andersen
Keyword(s):  
Binocular Disparity ◽  
Curved Trajectories

scholarly journals Human primary visual cortex shows larger population receptive fields for binocular disparity-defined stimuli

2021 ◽  
Author(s):  
Ivan Alvarez ◽  
Samuel A. Hurley ◽  
Andrew J. Parker ◽  
Holly Bridge
Keyword(s):  
Receptive Field ◽  
Binocular Disparity ◽  
Receptive Fields ◽  
Stereoscopic Vision ◽  
Neural Representation ◽  
Receptive Field Properties ◽  
Visual Areas ◽  
Electrophysiological Studies ◽  
Specific Stimulation

AbstractThe visual perception of 3D depth is underpinned by the brain’s ability to combine signals from the left and right eyes to produce a neural representation of binocular disparity for perception and behaviour. Electrophysiological studies of binocular disparity over the past 2 decades have investigated the computational role of neurons in area V1 for binocular combination, while more recent neuroimaging investigations have focused on identifying specific roles for different extrastriate visual areas in depth perception. Here we investigate the population receptive field properties of neural responses to binocular information in striate and extrastriate cortical visual areas using ultra-high field fMRI. We measured BOLD fMRI responses while participants viewed retinotopic mapping stimuli defined by different visual properties: contrast, luminance, motion, correlated and anti-correlated stereoscopic disparity. By fitting each condition with a population receptive field model, we compared quantitatively the size of the population receptive field for disparity-specific stimulation. We found larger population receptive fields for disparity compared with contrast and luminance in area V1, the first stage of binocular combination, which likely reflects the binocular integration zone, an interpretation supported by modelling of the binocular energy model. A similar pattern was found in region LOC, where it may reflect the role of disparity as a cue for 3D shape. These findings provide insight into the binocular receptive field properties underlying processing for human stereoscopic vision.

scholarly journals Human Primary Visual Cortex Shows Larger Population Receptive Fields for Binocular Disparity-Defined Stimuli

2021 ◽  
Author(s):  
Ivan Alvarez ◽  
Samuel Hurley ◽  
Andrew John Parker ◽  
Holly Bridge
Keyword(s):  
Receptive Field ◽  
Binocular Disparity ◽  
Receptive Fields ◽  
Stereoscopic Vision ◽  
Neural Representation ◽  
Neural Population ◽  
Receptive Field Properties ◽  
Visual Areas ◽  
Electrophysiological Studies

Abstract The visual perception of 3D depth is underpinned by the brain's ability to combine signals from the left and right eyes to produce a neural representation of binocular disparity for perception and behavior. Electrophysiological studies of binocular disparity over the past two decades have investigated the computational role of neurons in area V1 for binocular combination, while more recent neuroimaging investigations have focused on identifying specific roles for different extrastriate visual areas in depth perception. Here we investigate the neural population receptive field properties of responses to binocular information in striate and extrastriate cortical visual areas using ultra-high field fMRI. We measured BOLD fMRI responses while participants viewed retinotopic-mapping stimuli defined by different visual properties: contrast, luminance, motion, correlated and anti-correlated stereoscopic disparity. By fitting each condition with a population receptive field model, we were able to compare quantitatively the size of the population receptive field for disparity-defined vs not disparity-defined stimulation conditions. We found larger population receptive fields for disparity compared to the contrast and luminance stimuli in area V1, the first stage of binocular combination, which likely reflects the binocular integration zone, an interpretation supported by modelling of the binocular energy model. A similar pattern was found in region LOC, where it may reflect the role of disparity as a cue for 3D shape. These findings provide insight into the binocular receptive field properties underlying processing for human stereoscopic vision.

scholarly journals The Role of Binocular Disparity in Rapid Scene and Pattern Recognition

i-Perception ◽  
10.1068/i0587 ◽  
2013 ◽  
Vol 4 (2) ◽  
pp. 122-136 ◽  
Author(s):  
Matteo Valsecchi ◽  
Baptiste Caziot ◽  
Benjamin T. Backus ◽  
Karl R. Gegenfurtner
Keyword(s):  
Pattern Recognition ◽  
Binocular Disparity

Perceived Angular and Linear Size: The Role of Binocular Disparity and Visual Surround

Perception ◽  
1997 ◽  
Vol 26 (1) ◽  
pp. 17-27 ◽  
Author(s):  
Hirohiko Kaneko ◽  
Keiji Uchikawa
Keyword(s):  
Causal Relationship ◽  
Retinal Image ◽  
Binocular Disparity ◽  
Angular Size ◽  
The Other ◽  
Linear Size ◽  
Image Size ◽  
Other Hand

An experiment was conducted to investigate the effects of perspective cue and binocular disparity on perceived angular and linear size. Following the ‘angular’ and ‘linear’ instructions, subjects matched the size of two squares, for which the binocular disparity between the centers of the squares and the configuration of the stimulus surrounding the squares were manipulated. Results showed that angular-size matches depended on the retinal-image size and the binocular disparity, and not on the visual-surround stimulus. Linear-size matches, on the other hand, depended on the visual-surround stimulus as well as on the image size and the binocular disparity. The visual-surround stimulus also affects the perceived depth between the test squares. These findings indicate that perceived angular and linear size depend on different processes that use different cues, and suggest that there is a causal relationship between perceived depth and perceived linear size.

The role of binocular disparity and active motion parallax in cybersickness

2021 ◽  
Author(s):  
Siavash Eftekharifar ◽  
Anne Thaler ◽  
Adam O. Bebko ◽  
Nikolaus F. Troje
Keyword(s):  
Binocular Disparity ◽  
Motion Parallax ◽  
Active Motion

scholarly journals Specialized contributions of mid-tier stages of dorsal and ventral pathways to stereoscopic processing in macaque

eLife ◽  
2021 ◽  
Vol 10 ◽  
Author(s):  
Toshihide W Yoshioka ◽  
Takahiro Doi ◽  
Mohammad Abdolrahmani ◽  
Ichiro Fujita
Keyword(s):  
Single Neuron ◽  
Binocular Disparity ◽  
Single Neurons ◽  
3D Perception ◽  
General Role ◽  
Mt Neurons ◽  
Signal Transformation ◽  
Key Factor ◽  
V4 Neurons

The division of labor between the dorsal and ventral visual pathways has been well studied, but not often with direct comparison at the single-neuron resolution with matched stimuli. Here we directly compared how single neurons in MT and V4, mid-tier areas of the two pathways, process binocular disparity, a powerful cue for 3D perception and actions. We found that MT neurons transmitted disparity signals more quickly and robustly, whereas V4 or its upstream neurons transformed the signals into sophisticated representations more prominently. Therefore, signaling speed and robustness were traded for transformation between the dorsal and ventral pathways. The key factor in this tradeoff was disparity-tuning shape: V4 neurons had more even-symmetric tuning than MT neurons. Moreover, the tuning symmetry predicted the degree of signal transformation across neurons similarly within each area, implying a general role of tuning symmetry in the stereoscopic processing by the two pathways.

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