Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Size constancy, depth constancy and vertical disparities: a further quantitative interpretation

P O Bishop1

  • 1Department of Anatomy and Histology, University of Sydney, New South Wales, Australia.

Biological Cybernetics
|January 1, 1994
PubMed
Summary

This study explains how the brain uses eye vergence cues to perceive size and depth constancy at near distances. It proposes a neural model where visual cortex cells process disparities for accurate egocentric distance perception.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Stereoscopic depth perception and vertical disparity: neural mechanisms.

Vision research·1996
Same author

Can random-dot stereograms serve as a model for the perception of depth in relation to real three-dimensional objects?

Vision research·1996
Same author

Vertical disparity, egocentric distance and stereoscopic depth constancy: a new interpretation.

Proceedings of the Royal Society of London. Series B, Biological sciences·1989
Same author

Stereoscopic mechanisms: binocular responses of the striate cells of cats to moving light and dark bars.

Proceedings of the Royal Society of London. Series B, Biological sciences·1986
Same author

End-stopped cells and binocular depth discrimination in the striate cortex of cats.

Proceedings of the Royal Society of London. Series B, Biological sciences·1986
Same author

Neural mechanisms of binocular vision.

Vision research·1986

Area of Science:

  • Neuroscience
  • Visual Perception
  • Computational Neuroscience

Background:

  • Size and depth constancies are crucial for visual perception, particularly at near distances (< 2m).
  • Existing models often overlook the role of vergence as the sole distance cue in static conditions.

Purpose of the Study:

  • To propose a neural model explaining the mechanisms of size and depth constancies.
  • To elucidate the role of extraocular muscle innervation and corollary discharge in egocentric distance perception.
  • To describe how vertical and horizontal disparities are processed in the visual cortex.

Main Methods:

  • A two-stage neural process model is proposed, starting in the lateral geniculate nuclei and proceeding to the visual cortex.
  • The model incorporates compensatory adjustments to retinal images and processing of vertical and horizontal disparities.

Related Experiment Videos

  • It utilizes a multiplicative process in the visual cortex to link retinal disparity to egocentric distance.

    • Main Results:

    • The model explains how vergence information, via corollary discharge, informs egocentric distance.
    • It demonstrates how vertical disparities are converted to horizontal disparities in the visual cortex.
    • A quadratic relationship between horizontal retinal disparity and egocentric distance is mathematically described.

    Conclusions:

    • The proposed neural mechanisms adequately describe the operation of size and depth constancies.
    • The model highlights the importance of the induced effect and disparity processing in visual perception.
    • This framework provides a basis for understanding near-distance visual spatial awareness.