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Related Experiment Videos

Steerable autoencoders underlying remapping, spatiotopy, and visual stability.

Patrick Cavanagh1, David Melcher2

  • 1Centre for Vision Research, York University, Toronto, ON, M3J1P3, Canada; Department of Psychology, Glendon College, Toronto, ON, M4N3M6, Canada; Psychological and Brain Sciences, Dartmouth College, Hanover, NH, 03755, USA.

Current Opinion in Neurobiology
|May 19, 2026
PubMed
Summary
This summary is machine-generated.

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Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
Perceptual Constancy01:12

Perceptual Constancy

Perceptual constancy is the ability to recognize that objects remain consistent and unchanged even when their appearance varies due to changes in sensory input. There are four main types of perceptual constancy: size constancy, shape constancy, color constancy, and brightness constancy.
Size constancy is the recognition that an object remains the same size, even when its image on the retina changes. For instance, a bus is perceived to be large enough to carry people, even if it looks tiny from...

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The visual system uses retinotopic maps, not world coordinates, for location encoding. A novel steerable autoencoder network updates attended target locations on these maps, explaining how we perceive objects across eye movements (trans-saccadic integration).

Area of Science:

  • Neuroscience
  • Computational Neuroscience
  • Visual Perception

Background:

  • The visual system encodes spatial information using retinotopic representations, not world coordinates (spatiotopy).
  • Existing models suggest target tracking and remapping on retinotopic maps, coupled with motion response suppression, to maintain spatial awareness during eye movements.

Purpose of the Study:

  • To propose a novel mechanism for trans-saccadic integration within the visual system.
  • To explain how object identity is linked to updated locations on retinotopic maps after saccades.

Main Methods:

  • Review of existing theories on spatiotopy and retinotopic mapping.
  • Proposal of a computational model involving a steerable autoencoder network.
  • Analysis of how this network facilitates feature activity shifts with eye movements.

Related Experiment Videos

Main Results:

  • The proposed steerable autoencoder network dynamically shifts feature activity to a target's new location on retinotopic maps following saccades.
  • This mechanism explains the phenomenon of trans-saccadic integration, where object continuity is perceived across eye movements.
  • The autoencoder links target identity with its updated spatial features in early visual cortex.

Conclusions:

  • A steerable autoencoder network offers a unified explanation for retinotopic updating and trans-saccadic integration.
  • This model integrates target tracking, remapping, and feature binding within the visual system's architecture.
  • The proposed mechanism accounts for maintaining object awareness despite continuous shifts in retinal input.