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Related Experiment Video

Updated: Jul 20, 2026

Stereoacuity Improvement using Random-Dot Video Games

Stereoacuity Improvement using Random-Dot Video Games

Published on: January 14, 2020

Amodal completion with background determines depth from monocular gap stereopsis.

Philip M Grove¹, W L Ben Sachtler, Barbara J Gillam

¹School of Psychology, University of New South Wales, Sydney, NSW 2052, Australia. p.grove@psy.uq.edu.au

Vision Research

|August 30, 2006

Summary

Perceived depth from monocular gaps is reduced by non-matching background elements. However, placing elements stereoscopically in front of the gap restores depth perception, allowing for amodal completion.

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Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition

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Area of Science:

Vision Science
Perceptual Psychology
Computational Neuroscience

Background:

Previous research indicates that perceived depth in monocular gap stereograms is diminished when the monocular gap's color or texture differs from the background.
The continuation of the gap with the background appears crucial for perceiving depth steps within binocular surfaces.

Purpose of the Study:

To investigate the role of background continuation in perceived depth using monocular gap stimuli.
To test whether stereoscopically placed elements near the gap influence depth perception.

Main Methods:

Utilized a conventional monocular gap stereogram with two grey rectangles separated by a gap in one eye.
Compared perceived depth at the gap with and without two small black squares placed at the gap's ends.
Varied the stereoscopic depth of the squares relative to the rectangle/gap configuration.

Main Results:

Stereoscopically placed squares appearing behind the configuration (on the background) interfered with perceived depth at the gap.
When squares were placed stereoscopically in front of the configuration, this depth attenuation disappeared.
The gap and background were able to amodally complete under these conditions.

Conclusions:

The visual system's interpretation of monocular gaps for depth perception is sensitive to background congruence.
Stereoscopic placement of foreground elements can override disruptive background cues, facilitating amodal completion and preserving perceived depth.