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Related Concept Videos

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...
Perception01:28

Perception

Perception is a fundamental psychological process that enables individuals to organize, interpret, and consciously experience sensory information. This process is crucial for understanding and interacting with the world around us. It includes both bottom-up and top-down processing, each playing a distinct role in how we perceive our environment.
Bottom-up processing begins at the sensory level, where receptors detect external environmental stimuli. These could include the tactile sensation of...
Perception of Sound Waves01:01

Perception of Sound Waves

The human ear is not equally sensitive to all frequencies in the audible range. It may perceive sound waves with the same pressure but different frequencies as having different loudness. Moreover, the perception of sound waves depends on the health of an individual's ears, which decays with age. The health of one's ears may also be affected by regular exposure to loud noises.
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same frequency...
Perceiving Loudness, Pitch, and Location01:21

Perceiving Loudness, Pitch, and Location

The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by identifying...

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Related Experiment Video

Updated: Jul 10, 2026

Measuring Sensitivity to Viewpoint Change with and without Stereoscopic Cues
08:04

Measuring Sensitivity to Viewpoint Change with and without Stereoscopic Cues

Published on: December 4, 2013

Stereomotion perception for a monocularly camouflaged stimulus.

Kevin R Brooks1, Barbara J Gillam

  • 1School of Psychology, University of New South Wales, Sydney, NSW, Australia. kbrooks@psy.mq.edu.au

Journal of Vision
|November 14, 2007
PubMed
Summary

Monocular camouflage can disrupt normal depth perception cues. This study shows that even with camouflage, the brain can still perceive stereomotion, influenced by visual context.

Area of Science:

  • Visual Neuroscience
  • Perception Psychology
  • Computational Vision

Background:

  • Stereomotion perception typically relies on binocular disparity and inter-ocular velocity differences.
  • These conventional cues can be unavailable when objects are monocularly camouflaged or occluded.
  • Understanding depth perception under degraded visual conditions is crucial for visual system research.

Purpose of the Study:

  • To investigate stereomotion perception when conventional depth cues are compromised by monocular camouflage.
  • To examine how ecological constraints influence the perception of motion in depth under such conditions.

Main Methods:

  • Two experiments were conducted using stimuli with monocularly camouflaged objects.
  • Experiment 1 assessed perceived 3D motion trajectory under lateral translation.

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Last Updated: Jul 10, 2026

Measuring Sensitivity to Viewpoint Change with and without Stereoscopic Cues
08:04

Measuring Sensitivity to Viewpoint Change with and without Stereoscopic Cues

Published on: December 4, 2013

Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition
07:45

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

Published on: July 21, 2020

  • Experiment 2 measured perceived stereomotion speed with varying background complexity.

    • Main Results:

    • Monocular camouflage led to perceived oblique 3D motion trajectories, unlike direct trajectories for matched stimuli.
    • Perceived stereomotion speed was reduced for camouflaged objects compared to matched stimuli.
    • The presence of additional background objects (ecological constraints) restored perceived stereomotion speed.

    Conclusions:

    • The brain can perceive stereomotion even when conventional cues are degraded by monocular camouflage.
    • Perceived motion trajectory and speed are significantly modulated by the surrounding visual environment and binocular geometry.
    • This research provides novel insights into the robustness and adaptability of the human visual system in complex scenarios.