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Related Concept Videos

Perceptual Constancy01:12

Perceptual Constancy

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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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Depth Perception and Spatial Vision01:15

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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.
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Gestalt Principles of Perception01:21

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Gestalt principles provide a framework for understanding how humans perceive objects as unified wholes within their context. These principles are essential in explaining the cognitive processes that make sense of complex visual stimuli by organizing them into coherent groups. One fundamental principle is proximity, which posits that objects located close to each other are perceived as a collective group. For instance, when dots are positioned near one another, the visual system interprets them...
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Color Vision01:24

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Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
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Factors Affecting Perception01:25

Factors Affecting Perception

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Perception is influenced by perceptual set, context, motivation, and emotion. Perceptual set, or perceptual expectancy, refers to the tendency to perceive things in a particular way, influenced by previous experiences and expectations. This phenomenon affects the interpretation of stimuli, creating a set of mental tendencies and assumptions that impact sensory perceptions of sound, taste, touch, and sight.
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Vision01:24

Vision

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Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
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Measuring Sensitivity to Viewpoint Change with and without Stereoscopic Cues
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Color Constancy in Two-Dimensional and Three-Dimensional Scenes: Effects of Viewing Methods and Surface Texture.

Takuma Morimoto1, Yoko Mizokami2, Hirohisa Yaguchi3

  • 1University of Oxford, UK.

I-Perception
|December 15, 2017
PubMed
Summary
This summary is machine-generated.

Color constancy, the ability to perceive object colors despite changes in illumination, is better in 3-D scenes. Viewing 2-D images with 3-D cues improves this effect, with surface texture playing a key role.

Keywords:
3-D perceptionadaptationcolorconstancyobject recognition

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Area of Science:

  • Visual perception
  • Color science
  • Computational neuroscience

Background:

  • Color constancy is crucial for object recognition.
  • Debate exists regarding superior color constancy in three-dimensional (3-D) versus two-dimensional (2-D) scenes.
  • Specific visual cues contributing to this difference remain unclear.

Purpose of the Study:

  • To investigate the factors influencing color constancy differences between 3-D and 2-D scenes.
  • To determine the impact of viewing methods on color constancy in 2-D representations.
  • To elucidate the role of surface texture in color constancy.

Main Methods:

  • Comparison of color constancy in a 3-D miniature room versus 2-D images of the room.
  • Utilized binocular viewing, monocular viewing, and head movement as viewing methods for 2-D images.
  • Assessed the perceptual three-dimensional (3-D) effect of each viewing method.
  • Conducted an experiment with and without surface texture on scene objects.

Main Results:

  • Color constancy was significantly better in the 3-D miniature room compared to 2-D images.
  • Color constancy for 2-D images improved when viewing methods enhanced the perception of three-dimensionality (3-D).
  • Surface texture of objects was identified as a contributing factor to enhanced color constancy.

Conclusions:

  • The enhanced color constancy in 3-D scenes is influenced by the degree of perceived three-dimensionality (3-D).
  • Viewing techniques that simulate 3-D perception can improve color constancy for 2-D images.
  • Surface texture is an important cue for achieving robust color constancy.