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 Concept Videos

Perceptual Constancy01:12

Perceptual Constancy

532
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...
532
Color Vision01:24

Color Vision

698
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.
698
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

6.5K
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
6.5K
Indicators02:39

Indicators

49.3K
Certain organic substances change color in dilute solution when the hydronium ion concentration reaches a particular value. For example, phenolphthalein is a colorless substance in any aqueous solution with a hydronium ion concentration greater than 5.0 × 10−9 M (pH < 8.3). In more basic solutions where the hydronium ion concentration is less than 5.0 × 10−9 M (pH > 8.3), it is red or pink. Substances such as phenolphthalein, which can be used to determine the pH of a solution, are...
49.3K
Factors Affecting Perception01:25

Factors Affecting Perception

1.8K
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.
An illustrative example of a perceptual set is the scenario where an airline pilot told...
1.8K

You might also read

Related Articles

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

Sort by
Same author

Imagery: Interference, facilitation, and theory.

Attention, perception & psychophysics·2026
Same author

Crowding expands and is less sensitive to target-flanker differences during a shift of visual attention.

Vision research·2023
Same author

Editorial: The future of perceptual illusions: from phenomenology to neuroscience, vol II.

Frontiers in human neuroscience·2023
Same author

Numerosity depends on normalized contrast energy: Review and square-root law model.

Vision research·2023
Same author

Untypical Contrast Normalization Explains the "Weak Outnumber Strong" Numerosity Illusion.

Frontiers in human neuroscience·2022
Same author

Colour constancy failures expected in colourful environments.

Proceedings. Biological sciences·2022
Same journal

Multi-module collaborative optimization-driven fast speckle correlation imaging in variable environments.

Journal of the Optical Society of America. A, Optics, image science, and vision·2026
Same journal

Secrecy performance analysis of NOMA-UWOC systems over a vertically stratified WGG oceanic turbulence channel.

Journal of the Optical Society of America. A, Optics, image science, and vision·2026
Same journal

Backscattering of plane waves in a composite system containing a rough surface and anisotropic scatterers.

Journal of the Optical Society of America. A, Optics, image science, and vision·2026
Same journal

Aspherical surface construction methods based on extended Jacobi polynomials.

Journal of the Optical Society of America. A, Optics, image science, and vision·2026
Same journal

OCT sidelobe suppression method based on dual-path phase sinusoidal modulation and minimum value fusion.

Journal of the Optical Society of America. A, Optics, image science, and vision·2026
Same journal

Optical design concepts using wavelength-selective diffractive optics to enable miniaturized multimodal endoscopic imaging across separated spectral ranges.

Journal of the Optical Society of America. A, Optics, image science, and vision·2026
See all related articles

Related Experiment Video

Updated: Sep 11, 2025

Visualizing Visual Adaptation
04:43

Visualizing Visual Adaptation

Published on: April 24, 2017

9.1K

Five problems with color constancy metrics: discussion.

Adam Reeves

    Journal of the Optical Society of America. A, Optics, Image Science, and Vision
    |August 12, 2025
    PubMed
    Summary
    This summary is machine-generated.

    This study examines five key challenges in understanding color constancy using summary statistics. Addressing these issues is crucial for accurately modeling how humans perceive consistent colors under varying illumination conditions.

    More Related Videos

    A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments
    08:12

    A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments

    Published on: March 1, 2022

    2.6K
    A Two-interval Forced-choice Task for Multisensory Comparisons
    07:13

    A Two-interval Forced-choice Task for Multisensory Comparisons

    Published on: November 9, 2018

    11.0K

    Related Experiment Videos

    Last Updated: Sep 11, 2025

    Visualizing Visual Adaptation
    04:43

    Visualizing Visual Adaptation

    Published on: April 24, 2017

    9.1K
    A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments
    08:12

    A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments

    Published on: March 1, 2022

    2.6K
    A Two-interval Forced-choice Task for Multisensory Comparisons
    07:13

    A Two-interval Forced-choice Task for Multisensory Comparisons

    Published on: November 9, 2018

    11.0K

    Area of Science:

    • Visual perception
    • Color science
    • Computational neuroscience

    Background:

    • Color constancy is the ability of a visual system to perceive the color of an object as relatively constant despite changes in the spectral distribution of the illuminating light.
    • Summary statistics are often used to model color constancy, but several inherent problems limit their effectiveness.

    Purpose of the Study:

    • To identify and discuss five critical problems associated with using summary statistics for color constancy.
    • To highlight areas for improvement in computational models of color perception.

    Main Methods:

    • Conceptual analysis of existing color constancy models.
    • Identification and elaboration of five distinct problem areas: metric choice, chromaticity independence, random matches, bounded color space, and memory reliance.

    Main Results:

    • The choice of metric significantly impacts the accuracy of color constancy calculations.
    • Independence from chromaticity is a challenge, as models may not generalize across different color gamuts.
    • Random matches introduce noise and variability in performance assessment.
    • The bounded nature of color space poses limitations on the range of achievable color perceptions.
    • Reliance on memory introduces further complexity and potential for error in color constancy.

    Conclusions:

    • Summary statistics present significant challenges for accurately modeling color constancy.
    • Further research is needed to develop more robust and comprehensive models of color perception that overcome these limitations.