skip to main content
Language:
Search Limited to: Search Limited to: Resource type Show Results with: Show Results with: Search type Index

Chromatic illumination discrimination ability reveals that human colour constancy is optimised for blue daylight illuminations

PloS one, 2014-02, Vol.9 (2), p.e87989-e87989 [Peer Reviewed Journal]

COPYRIGHT 2014 Public Library of Science ;COPYRIGHT 2014 Public Library of Science ;2014 Pearce et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License: http://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;2014 Pearce et al 2014 Pearce et al ;ISSN: 1932-6203 ;EISSN: 1932-6203 ;DOI: 10.1371/journal.pone.0087989 ;PMID: 24586299

Full text available

Citations Cited by
  • Title:
    Chromatic illumination discrimination ability reveals that human colour constancy is optimised for blue daylight illuminations
  • Author: Pearce, Bradley ; Crichton, Stuart ; Mackiewicz, Michal ; Finlayson, Graham D ; Hurlbert, Anya
  • Osorio, Daniel
  • Subjects: Adult ; Biology ; Chromaticity ; Color ; Color matching ; Color Perception - physiology ; Computer Science ; Daylight ; Discrimination, Psychological - physiology ; Experiments ; Female ; Human performance ; Humans ; Illumination ; Light ; Loci ; Male ; Mathematics ; Medicine ; Neurosciences ; Optics ; Retina ; Science ; Social and Behavioral Sciences ; Surface matching ; Visual cortex ; Visual discrimination ; Visual perception ; Visual system ; Young Adult
  • Is Part Of: PloS one, 2014-02, Vol.9 (2), p.e87989-e87989
  • Description: The phenomenon of colour constancy in human visual perception keeps surface colours constant, despite changes in their reflected light due to changing illumination. Although colour constancy has evolved under a constrained subset of illuminations, it is unknown whether its underlying mechanisms, thought to involve multiple components from retina to cortex, are optimised for particular environmental variations. Here we demonstrate a new method for investigating colour constancy using illumination matching in real scenes which, unlike previous methods using surface matching and simulated scenes, allows testing of multiple, real illuminations. We use real scenes consisting of solid familiar or unfamiliar objects against uniform or variegated backgrounds and compare discrimination performance for typical illuminations from the daylight chromaticity locus (approximately blue-yellow) and atypical spectra from an orthogonal locus (approximately red-green, at correlated colour temperature 6700 K), all produced in real time by a 10-channel LED illuminator. We find that discrimination of illumination changes is poorer along the daylight locus than the atypical locus, and is poorest particularly for bluer illumination changes, demonstrating conversely that surface colour constancy is best for blue daylight illuminations. Illumination discrimination is also enhanced, and therefore colour constancy diminished, for uniform backgrounds, irrespective of the object type. These results are not explained by statistical properties of the scene signal changes at the retinal level. We conclude that high-level mechanisms of colour constancy are biased for the blue daylight illuminations and variegated backgrounds to which the human visual system has typically been exposed.
  • Publisher: United States: Public Library of Science
  • Language: English
  • Identifier: ISSN: 1932-6203
    EISSN: 1932-6203
    DOI: 10.1371/journal.pone.0087989
    PMID: 24586299
  • Source: Open Access: PubMed Central
    PLoS (Open access)
    AUTh Library subscriptions: ProQuest Central
    GFMER Free Medical Journals
    MEDLINE
    DOAJ Directory of Open Access Journals
Back to results list
INSPIRE LIBRARY - TON DUC THANG UNIVERSITY (84-028) 37 755 057 Feedback
19 Nguyen Huu Tho St. Dist.7, HCM thuvien@tdtu.edu.vn

Copyright © 2017 INSPIRE LIBRARY - TON DUC THANG UNIVERSITY

Searching Remote Databases, Please Wait