Wide gamut lighting and color contrast in anomalous trichromacy

Paper


Joyce, Daniel, Whitehead, Lorne A. and Webster, Michael A.. 2021. "Wide gamut lighting and color contrast in anomalous trichromacy." SPIE Optical Engineering + Applications 2021. California, United States 01 - 05 Aug 2021 United States. SPIE. https://doi.org/10.1117/12.2594334
Paper/Presentation Title

Wide gamut lighting and color contrast in anomalous trichromacy

Presentation TypePaper
AuthorsJoyce, Daniel, Whitehead, Lorne A. and Webster, Michael A.
Journal or Proceedings TitleProceedings of SPIE (International Society for Optical Engineering)
Journal Citation11814
Number of Pages5
Year2021
PublisherSPIE
Place of PublicationUnited States
ISSN0277-786X
ISBN9781510644663
9781510644670
Digital Object Identifier (DOI)https://doi.org/10.1117/12.2594334
Web Address (URL) of Paperhttps://www.spiedigitallibrary.org/conference-proceedings-of-spie/11814/2594334/Wide-gamut-lighting-and-color-contrast-in-anomalous-trichromacy/10.1117/12.2594334.short?SSO=1
Web Address (URL) of Conference Proceedingshttps://www.spiedigitallibrary.org/conference-proceedings-of-spie/11814.toc#FrontMatterVolume11814
Conference/EventSPIE Optical Engineering + Applications 2021
Event Details
SPIE Optical Engineering + Applications 2021
Parent
SPIE - The International Society for Optical Engineering
Delivery
In person
Event Date
01 to end of 05 Aug 2021
Event Location
California, United States
Abstract

LED lighting provides considerable flexibility for shaping the light spectrum for different applications, including increasing the color gamut. While the spectra are typically designed for their effects on observers with normal color vision, the chosen spectra could also enhance color perception in color-deficient observers (Tamura et al. 2015, 2017), and could potentially emulate the effects of filter aids for color deficiencies. We examined the consequences of typical or wide-gamut luminaires for color deficient observers. Protanomalous and deuteranomalous individuals have altered L- or M-cone spectral sensitivities that result in a compression of the color contrasts along the L vs. M axis of cone-opponent space. Light sources designed to increase these contrasts would thus be expected to amplify the L vs. M signals for color-deficient observers. We modeled the effects of different luminaires on color contrast for normal trichromats and protanomalous or deuteranomalous observers. For this we notionally illuminated the spectral reflectances of Munsell surfaces that were selected to yield a uniform circle of 36 hues in a cone-opponent space under an equal energy white luminaire for a color normal trichromatic observer. We then illuminated these surfaces with typical illuminants and the Rec.2020 UHDTV wide color gamut standard to evaluate chromatic contrast for color-anomalous observers and normal trichromats. The results illustrate the potential for modern wide-gamut light sources to enhance color contrast for anomalous trichromats.

Keywordsanomalous trichromacy; color; lighting; color rendering; LED
ANZSRC Field of Research 2020520406. Sensory processes, perception and performance
321204. Vision science
Public Notes

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SeriesProceedings of SPIE
Byline AffiliationsUniversity of Nevada, United States
University of British Columbia, Canada
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