Open AccessLine element for the perceptual color space
Author(s) -
Patrick Candry,
Patrick De Visschere,
Kristiaan Neyts
Publication year - 2022
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.468370
Subject(s) - color space , ellipsoid , optics , line (geometry) , contrast (vision) , color vision , artificial intelligence , euclidean space , color difference , physics , computer vision , mathematics , computer science , mathematical analysis , geometry , image (mathematics) , enhanced data rates for gsm evolution , astronomy
It is generally accepted that the perceptual color space is not Euclidean. A new line element for a 3-dimensional Riemannian color space was developed. This line element is based on the Friele line elements and psychophysical color discrimination models, and comprises both the first and second stage of color vision. The line element is expressed in a contrast space based on the MacLeod-Boynton chromaticities. New equations for the contrast thresholds along the cardinal axes and new metric tensor elements were determined. Visual adaptation effects were incorporated into the model. Color discrimination threshold ellipsoids were calculated with the new line element. Adequate agreement with experimental threshold ellipsoids reported in literature was demonstrated. From a comparison with other color difference metrics a better overall predictability of threshold ellipsoids was found with the new line element.