Modelling contrast sensitivity for chromatic temporal modulations

X. Kong, M.R. Bueno Perez, I.M.L.C. Vogels, Dragan Sekulovski, I.E.J. Heynderickx

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

The temporal contrast sensitivity to isoluminant chromatic flicker was measured for three observers using the method of adjustment. The isoluminant stimuli were created for each observer individually, based on a technique similar to heterochromatic flicker photometry. The chromatic flicker stimuli were sinusoidal modulations, defined in the CIE 1976 UCS (u', v') chromaticity diagram. The chromaticity varied around a base color along a certain modulation direction with a certain amplitude at a certain frequency. Nine base colors, four modulation directions and seven frequencies were used, resulting in thirty-six temporal contrast sensitivity curves per observer. An exponential model was fitted to the resulting contrast sensitivity expressed as 1/Δ(u', v'), 1/ΔLMS and 1/Δlms. The model resulted in an average R2 value higher than 0.93 for the three different measures of contrast sensitivity. The two parameters of the model (i.e. the slope β1 and intercept β0) were found to significantly depend on the base color and direction of the chromatic modulation. This means that Δ(u', v'), ΔLMS and Δlms are not suitable measures to predict the sensitivity to temporal chromatic modulations in different locations of the color space.
Original languageEnglish
Title of host publicationColor and Imaging Conference, 26th Color and Imaging Conference Final Program and Proceedings
PublisherSociety for Imaging Science and Technology (IS&T)
Pages324-329
Number of pages6
ISBN (Electronic)9780892083374
DOIs
Publication statusPublished - 12 Nov 2018
EventTwenty-sixth Color and Imaging Conference - Pinnacle Hotel , Vancouver, Canada
Duration: 12 Nov 201816 Nov 2018
https://www.imaging.org/site/IST/Conferences/Color_and_Imaging/IST/Conferences/CIC/CIC_Home.aspx

Conference

ConferenceTwenty-sixth Color and Imaging Conference
Abbreviated titleCIC26
CountryCanada
CityVancouver
Period12/11/1816/11/18
Internet address

Keywords

  • Color perception
  • contrast sensitivity

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