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    Remodelling colour contrast: implications for visual processing and colour representation

    Shepherd, Alex J. (1999) Remodelling colour contrast: implications for visual processing and colour representation. Vision Research 39 (7), pp. 1329-1345. ISSN 0042-6989.

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    Colour contrast describes the influence of one colour on the perception of colours in neighbouring areas. This study addresses two issues: (i) the accurate representation of the colour changes; (ii) the underlying visual mechanisms. Observers viewed a haploscopic display in which a standard display was presented to one eye and a matching display to the other. The matches could be represented accurately using a diagram that is a logarithmic transformation of the MacLeod–Boynton (r, b) (1979) chromaticity diagram. Since haploscopic presentation has been described as isolating retinal processes (Whittle, P., & Challands, P.D.C. (1969). The effect of background luminance on the brightness of flashes. Vision Research, 9, 1095–1110; Chichilnisky, E.J., & Wandell, B.A. (1995). Photoreceptor sensitivity changes explain color appearance shifts induced by large uniform backgrounds in dichoptic matching. Vision Research, 35, 239–254), the results are discussed in terms of receptor sensitivity changes and the ratio of receptor contrasts.


    Item Type: Article
    School: Birkbeck Faculties and Schools > Faculty of Science > School of Psychological Sciences
    Depositing User: Sarah Hall
    Date Deposited: 18 Feb 2020 08:56
    Last Modified: 02 Aug 2023 17:57


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