Protanopic observers show nearly normal color constancy with natural reflectance spectra

Rigmor C. Baraas, David H. Foster, Kinjiro Amano, Sérgio M C Nascimento

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The ability of color-deficient observers to discriminate between illuminant changes and surface-reflectance changes in a scene was tested with natural and Munsell reflectance spectra. To avoid the confounding effects of spatial structure, stimuli were simulations of Mondrian-like colored patterns, presented on a computer-controlled color monitor. Protanopes performed less well than normal trichromats, regardless of the type of reflectance spectra, but they were least disadvantaged with patterns comprising reflectance spectra drawn from urban and rural scenes, more characteristic of the natural environment.
    Original languageEnglish
    Pages (from-to)347-351
    Number of pages4
    JournalVisual Neuroscience
    Volume21
    Issue number3
    DOIs
    Publication statusPublished - May 2004

    Keywords

    • Color constancy
    • Cone-excitation ratios
    • Natural reflectance spectra
    • Protanopes
    • Surface-color judgments

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