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Related Experiment Videos

Adaptation and color matching.

Q Zaidi

    Vision Research
    |January 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

    Color vision linearity fails at short wavelengths, suggesting post-receptoral interactions, not pre-receptoral issues, cause this visual system nonlinearity.

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    Area of Science:

    • Vision science
    • Color perception
    • Photoreception

    Background:

    • Crawford's (1965) experiment suggested a failure of linearity in color vision.
    • This nonlinearity was observed when comparing maximum saturation color matches to Maxwell matches.

    Purpose of the Study:

    • To test the implication of Crawford's experiment regarding linearity failure in color matching.
    • To investigate the source of nonlinearity in short-wavelength color perception.

    Main Methods:

    • Maximum saturation color matches were performed with and without a desaturating monochromatic light.
    • This method aimed to isolate potential pre-receptoral or computational artifacts.

    Main Results:

    • A nonlinearity in color matching was measured specifically for short wavelengths.

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  • This nonlinearity was detected even when potential artifacts from Crawford's design were excluded.

    • Conclusions:

    • The observed nonlinearity is likely caused by post-receptoral interactions within the visual system.
    • The findings do not support a failure of spectral invariance or the involvement of more than three photopigments.