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Apparent surface curvature affects lightness perception.

D C Knill1, D Kersten

  • 1Department of Psychology, University of Minnesota, Minneapolis 55455.

Nature
|May 16, 1991
PubMed
Summary
This summary is machine-generated.

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Perceived surface curvature influences lightness perception, challenging models that assume independent visual processing. This suggests smooth luminance variations are interpreted based on surface attributes.

Area of Science:

  • Visual perception
  • Computational neuroscience
  • Psychophysics

Background:

  • The human visual system accurately perceives surface lightness despite variations in luminance due to shape and illumination.
  • Current models often propose early sensory mechanisms for lightness perception, independent of other scene attribute estimations.

Purpose of the Study:

  • To investigate whether perceived surface curvature influences perceived lightness.
  • To challenge the modularity assumption in lightness perception models.

Main Methods:

  • Experimental manipulation of perceived surface curvature.
  • Assessment of its impact on perceived lightness.

Main Results:

  • Perceived surface curvature was shown to significantly affect perceived lightness.

Related Experiment Videos

  • This finding extends previous observations where higher-order percepts influenced lightness.

    • Conclusions:

    • Lightness perception is not solely based on early sensory input but is influenced by interpretations of surface attributes, including curvature.
    • Smooth luminance variations are interpreted in the context of perceived scene properties, affecting lightness perception.