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The local border mechanism in grating induction.

B Moulden1, F Kingdom

  • 1Department of Psychology, University of Western Australia, Nedlands, Perth.

Vision Research
|January 1, 1991
PubMed
Summary
This summary is machine-generated.

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Brightness contrast phenomena, like White's effect and grating induction, can be explained by a model incorporating both local and cortical mechanisms. This study presents a novel model using averaged outputs from local spatial filters at multiple scales.

Area of Science:

  • Visual perception
  • Computational neuroscience
  • Psychophysics

Background:

  • Brightness contrast phenomena, including White's effect and grating induction, are central to understanding visual processing.
  • Existing models often focus exclusively on either local (e.g., retinal) or cortical mechanisms, creating a dichotomy.
  • A comprehensive model likely requires integrating mechanisms operating at different spatial scales.

Purpose of the Study:

  • To present novel variations of brightness induction effects.
  • To propose and evaluate a computational model that explains these effects using local spatial filters.
  • To demonstrate the model's ability to account for both new and existing findings in visual induction.

Main Methods:

  • Development of a computational model based on local spatial filters operating at multiple scales.

Related Experiment Videos

  • Averaging the outputs of these filters to simulate neural processing.
  • Presentation of novel visual stimuli designed to test specific aspects of brightness contrast.

    • Main Results:

    • The proposed model successfully explains novel brightness induction effects.
    • The model accounts for previously reported results concerning spatial parameter manipulations in induction displays.
    • Demonstration that a model based solely on local spatial filters can explain complex visual phenomena.

    Conclusions:

    • A unified model incorporating local spatial filtering at multiple scales can adequately explain brightness contrast phenomena.
    • The dichotomy between local and cortical mechanisms in existing models may be unnecessary.
    • This approach offers a parsimonious explanation for a range of visual induction effects.