Asymmetrical contrast effects induced by luminance and color configurations. - Ecole Nationale du Génie de l'Eau et de l'Environnement de Strasbourg Accéder directement au contenu
Article Dans Une Revue Perception and Psychophysics Année : 2001

Asymmetrical contrast effects induced by luminance and color configurations.

Résumé

In the two experiments, the use of a psychophysical procedure of brightness/darkness cancellation shed light on interactions between spatial arrangement and figure-ground contrast in the perceptual filling in of achromatic and colored surfaces. Achromatic and chromatic Kanizsa squares with varying contrast, contrast polarity, and inducer spacing were used to test how these factors interact in the perceptual filling in of surface brightness or darkness. The results suggest that the neuronal processing of surfaces with apparent contrast, leading to figure-ground segregation (i.e., perceptual organization), is governed by mechanisms that integrate both luminance contrast and spatial information carried by the inducing stimuli, while discarding information on contrast polarity or color. The findings are discussed in relation to earlier observations on brightness assimilation and contrast. They support theories of nonantagonistic neural mechanisms suppressing local contrast or color signs in brightness-based figure-ground percepts. Such mechanisms might be necessary to cancel potentially conflicting polarities in geometrically complex visual stimuli so that perceptual filling in resulting in the most plausible representation of figure and ground can be achieved.
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hal-02168834 , version 1 (29-06-2019)

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  • HAL Id : hal-02168834 , version 1
  • PUBMED : 11766949

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Birgitta Dresp, S Fischer. Asymmetrical contrast effects induced by luminance and color configurations.. Perception and Psychophysics, 2001, 63 (7), pp.1262-70. ⟨hal-02168834⟩
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