Three experiments investigated the role of physical illumination on lightness perception in simultaneous lightness contrast (SLC). Four configurations were employed: the classic textbook version of the illusion and three configurations that produced either enhanced or reduced SLC. Experiment 1 tested the effect of ambient illumination on lightness perception. It simulated very dark environmental conditions that nevertheless still allowed perception of different shades of gray. Experiment 2 tested the effect of the intensity of Gelb lighting on lightness perception. Experiment 3 presented two conditions that integrated illumination conditions from Experiments 1 and 2. Our results demonstrated an illumination effect on both lightness matching and perceived SLC contrast: As the intensity of illumination increased, the target on the black background appeared lighter, while the target on the white background was little affected. We hypothesize the existence of two illumination ranges that affect lightness perception differently: low and normal. In the low range, the SLC contrast was reduced and targets appeared darker. In the normal range, the SLC contrast and lightness matchings for each background were little changed across illumination intensities

Zavagno, D., Daneyko, O., & Liu, Z. (2018). The Influence of Physical Illumination on Lightness Perception in Simultaneous Contrast Displays. I-PERCEPTION, 9(4), 1-22 [10.1177/2041669518787212].

The Influence of Physical Illumination on Lightness Perception in Simultaneous Contrast Displays

Zavagno, D
Primo
;
2018

Abstract

Three experiments investigated the role of physical illumination on lightness perception in simultaneous lightness contrast (SLC). Four configurations were employed: the classic textbook version of the illusion and three configurations that produced either enhanced or reduced SLC. Experiment 1 tested the effect of ambient illumination on lightness perception. It simulated very dark environmental conditions that nevertheless still allowed perception of different shades of gray. Experiment 2 tested the effect of the intensity of Gelb lighting on lightness perception. Experiment 3 presented two conditions that integrated illumination conditions from Experiments 1 and 2. Our results demonstrated an illumination effect on both lightness matching and perceived SLC contrast: As the intensity of illumination increased, the target on the black background appeared lighter, while the target on the white background was little affected. We hypothesize the existence of two illumination ranges that affect lightness perception differently: low and normal. In the low range, the SLC contrast was reduced and targets appeared darker. In the normal range, the SLC contrast and lightness matchings for each background were little changed across illumination intensities
Articolo in rivista - Articolo scientifico
Scientifica
Gelb lighting; illumination; light; lightness constancy; lightness matching; lightness/brightness; simultaneous lightness contrast; Experimental and Cognitive Psychology; Ophthalmology; Sensory Systems; Artificial Intelligence
English
Zavagno, D., Daneyko, O., & Liu, Z. (2018). The Influence of Physical Illumination on Lightness Perception in Simultaneous Contrast Displays. I-PERCEPTION, 9(4), 1-22 [10.1177/2041669518787212].
Zavagno, D; Daneyko, O; Liu, Z
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10281/209068
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