Afterimages and Induced Colors Have the Same Hue: Implications for Discounting Illuminants

Livitz, Gennady; Riesen, Guillaume; Shepard, Timothy G.; Mingolla, Ennio; Eskew, Rhea T.

doi:10.1167/16.12.1145

Cited by 2 publications

(2 citation statements)

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“…The only exception was the yellow category, which is close to the -S pole of DKL-space. This observation is in line with the observation of Livitz et al (2016) that induced colours along the S-axis might not be exactly complementary.…”

Section: Resultssupporting

confidence: 91%

“…It has been shown with simple simultaneous contrast displays that the colours induced by simultaneous contrast are complementary, that is, opponent to the inducing colours of the background as predicted by second-stage mechanisms (e.g., Klauke & Wachtler, 2015). However, another recent study (Livitz, Riesen, Shepard, Mingolla, & Eskew, 2016) provided contradictory results. Those previous studies used simple simultaneous contrast displays with two uniform colour areas.…”

Section: Colour Namingmentioning

confidence: 99%

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Determinants of Colour Constancy and the Blue Bias

2017

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We investigated several sensory and cognitive determinants of colour constancy across 40 illumination hues. In the first experiment, we measured colour naming for the illumination and for the colour induced by the illumination on the colorimetric grey. Results confirmed that the induced colours are approximately complementary to the colour of the illumination. In the second experiment, we measured colour constancy using achromatic adjustments. Average colour constancy was perfect under the blue daylight illumination and decreased in colour directions away from the blue daylight illumination due to undershooting and a strong blue bias. Apart from this blue bias, colour constancy was not related to illumination discrimination and to chromatic detection measured previously with the same setup and stimuli. We also observed a strong negative relationship between the degree of colour constancy and the consensus of naming the illumination colour. Constancy coincided with a low naming consensus, in particular because bluish illumination colours were sometimes seen as achromatic. Blue bias and category consensus alone explained >68%, and all determinants together explained >94% of the variance of achromatic adjustments. These findings suggest that colour constancy is optimised for blue daylight.

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Section: Resultssupporting

confidence: 91%

Section: Colour Namingmentioning

confidence: 99%