The effects of luminance surrounds on the perception of the color brown

DeLawyer, Tanner; Foote, Katharina G.; Kwong, Courtney; Lin, Tracey; Short, Walker; Suh, Eugene; Buck, Steven L.

doi:10.1167/12.14.36

Cited by 3 publications

(2 citation statements)

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“…However, the present results with blue, green, or red test stimuli show that the surround changes by themselves are not sufficient to produce changes of hue category, hue balance, and direction of rod influence for any hue except yellow/brown. In addition, we have shown elsewhere that bright rings that are remote from the test stimulus are sufficient to shift yellow to brown and change the red-green balance point [1,34,35]. Thus, the surround effects do not rely on simultaneous contrast.…”

Section: Discussionmentioning

confidence: 87%

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Dark versus bright equilibrium hues: rod and cone biases

Buck

DeLawyer

2014

J. Opt. Soc. Am. A

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Equilibrium (unique) red, green, blue, and yellow stimuli look bright in a black surround, but they look dark in a bright white surround, and yellow changes to brown. We investigated differences in equilibrium-hue chromaticity between bright and dark hues to reveal changes in weighting of cone and rod signals. The largest, most consistent shifts were found between yellow and brown, with equilibrium-brown chromaticity shifted toward red compared to equilibrium yellow at both photopic and mesopic levels. Also, at mesopic levels, rod influence reversed for most observers from a green bias for yellow to a red bias for brown. Bright/dark differences for blue, green, and red were much smaller and/or less consistent. Thus, shifts of cone and rod hue biases between bright and dark hues are most prominent in L-M-cone pathways, especially those activated by yellow and brown stimuli.

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Section: Discussionmentioning

confidence: 87%

“…Moreover, brown is found only when it is sufficiently darker than its surroundings, so it is a dark related color [1]. Likewise, yellow is also dependent on being sufficiently bright relative to its surroundings and is the bright related-color counterpart to brown.…”

Section: Introductionmentioning

confidence: 99%

Dark versus bright equilibrium hues: rod and cone biases

Buck

DeLawyer

2014

J. Opt. Soc. Am. A

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Dichoptic perception of brown

2016

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Two experiments assessed mechanisms underlying brown induction by presenting a foveal target disk and concentric annular surround stimuli that varied in contrast relative to larger backgrounds. Stimuli were presented under monocular, binocular, and dichoptic viewing conditions. Observers adjusted the luminance of the target disk to a criterion brown level. We found evidence for at least two separate mechanisms for brown induction: one mechanism that is dependent on physically contiguous contrast and operates in monocular pathways and another mechanism that responds to high luminance contrast anywhere in the visual field and can operate after convergence of signals from the two eyes.

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Contrast-dependent red-green balance shifts depend on S-cone activity

DeLawyer

Tayon

et al. 2018

J. Opt. Soc. Am. A

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Previous research from our lab has established that red-green-balanced yellow targets become greenish-brown as surround luminance increases, while red-green-balanced brown targets become reddish-yellow as surround luminance decreases. To help assess the generality and underlying processes of this contrast-dependent red-green hue shift, we investigated red-green hue shifts for target stimuli that appeared achromatic or blue as well as yellow/brown. Results confirmed that the red-green hue shift was largest for yellow/brown targets and was progressively reduced for achromatic and blue targets as target excitation of S cones increased. The magnitude of the hue shift could be predicted by the S/(L+M) excitation of the target when bright white surrounds are used. The hue shift also requires that the target and surround are presented to the same eye, consistent with processing in monocular pathways. Increased S-cone excitation by the surround was associated with red-green hue shifts for all targets equally. Thus, S-cone signals from bright white surrounds might play a role in the contrast-dependent red-green hue shift, but the source of the variation of the magnitude of the hue shift with variations in target S-cone excitation when presented on those surrounds is unknown.

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The effects of luminance surrounds on the perception of the color brown

Cited by 3 publications

References 0 publications

Dark versus bright equilibrium hues: rod and cone biases

Dark versus bright equilibrium hues: rod and cone biases

Dichoptic perception of brown

Contrast-dependent red-green balance shifts depend on S-cone activity

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