Time-dependent changes of rod influence on hue perception

Knight, Roger; Buck, Steven L.

doi:10.1016/s0042-6989(02)00087-1

Cited by 19 publications

(34 citation statements)

References 29 publications

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“…Small-bistratified pathways mediate the rod blue bias and rod red bias found at short wavelengths. Our psychophysical results [10][11][12] imply that the midget-mediated rod green bias is faster-acting and found over a wider range of light levels than the small-bistratifiedmediated rod blue and SW-red biases.…”

Section: Possible Substratementioning

confidence: 65%

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What is the hue of rod vision?

Buck

2000

Color Res. Appl.

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Textbooks say rod vision is colorless. However, evidence that rod signals influence hue comes from several lines of psychophysical studies, including scotopic color contrast, color matching, hue scaling, and unique-hue loci. Some widely cited early studies suggested that there is a single rod hue, which is blue. Other studies have suggested that various other hues, or even all hues, can be associated with rod stimulation. This article presents a conceptual framework that helps reconcile many of these findings and that involves two unifying generalizations. (1) Rod signals are associated with signals from all three cone types and have a ubiquitous influence on all portions of the color pathways.(2) But rod signals have multiple inherent biases (differential weightings) in their effects on color pathways, and the "net effect" of these individual biases is often found to be blue. The multiple rod influences on hue, and their net blue influence, may have a basis in the parallel pathways that are the retinal substrate of color vision.

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Section: Possible Substratementioning

confidence: 65%

“…[10][11][12] The common feature of all these procedures that allows them to isolate separate rod influences is their use of narrow-band stimuli. This permits separation of rod influences in different spectral regions that can be further distinguished by means of differences in temporal or intensity dependence.…”

Section: Separation Of Rod Influences On Huementioning

confidence: 99%

What is the hue of rod vision?

Buck

2000

Color Res. Appl.

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“…Prior testing has confirmed that this bleaching flash is sufficient to extend the cone plateau and yield stable hue percepts for at least 8 minutes~Knight & Buck, 2002!. The flash unit, energy, and bleach size used here are identical to those used in prior studies that demonstrated rod hue biases with larger, peripheral stimuli~Buck et al, 2000; Buck & Knight, 2003;Knight & Buck, 2002;Thomas & Buck, 2004!. However, the extremely brief duration of the flash precludes our measurement of spectral radiance and calculation of color temperature, retinal illuminance, or pigment bleaching.…”

Section: Bleached Conditionmentioning

confidence: 74%

Do rods influence the hue of foveal stimuli?

et al. 2006

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To understand the generality and mechanisms of previously reported rod hue biases, we examined whether they are present for small foveal stimuli by comparing the wavelengths of the three spectral unique hues under dark-adapted and flash-bleached conditions. Rod green bias~shift of unique yellow! and rod blue bias~shift of unique green! were found for some observers with 18-diameter foveal stimuli, the size most likely to stimulate rods. Smaller stimuli~0.28 and 0.68 diameter!, which were least likely to stimulate rods, produced no large or consistent differences between dark-adapted and bleached conditions. This suggests that rod hue biases result from the local stimulation of rods by light, not from remote suppression by dark-adapted, unstimulated rods, and not from bleaching light artifacts.

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“…These rod influences appear to fall into at least two categories: a "faster" enhancement of green, and a "slower" enhancement of blue and short-wavelength red (SW red). 7,8 We have previously shown that a probe-flash paradigm is effective in revealing both types of rod influence on hue. 7,8 In this paradigm, hue-scaling 9 is used to judge the hue appearance of a brief test probe presented with different delays after the onset of a background flash.…”

Section: Introductionmentioning

confidence: 99%

“…7,8 We have previously shown that a probe-flash paradigm is effective in revealing both types of rod influence on hue. 7,8 In this paradigm, hue-scaling 9 is used to judge the hue appearance of a brief test probe presented with different delays after the onset of a background flash. The "faster" rod influence manifests itself immediately after background onset and does not change with continued stimulation by the background.…”

Section: Introductionmentioning

confidence: 99%

Rod influences on hue perception: Effect of background light level

Knight¹,

Buck²

2000

Color Res. Appl.

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Rod signals interact with red-green and blueyellow perceptual hue dimensions to influence color appearance across the spectrum. Hue-naming studies from our lab have identified at least two rod-mediated mechanisms with different spectral and temporal properties: (1) a "faster" rod influence enhances green relative to red; and (2) a "slower" rod influence enhances short-wavelength red and blue. These two types of rod influence are revealed by a probe-flash paradigm . In the present study, we examine the effects of background light level on "faster" and "slower" rod mechanisms. We find both rod influences at higher light levels, but only the "faster" influence at lower light levels. These data provide additional support for the existence of two types of rod influence on hue that differ from each other in spectral specificity, temporal properties, and light-level dependence.

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Time-dependent changes of rod influence on hue perception

Cited by 19 publications

References 29 publications

What is the hue of rod vision?

What is the hue of rod vision?

Do rods influence the hue of foveal stimuli?

Rod influences on hue perception: Effect of background light level

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