Color identification data obtained from photopic to mesopic illuminance levels

Ishida, Taiichiro

doi:10.1002/col.10065

Cited by 21 publications

(17 citation statements)

References 16 publications

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“…In this section we analyse whether these differences can be perceived by a receiver, for example a starling male. Colour perception and acuity of colour discrimination depends on illumination (ISHIDA 2002;LIND & KELBER 2009). At illumination levels above 10 cd/m 2 (64 lx) the cones primarily define the luminance or brightness of a light or surface.…”

Section: Light Conditions In Cavities and Nest-boxes With Reference Tmentioning

confidence: 98%

Is UV and blue-green egg colouration a signal in cavity-nesting birds?

Węgrzyn

Leniowski

Rykowska

et al. 2011

Ethology Ecology & Evolution

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We analysed the eggs of the European starling Sturnus vulgaris for variability of UV and blue-green colouration. We noted the calcium deposition in eggshells, egg measurements, light conditions in nests and starling eye properties. Egg colouration shows high within-clutch similarity. Intensity of the blue-green egg colour neither depends on Ca deposition in the eggshell nor correlates with egg measurements, clutch size and laying date. This suggests that the intensity of the blue-green colour of starling eggs does not reflect female condition, which is reported to affect egg and clutch parameters. Low light intensity in cavities enables only mesopic vision, which is characterised by degraded visual acuity and colour sense, as well as Purkinje shift. As a consequence, the probability of precise assessment of the differences in eggs colour by starling males, crucial for the signalling hypothesis (MORENO & OSORNO 2003), is not high. On the other hand, irrespective of its intensity, blue-green is the last colour visible under decreased illumination. Thus such coloured eggs may attract higher parental attention in dark cavities. We also demonstrated a strong negative correlation between intensity of blue-green and UV colouration of starling eggs, as well as constrained sensitivity of the starling eye to the range of eggs' maximum UV reflectance. Our study indicates that it is blue-green, not the UV component of the egg's spectral characteristics, which seems to increase the perception of eggs by adults in dark cavities. We suggest that it might have been the most important pressure towards evolution of blue-green colouration of eggs in cavity-nesting birds.

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Section: Light Conditions In Cavities and Nest-boxes With Reference Tmentioning

confidence: 98%

Is UV and blue-green egg colouration a signal in cavity-nesting birds?

Węgrzyn

Leniowski

Rykowska

et al. 2011

Ethology Ecology & Evolution

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show abstract

“…By inserting neutral density (ND) filters (Kodak Wratten gelatin filters) in front of the projector, the luminous intensity from the light source of the projector was reduced, and two additional levels of illuminance conditions were created. Ishida 15 reported that the color identification result at 10 lx was similar to the result at 1000 lx. Hence, the low illuminance condition was assumed as when the surrounding illuminance was less than 10 lx.…”

Section: Illuminance Conditionsmentioning

confidence: 58%

“…Ishida 15 reported that the color identification criterion for a red color chip of 5R4/14 was quite constant through all illuminance levels. Although the criteria for orange and yellow color chips of high saturation are unknown because they were not used in his study, in the case of a red similar to the safety color, the identification of a surface color was relatively easy even at a low illuminance level.…”

Section: Discussionmentioning

confidence: 99%

“…Several studies reported on the change of color appearance under low illuminance. For example, color identification data based on color naming 14,15 and the equivalent lightness of chromatic colors 16 -18 were measured at various levels of illuminance. However, few experiments to detect a target under low illuminance have been conducted.…”

Section: Experiments Ii: Visual Search Under Low Illuminance Conditionsmentioning

confidence: 99%

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Effects of surrounding brightness on visual search for safety colors

Ochiai

Sato

2005

Color Research & Application

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“…The no-contrast results 6,8 for unique hues are similar to those recently reported. 9 As an amateur artist, I had been taught early that colors in shade and sunlight have subtly different hues and should be painted as such. This is common practice with artists and is sometimes exaggerated to add three-dimensionality to a painting.…”

mentioning

confidence: 99%