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The Hunt effect or Luminance-on-colorfulness effect comprises an increase in
The Hunt effect or Luminance-on-colorfulness effect comprises an increase in colorfulness
Colorfulness, chroma and saturation are attributes of perceived color relating to chromatic intensity. As defined formally by the International Commission on Illumination (CIE) they respectively describe three different aspects of chromatic ...
of a color with increasing luminance
Luminance is a photometric measure of the luminous intensity per unit area of light travelling in a given direction. It describes the amount of light that passes through, is emitted from, or is reflected from a particular area, and falls wit ...
. The effect was first described by RWG Hunt in 1952.
Hunt noted that this effect occurs at low luminance levels. At higher luminance, he noted a hue shift of colors to be more blue with higher luminance, which is now known as the Bezold–Brücke effect. The Hunt effect is related to the Helmholtz–Kohlrausch effect
The Helmholtz–Kohlrausch effect (named after Hermann von Helmholtz and V. A. Kohlrausch) is a perceptual phenomenon wherein the intense saturation of spectral hue is perceived as part of the color's luminance. This brightness increase by sat ...
, where a saturated stimulus is seen to be brighter than less saturated or achromatic stimuli.
See also
*Opponent process
The opponent process is a color theory that states that the human visual system interprets information about color by processing signals from photoreceptor cells in an antagonistic manner. The opponent-process theory suggests that there are thre ...
* Purkinje shift
* Abney effect
References
Color appearance phenomena {{color-stub