The Effect of a Peripheral Glare Source upon the Apparent Brightness of an Object

Amount of surround and test-inducing separation in simultaneous brightness contrast

“…Brightness of the test field was found to be enhanced when the inducing luminance was less than the test luminance (Heinemann, 1955;Kleman et ai, 19(1) and depressed when the inducing luminance was greater than the test luminance (Diamond, 1953). In addition, depression of the test field was found to decrease with an increase in spatial separation (Beitel, 1936;Fry & Alpern, 1953;Leibowitz, Mote, & Thurlow, 1953) and increase with an increase in the inducing-field area (Diamond, 1955).…”

Perceived area and the luminosity threshold

“…We call these grayness induction (or downward induction) and luminosity induction (or upward induction), respectively, and both have been obtained in empirical work. Grayness induction is obtained in standard "brightness induction" experiments (Diamond, 1953;Fry & Alpern, 1953;Heinemann, 1955;Horeman, 1965;Leibowitz, Mote, & Thurlow, 1953;Torii & Uemura, 1965). Increasing the luminance difference between a target (usually called the testfield) and a neighboring region (called the inducingfield) produces a perceived darkening of the darker region, but not a brightening of the brighter region.…”

A neuromorphic model for achromatic and chromatic surface representation of natural images

“…Also, the radially compact arrangement decreases the distance between different levels of gray patches, thereby inducing stronger lateral inhibition. The dependence of the distance between an inducer and test surfaces has been observed in lightness (Newson, 1958) and brightness experiments (Cole & Diamond, 1971;Fry & Alpern, 1953;Leibowitz et al, 1953), where the darker test surface became lighter with increasing distance from the inducer, an effect interpreted to be due to surround inhibition. Again the BHLA W process anchors the perception of white.…”