Additivity of spatially induced blackness
نویسندگان
چکیده
منابع مشابه
Additivity of spatially induced blackness.
Tests of additivity of the postreceptoral pathways that mediate the perception of blackness were conducted under conditions of spatial contrast. Observers increased the radiance of a surrounding annulus until a broadband (white) test center appeared completely black. Additivity tests with heterochromatic flicker photometry (HFP) and direct brightness matching were also conducted for each observ...
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The surface-mode property of "blackness" is induced by simultaneous contrast with an adjacent, more luminant surround. As numerous studies have shown, the degree of blackness induced within an achromatic test field is a function of the relative luminance of the adjacent chromatic inducing field, but not of its hue. But in the converse case of chromatic test fields, susceptibility to blackening ...
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A small patch of achromatic light viewed within a large achromatic surround appears gray or black when the radiance of the surround is well above that of the patch. No single light can match the appearance of the patch because no light in isolation appears blackish; blackness is induced by a second stimulus. The present experiments examine the locus of the mechanisms mediating induction of blac...
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In what remains one of the central accomplishments of cognitive anthropology, Berlin and Kay (1969) demonstrated that the diversity of human color systems was built on a universal infrastructure, with black and white being the most basic colors in all systems. The analytical focus of their work is a structural system divorced from the messy tasks of actually using color terms to make relevant d...
متن کاملSpectral efficiency of blackness induction.
The spectral efficiency of blackness induction was measured in three normal trichromatic observers and in one deuteranomalous observer. The psychophysical task was to adjust the radiance of a monochromatic 60-120' annulus until a 45' central broadband field just turned black and its contour became indiscriminable from a dark surrounding gap that separated it from the annulus. The reciprocal of ...
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ژورنال
عنوان ژورنال: Journal of the Optical Society of America A
سال: 1990
ISSN: 1084-7529,1520-8532
DOI: 10.1364/josaa.7.000106