منابع مشابه
Spatial organization affects lightness perception on articulated surrounds.
The articulation effect refers to a change in lightness contrast induced by adding small patches of different luminances to a uniform background surrounding a target in a lightness contrast display. This study investigated how local luminance signals are integrated to generate the articulation effect. We asked whether spatial organization due to perceptual grouping can influence the articulatio...
متن کاملColor constancy, lightness constancy, and the articulation hypothesis.
The light that reaches the eye has a history. Its spectral distribution at each point of the retina depends on the illumination present in the scene, the spectral properties of surfaces it encounters on its path to the eye, and other factors (Nassau 1983). The human visual system assigns colors to surfaces. If the assigned color of a surface patch is (approximately) determined by the spectral p...
متن کاملArticulation effects in lightness: historical background and theoretical implications.
The concept of articulation was first introduced by Katz [1935 The World of Colour (London: Kegan Paul, Trench, Trubner & Co)] to refer to the degree of complexity within a field. Katz, who created the basic research methods for studying lightness constancy, found that the greater the degree of articulation within a field of illumination, the greater the degree of constancy. Even though this co...
متن کاملContext-dependent lightness affects perceived contrast
Perceived contrast of a grating varies with its background (or mean) luminance: of the two gratings with the same photometric contrast the one on higher luminance background appears to have higher contrast. Does perceived contrast also vary with context-dependent background lightness even when the luminance remains constant? We investigated this question using a stimulus in which two equilumina...
متن کاملVoicing affects perceived manner of articulation
The perception of voiced fricatives by native speakers of a language which lacks those phonemes is studied in this paper. Brasilian portuguese and Galician languages were chosen because they are historically related. A forced choice test reveals that listeners correctly perceive the place of articulation of the voiced fricatives. In order to examine whether the perception of fricative manner ca...
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ژورنال
عنوان ژورنال: Perception & Psychophysics
سال: 1999
ISSN: 0031-5117,1532-5962
DOI: 10.3758/bf03206185