Lightness contrast and failures of constancy: A common explanation
نویسندگان
چکیده
منابع مشابه
Lightness contrast and failures of constancy: a common explanation.
Observers were asked to select, from a grid of 16 achromatic Munsell chips presented on a white background in bright illumination, a sample to match a light gray chip simultaneously presented on the same white background but in a shadowed region adjacent to the brightly illuminated region. The border dividing the two fields of illumination was made to appear as either a reflec-tance edge or an ...
متن کاملGilchrist (1988) Lightness contrast and failures of constancy. A common explanation
Observers were asked to select, from a grid of 16 achromatic Munsell chips presented on a white background in bright illumination, a sample to match a light gray chip simultaneously presented on the same white background but in a shadowed region adjacent to the brightly illuminated region. The border dividing the two fields of illumination was made to appear as either a reflec-tance edge or an ...
متن کاملImpossible shadows and lightness constancy.
The intersection between an illumination and a reflectance edge is characterised by the 'ratio-invariant' property, that is the luminance ratio of the regions under different illumination remains the same. In a CRT experiment, we shaped two areas, one surrounding the other, and simulated an illumination edge dividing them in two frames of illumination. The portion of the illumination edge stand...
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 کاملLightness constancy: ratio invariance and luminance profile.
The term simultaneous lightness constancy describes the capacity of the visual system to perceive equal reflecting surfaces as having the same lightness despite lying in different illumination fields. In some cases, however, a lightness constancy failure occurs; that is, equal reflecting surfaces appear different in lightness when differently illuminated. An open question is whether the luminan...
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ژورنال
عنوان ژورنال: Perception & Psychophysics
سال: 1988
ISSN: 0031-5117,1532-5962
DOI: 10.3758/bf03207877