منابع مشابه
Lightness constancy in primary visual cortex.
When the illumination of a visual scene changes, the quantity of light reflected from objects is altered. Despite this, the perceived lightness of the objects generally remains constant. This perceptual lightness constancy is thought to be important behaviorally for object recognition. Here we show that interactions from outside the classical receptive fields of neurons in primary visual cortex...
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 کاملPoster: Lightness Constancy in Surface Visualization
Color is an effective and commonly used channel for displaying data in surface visualization. However, color is affected by shadows and shading, which convey depth and shape on surfaces. The human visual system has evolved constancy mechanisms for identifying color under varying illumination conditions. Lightness constancy allows people to accurately perceive colors in real shadows; however, it...
متن کاملLightness constancy in 4-month-old infants
In the present study, discrete trial familiarization/novelty techniques were used to study lightness constancy in 4-month-old infants. The test stimuli were real objects (paper smiley faces) of two different reflectances, dark gray (17% reflectance) and light gray (54% reflectance). In Experiment 1, the test stimuli were viewed against a white (90% reflectance) surround, and in Experiment 2, ag...
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...
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ژورنال
عنوان ژورنال: Journal of Vision
سال: 2011
ISSN: 1534-7362
DOI: 10.1167/11.11.371