منابع مشابه
Perceptual grouping-dependent lightness processing in human early visual cortex.
Lightness, the perceived relative achromatic reflectance of a surface, depends strongly on the context within which the surface is viewed. Modest changes in the two-dimensional configuration or three-dimensional scene geometry may lead to profound variations in lightness even though the surface luminance remains constant. Despite recent progress, we are far from a complete understanding of how ...
متن کاملPerceptual Grouping and Change Detection Perceptual Grouping in Change Detection Perceptual Grouping and Change Detection
Detection of an item changing its location from one instance to another is typically unaffected by changes in the shape or color of contextual items. However, we demonstrate here that such location change detection is severely impaired if the elongated axes of contextual items change orientation, even though individual locations remain constant and even though the orientation was irrelevant to ...
متن کاملPerceptual organization in lightness
The earliest thinking about lightness assumed that perceptual experience correlates with local stimulation. Wallach’s (1948) celebrated disk/annulus experiments showed that lightness depends on relative luminance, not absolute luminance, but his ratio theory recognized perceptual structure in only a minimal way. Work following the cognitive revolution showed that lightness depends on (1) depth ...
متن کاملPerceptual belongingness determines the direction of lightness induction depending on grouping stability and intentionality
Contrast and assimilation are two opposite perceptual phenomena deriving from the relationships among perceptual elements in a visual field. In contrast, perceptual differences are enhanced; while, in assimilation, they are decreased. Indeed, if contrast or assimilation occurs depends on various factors. Interestingly, Gestalt scientists explained both phenomena as the result of perceptual belo...
متن کاملPart-Whole Perception in Early Infancy: Evidence for Perceptual Grouping Produced by Lightness Similarity
Four experiments using the fomiliarizotion-novelty preference procedure were conducted to determine whether 3-month-old infonts con organize visual pattern information in a monner predicted by the Gestalt principle of lightness similarity. The combined results of Experiments 1 through 3 suggest that infants were able to group individual elements into larger perceptual units on the basis of ligh...
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ژورنال
عنوان ژورنال: Journal of Vision
سال: 2009
ISSN: 1534-7362
DOI: 10.1167/9.14.54