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constancy  

Definición

  • An important function of perceptual systems is to accurately determine object properties—physical properties of objects that remain constant. For example, an object's shape, size, and reflectance (fraction of light and spectral distribution of light reflected from the object) typically remain constant and so are considered properties of the object. [Source: Encyclopedia of Perception; Constancy]

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http://data.loterre.fr/ark:/67375/N9J-DHSL1LJ5-1

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