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Review of colour constancy in human visual system
Member rating: No Rating | Words: 3850 | Submitted: Tue May 06 2008
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Introduction Object surfaces differ in how they can absorb and reflect light [Brainard, 2003]. The spectral distribution of the light that reaches the eye under specific lighting conditions is known as luminance. In the simplest model, luminance is determined by the spectral power distribution (colour) and angle of the light reaching the object, and the reflectance properties of the object in the scene. More complex models also account for the atmosphere the light travels through.[Adelson, 1999] Human beings are able to see the same scene under different illumination conditions, and are still able to maintain a perceptual representation of scenes that remains stable against these changes in illumination [Kraft and Brainard, 1999]. This phenomenon is known as colour constancy. Colour constancy is essential if colour information is to be used as a useful variable in the identification of an object, as if something appears to be a different colour under differential...
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