White's illusion
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White's illusion is an optical illusion illustrating the fact that the same target luminance can elicit different perceptions of brightness in different contexts.
Note, that although the gray rectangles are all of equal luminance, the ones seen in the context with the dark stripes appear brighter than the ones seen in the context with the bright stripes. Note that this effect is opposite to what would be expected from a simple physiological explanation on the basis of simultaneous contrast (in that case the rectangles sharing the long borders with the dark stripes should appear brighter).
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[edit] References
- B. L. Anderson, "Perceptual organization and White's illusion", Perception, Vol. 32, pp. 269-284, 2003
- C. Chubb, G. Sperling & J. A. Solomon, "Texture interactions determine perceived contrast", Proceedings of the National Academy of Sciences, Vol. 86, pp. 9631-9635, 1989
- A. Gilchrist, "Seeing black and white", Oxford University Press: New York, 2006
- S. S. Gindy, "Techniques for subjective colour measurement and their application to colour contrast phenomena", London University, London, UK, 1963
- P. S. H. Henry, "Colour", The Shirley Link (journal of the Cotton, Silk and Man-made Fibres Research Association), pp. 1-4, Summer 1969
- H. Munker, "Farbige Gitter, Abbildung auf der Netzhaut und übertragungstheoretische Beschreibung der Farbwahrnehmung", Ludwig-Maximilians-Universität, München, 1970
- M. White, "A new effect of pattern on perceived lightness", Perception, Vol. 8, pp. 413-416, 1979
- M. White, "The effect of the nature of the surround on the perceived lightness of grey bars within square-wave test gratings", Perception, Vol. 10, pp. 215-230, 1981
- M. White, "The assimilation-enhancing effect of a dotted surround on a dotted test region", Perception, Vol. 11, pp. 103-106, 1982
- M. White & T. White, "Counterphase lightness induction", Vision Research, Vol. 25, pp. 1331-1335, 1985
