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Beginning of the Quest Beginning of the Quest
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Bottom-Up: Visual Object to “Early” Visual Processing Bottom-Up: Visual Object to “Early” Visual Processing
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Top-Down: Perceptual Imperatives Top-Down: Perceptual Imperatives
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Conclusions Conclusions
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References References
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36 The Shifted-Chessboard Pattern as Paradigm of the Exegesis of Geometrical-Optical Illusions
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Published:June 2017
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Abstract
The shifted chessboard or café wall illusion yields to analysis at the two poles of the practice of vision science: bottom-up, pursuing its course from the visual stimulus into the front end of the visual apparatus, and top-down, figuring how the rules governing perception might lead to it. Following the first approach, examination of the effects of light spread in the eye and of nonlinearity and center-surround antagonism in the retina has made some inroads and provided partial explanations; with respect to the second, principles of perspective and of continuity and smoothness of contours can be evoked, and arguments about perception as Bayesian inference can be joined. Insights from these two directions are helping neurophysiologists in their struggle to identify a neural substrate of the phenomenon Münsterberg described in 1897.
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