Chapter

Surface Completion: Psychophysical and Neurophysiological Studies of Brightness

Andrew F. Rossi and Michael A. Paradiso

in Filling-In

Published in print April 2003 | ISBN: 9780195140132
Published online May 2009 | e-ISBN: 9780199865307 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780195140132.003.0004
 Surface Completion: Psychophysical and Neurophysiological Studies of Brightness

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This chapter presents data from psychophysical and physiological experiments that explored brightness perception and the possible involvement of filling-in. It begins with a discussion of psychophysical experiments that imply that there is a scale-dependent filling-in process always at work in the perception of lightness. This process is remarkably slow compared to feature detection, and it appears to be initiated near luminance-contrast boundaries. It then discusses physiological data that suggest that there is an explicit representation of lightness, not in the retina, but in visual cortex. Lightness-correlated activity in striate cortex appears to result from extensive inhibitory and facilitatory interactions from outside the small classical receptive fields.

Keywords: filling-in; visual perception; visual percepts; brightness perception; visual cortex

Chapter.  8596 words.  Illustrated.

Subjects: Neuroscience

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