An empirical explanation of brightness.

Published

Journal Article

In this second part of our study on the mechanism of perceived brightness, we explore the effects of manipulating three-dimensional geometry. The additional scenes portrayed here demonstrate that the same luminance profile can elicit different sensations of brightness as a function of how the objects in the scene are arranged in space. This further evidence confirms the implication of the scenes presented in the accompanying paper, namely that sensations of relative brightness-including standard demonstrations of simultaneous brightness contrast-cannot arise by computations of local contrast. The most plausible explanation of the full range of perceptual phenomena we have described is an empirical strategy that links the luminance profile in a visual stimulus with an association (the percept) that represents the profile's most probable real-world source.

Full Text

Duke Authors

Cited Authors

  • Williams, SM; McCoy, AN; Purves, D

Published Date

  • October 1998

Published In

Volume / Issue

  • 95 / 22

Start / End Page

  • 13301 - 13306

PubMed ID

  • 9789083

Pubmed Central ID

  • 9789083

Electronic International Standard Serial Number (EISSN)

  • 1091-6490

International Standard Serial Number (ISSN)

  • 0027-8424

Digital Object Identifier (DOI)

  • 10.1073/pnas.95.22.13301

Language

  • eng