An empirical basis for Mach bands.

Journal Article (Journal Article)

Mach bands, the illusory brightness maxima and minima perceived at the initiation and termination of luminance gradients, respectively, are generally considered a direct perceptual manifestation of lateral inhibitory interactions among retinal or other lower order visual neurons. Here we examine an alternative explanation, namely that Mach bands arise as a consequence of real-world luminance gradients. In this first of two companion papers, we analyze the natural sources of luminance gradients, demonstrating that real-world gradients arising from curved surfaces are ordinarily adorned by photometric highlights and lowlights in the position of the illusory bands. The prevalence of such gradients provides an empirical basis for the generation of this perceptual phenomenon.

Full Text

Duke Authors

Cited Authors

  • Lotto, RB; Williams, SM; Purves, D

Published Date

  • April 1999

Published In

Volume / Issue

  • 96 / 9

Start / End Page

  • 5239 - 5244

PubMed ID

  • 10220450

Pubmed Central ID

  • PMC21848

Electronic International Standard Serial Number (EISSN)

  • 1091-6490

International Standard Serial Number (ISSN)

  • 0027-8424

Digital Object Identifier (DOI)

  • 10.1073/pnas.96.9.5239


  • eng