The lowest spatial frequency channel determines brightness perception

A. Perna, M. C. Morrone

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

This study investigates the role played by individual spatial scales in determining the apparent brightness of greyscale patterns. We measured the perceived difference in brightness across an edge in the presence of notch filtering and high-pass filtering for two stimulus configurations, one that elicits the perception of transparency and one that appears opaque. For both stimulus configurations, the apparent brightness of the surfaces delimited by the border decreased monotonically with progressive (ideal) high-pass filtering, with a critical cut-off at 1 c/deg. Using two octave ideal notch filtering, the maximum detrimental effect on apparent brightness was observed at about 1 c/deg. Critical frequencies for apparent brightness did not vary with contrast, viewing distance, or surface size, suggesting that apparent brightness is determined by the channel tuned at 1 c/deg. Modelling the data with the local energy model [Morrone, M. C., & Burr, D. C. (1988). Feature detection in human vision: a phase dependent energy model. Proceedings of the Royal Society (London), B235, 221-245] at 1 c/deg confirmed the suggestion that this channel mediates apparent brightness for both opaque and transparent borders, with no need for pooling or integration across spatial channels.

Original languageEnglish
Pages (from-to)1282-1291
Number of pages10
JournalVision Research
Volume47
Issue number10
DOIs
Publication statusPublished - May 2007

Keywords

  • Brightness
  • Edges and lines detection
  • Feature detection
  • Filling-in
  • Spatial frequency channels

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems

Cite this

The lowest spatial frequency channel determines brightness perception. / Perna, A.; Morrone, M. C.

In: Vision Research, Vol. 47, No. 10, 05.2007, p. 1282-1291.

Research output: Contribution to journalArticle

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