Discriminability of suprathreshold compound spatial frequency gratings

Dov Sagi*, Shaul Hochstein

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

We have investigated the detectability of small contrast changes in compound suprathreshold gratings, containing two sinusoidal components. We examined the relationship between the detectability of changes in each of the components alone and the detectability of changes in the two components together. It was found that for the pairs of spatial frequencies 1 and 9 c deg there is a square law summation, but for spatial frequency pairs ω and 3ω there is a greater summation which depends on the relative phases of the gratings components. The results indicate the existence of broadband phase selective spatial frequency channels, of 2 octaves bandwidth.

Original languageEnglish
Pages (from-to)1595-1606
Number of pages12
JournalVision Research
Volume23
Issue number12
DOIs
StatePublished - 1983

Keywords

  • Bandwidth
  • Channels
  • Compound stimulus
  • Psychophysics
  • Sinusoidal grating
  • Spatial frequency

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