May 2008
Volume 8, Issue 6
Free
Vision Sciences Society Annual Meeting Abstract  |   May 2008
The development of natural image contrast sensitivity
Author Affiliations
  • Dave Ellemberg
    Department of Kinesiology, Université de Montréal, Montréal, Canada, and Centre de Recherche en Neuropsychologie et Cognition (CERNEC)
  • Aaron Johnson
    Department of Psychology, Concordia University, Montreal, Canada
  • Bruce Hansen
    Department of Psychology, Colgate University, New York, USA
Journal of Vision May 2008, Vol.8, 346. doi:10.1167/8.6.346
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to Subscribers Only
      Sign In or Create an Account ×
    • Get Citation

      Dave Ellemberg, Aaron Johnson, Bruce Hansen; The development of natural image contrast sensitivity. Journal of Vision 2008;8(6):346. doi: 10.1167/8.6.346.

      Download citation file:


      © ARVO (1962-2015); The Authors (2016-present)

      ×
  • Supplements
Abstract

The present study verified the hypothesis that the development of contrast sensitivity to the spatial frequency content of natural images extends beyond the development of contrast sensitivity when tested with luminance modulated sine-wave gratings. In the same group of children and adults, we compared contrast sensitivity with a series of natural images for which a specific slice of spatial content was removed (a narrow range of à values) and we also tested contrast sensitivity with a series of sine-wave gratings varying in spatial frequency. Thresholds were measured with a temporal forced-choice task combined with a QUEST staircase procedure. Our data show that for children and adults, detection thresholds for natural images were increased by the removal of spatial content and the shift in threshold was dependent on the spatial frequencies removed. Indeed, thresholds were most elevated when the frequencies removed were those that the visual system is most sensitive to. This suggests a close relationship between spatial frequency processing and natural image perception. However, unlike grating contrast sensitivity, which becomes adult-like at each frequency tested by about 7 years of age, contrast sensitivity for natural images only becomes adult-like by about 10 years of age. Further, sensitivity matures less rapidly for lower frequency filtered natural images than for the higher frequency filtered natural images. Together, these results indicate that the mechanisms involved in the processing of the spatial frequency content of natural images mature less rapidly than specific mechanisms tuned to a single spatial frequency and orientation. Finally, because of the important developmental differences between traditional contrast sensitivity compared to natural image contrast sensitivity, the latter might be a more ecologically relevant way assess the limits of visual perception in children and in individuals with a visual pathology.

Ellemberg, D. Johnson, A. Hansen, B. (2008). The development of natural image contrast sensitivity [Abstract]. Journal of Vision, 8(6):346, 346a, http://journalofvision.org/8/6/346/, doi:10.1167/8.6.346. [CrossRef]
Footnotes
 Supported by an NSERC grant to D.E.
×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×