EFFECT OF SURROUND AND STIMULUS LUMINANCE ON THE DISCRIMINATION OF HUE

Abstract

The effects of changes in the luminance of the stimulus and the surround on hue discrimination were experimentally investigated, using the method of constant stimuli. All observations were made at 550 millimicrons; the standard deviation was used as the measure of sensitivity. Surround luminance was found to have no effect on hue discrimination until the surround had three or more times the luminance of the stimulus. As the surround to stimulus ratios increased, the threshold rose sharply. Increase of the stimulus intensity over a range of 1.5 log units from the photopic threshold increased the discrimination threshold by an average of only about 2 millimicrons.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1964
Accession Number
AD0611902

Entities

People

  • Mary M. Connors

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Biomedical Research
  • Color Coding
  • Discrimination
  • Hard Copy
  • Illumination
  • Intensity
  • Judgment
  • Light Sources
  • Luminance
  • Naval Vessels
  • Navy
  • Observation
  • Observers
  • Standards

Fields of Study

  • Biology
  • Psychology

Readers

  • Vision Science/Vision Psychology/Cognitive Neuroscience.