Detection and Identification Contrast Sensitivity in Response to Complex Stationary and Moving Targets.

Abstract

Five well-practiced observers set detection and identification contrast thresholds for Snellen-letter stimuli of different sizes (i.e., fundamental spatial frequencies) under the following conditions: moving (three velocities) vs. stationary, six rotations in the picture plane, and flickering (five temporal frequencies). The subjects contrast sensitivities for Snellen-letter stimuli were also compared to their contrast sensitivity functions (CSFs) for both static and moving sinusoidal gratings. In a final experiment, subjects adapted to stationary spatial-frequency gratings and set contrast thresholds for letter stimuli.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1981
Accession Number
ADA113882

Entities

People

  • J. Timothy Petersik

Organizations

  • Southeast Missouri State University

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Contrast
  • Detection
  • Detectors
  • Frequency
  • Identification
  • Information Processing
  • Observers
  • Pattern Recognition
  • Perception
  • Physical Properties
  • Psychology
  • Recognition
  • Sine Waves
  • Three Dimensional
  • Waveform Generators

Readers

  • Vision Science/Vision Psychology/Cognitive Neuroscience.