Development of a Chromatic/Luminance Contrast Scale

Abstract

A model was developed to predict the detectability of small low- contrast targets viewed against a uniform background in daylight conditions. The model quantitatively describes the interrelationships among detectability, target size, target luminance, target chromaticity, background chromaticity, and background luminance. A theoretical approach was used to develop a general form of the predictive model. Two empirical studies were performed to estimate parameters of the model, and a final study was performed to validate the model. The final model is presented in two forms, both easily used in field situations. The first predicts detectability of a specified target (size, luminance and chromaticity) when viewed against a specified background (luminance and chromaticity). The second predicts the distance at which such a target will be detected. A guide to the use of the model is included. Keywords: Aids to navigation, Daymarks, Color vision, Chromatic contrast, Luminance contrast, and Detection model.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1987
Accession Number
ADA198628

Entities

People

  • Harold Stanislaw
  • James P. Thomas
  • Lynn A. Olzak

Organizations

  • University of California, Los Angeles

Tags

Communities of Interest

  • Air Platforms
  • C4I

DTIC Thesaurus Topics

  • Accuracy
  • Analysis Of Variance
  • Artificial Intelligence
  • Coast Guard
  • Color Vision
  • Command And Control
  • Computer Programs
  • Data Analysis
  • Databases
  • Errors
  • Information Science
  • Light Sources
  • New York
  • Plastic Explosives
  • Predictive Modeling
  • Psychology
  • Three Dimensional

Fields of Study

  • Physics

Readers

  • Theoretical Analysis.
  • Vision Science/Vision Psychology/Cognitive Neuroscience.