VISUAL DETECTION CAPACITY OF NORMAL OBSERVERS: A COMPARISON OF THE RESULTS OF VARIOUS INVESTIGATIONS

This comparative study extends the range of data to encompass more visibility situations in experimental roadway detection experiments, and presents an analytic formulation which represents an extended data set. The studies show that many factors interplay to generate different results. The luminance of the unform surround and adaptation level must not be used interchangeably. Consideration of the area of background that is imaged outside the fovea as a glare source will result in a value for the adaptation that is higher than the luminance of the surround. Studies show that the most important factor governing detection is the luminance contrast existing between the target edge and the immediate surround. Comments are also made regarding visual detection studies performed in the laboratory.

• Corporate Authors:

  National Research Council of Canada

  Division of Applied Physics
  Ottawa, ONo K1A OR6,   Canada 
• Authors:
  • HUCULAK, P
• Publication Date: 1976-3-18

Media Info

• Features: Figures; References; Tables;
• Pagination: 10 p.

Subject/Index Terms

• TRT Terms: Brightness; Detection and identification; Detectors; Glare; Visual perception
• Old TRIS Terms: Backgrounds
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00149783
• Record Type: Publication
• Report/Paper Numbers: Report No. ST-834
• Files: TRIS
• Created Date: Apr 13 1977 12:00AM