LOSS OF COLOR DISCRIMINATION UNDER REDUCED VISUAL CONDITIONS

UNDER REDUCED VISUAL CONDITIONS, SMALL AREA AND LOW LUMINANCE, COLOR DISCRIMINATION FOR NORMAL EYES DETERIORATES IN A MANNER SIMILAR TO THAT OBSERVED FOR TRITANOPIC VISION. TRITANOPIC VISION IS CHARACTERIZED BY AN INABILITY TO DISCRIMINATE BETWEEN GREENISH-YELLOW AND PURPLISH-BLUE; THE SPECTRUM IS SEEN ONLY AS REDS AND GREENS. IN A STUDY OF THIS DETERIORATION OF COLOR DISCRIMINATION, THE RELATIONSHIP BETWEEN AREA AND LUMINANCE FOR LOSS OF COLOR DISCRIMINATION WAS QUANTIFIED USING COLOR-MATCHING TECHNIQUES. AN EMPIRICAL EQUATION WAS OBTAINED THAT DESCRIBES THE THRESHOLD OF CHROMATICITY DISCRIMINABILITY UNDER REDUCED VISUAL CONDITIONS. A RECIPROCAL RELATION WAS FOUND BETWEEN SMALL TARGET AREA AND LOW LUMINANCE. OBSERVERS TESTED SHOW THAT THE ABILITY TO MATCH COLORS THAT LIE ON LINES THAT POINT TOWARD THE REDDISH-BLUE CORNER OF THE CHROMATICITY DIAGRAM SUFFERS GREATER LOSSES THAN FOR LINES THAT POINT TOWARD THE RED PART OF THE CHROMATICITY DIAGRAM, WHICH IS A CONSISTENT RESULT WITH THE BASIC CHARACTERISTICS OF TRITANOPIC VISION.

• Supplemental Notes:
  • Vol 5o, No 7, P 165
• Corporate Authors:

  National Bureau of Standards

  Department of Commerce, Office of Technical Publications
  Washington, DC  United States  20234
• Publication Date: 1969-7

Media Info

• Serial:
  • Dimensions NBS

Subject/Index Terms

• TRT Terms: Brightness; Chromates; Color; Color vision; Vision
• Uncontrolled Terms: Matching
• Old TRIS Terms: Vision characteristics
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00220633
• Record Type: Publication
• Source Agency: Optical Society America Journal
• Files: TRIS
• Created Date: Mar 15 1971 12:00AM