THE EFFECTS OF LEVEL OF ILLUMINATION, STROKE-WIDTH, VISUAL ANGLE AND CONTRAST ON THE LEGIBILITY OF NUMERALS OF VARIOUS FONTS

Examination of the effects of level of illumination, stroke-width, visual angle and contrast on legibility of numerals shows that some fonts tested are significantly better than others. There is an optimum luminance level (of about 34.3 cd/sq m) for legibility of white letters on a black background. White letters on black background are significantly more legible than black numerals on a white background. Optimum legibility is obtained when stroke-width/height ratios are less than 1/6 for black numerals and about 1/12 for white numerals. A set of numerals was selected from all those tested which is significantly better than any of the standard sets, particularly for black numerals on a white background. /Author/TRRL/

  • Record URL:
  • Supplemental Notes:
    • Proceedings of 8th Conference, University of Western Australia, Perth.
  • Corporate Authors:

    ARRB Group Ltd.

    Vermont South, Victoria  Australia 

    Australian Road Research Board

    P.O. Box 156
    Nunawading, Victoria 3131,   Australia 
  • Authors:
    • Hind, P R
    • Tritt, B H
    • Hoffmann, E R
  • Conference:
  • Publication Date: 1976

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 46-55
  • Serial:
    • Volume: 8
    • Issue Number: 1

Subject/Index Terms

Filing Info

  • Accession Number: 00164214
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: May 18 1978 12:00AM