STUDIES OF DISPLAY SYMBOL LEGIBILITY. PART XVI: THE LEGIBILITY OF TELETYPEWRITER SYMBOLS ON TELEVISION
MITRE CORP BEDFORD MA
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The legibility of Long Gothic and Murray teletype symbol fonts was studied on television. Subjects identified light symbols on a dark background at four resolutions. The results showed that three special cloud-cover symbols were illegible for all resolutions studied. Under ideal conditions, 10 active lines per symbol height was the minimum recommended resolution for the alphanumeric symbols. The Long Gothic and Murray symbols were equally legible. It is recommended that more legible symbols be used for the three cloud-cover conditions.
- Human Factors Engineering and Man Machine Systems
- Non-Radio Communications