STUDIES OF DISPLAY SYMBOL LEGIBILITY. PART 7: COMPARISON OF DISPLAYS AT 945- AND 525-LINE RESOLUTIONS
MITRE CORP BEDFORD MA
Pagination or Media Count:
The legibility of Leroy alphanumerics was determined for 6, 8, 10, and 12 active scan lines per symbol height on a good quality 945-line television system. These results were compared with those of a similar study in which an inexpensive commercial 525-line television system was used. One group of subjects identified symbols displayed by the 945-line system while a second group identified symbols displayed by the 525-line system. The symbols were presented singly, and the speed and accuracy with which the subjects were able to identify them were recorded. The results showed that, even with good quality television, identification performance deteriorated for resolutions lower than 10 lines per symbol height. Performance for the two television systems was similar for 8, 10, and 12 lines per symbol height but at 6 lines per symbol height, performance was better for the 945-line television than it was for the 525-line television system. As with previous experiments in this series, 10 lines per symbol height was the lowest resolution recommended for television displays.
- Human Factors Engineering and Man Machine Systems
- Non-Radio Communications