Accession Number : AD0619959

Title :   SPEED OF IDENTIFICATION OF TELEVISED SYMBOLS AS A FUNCTION OF VERTICAL RESOLUTION.

Descriptive Note : Final rept.,

Corporate Author : ROME AIR DEVELOPMENT CENTER GRIFFISS AFB N Y

Personal Author(s) : Elias,Merrill F.

Report Date : JUL 1965

Pagination or Media Count : 31

Abstract : An experiment was performed to determine the effect of vertical symbol resolution on speed of identification of televised letters and numbers. Subjects viewed 36 alphanumeric symbols, 10 times under 7 conditions of symbol resolution (5 to 11 scan lines), and under a solid-symbol (nontelevised) control condition. Performance showed a progressive improvement from 5 to 11 lines, but did not reach a level obtained with solid symbols. It was concluded that 11 lines approaches an optimal level of resolution, and that reduction in symbol resolution much below 11 lines should be approached with caution. (Author)

Descriptors :   (*TELEVISION DISPLAY SYSTEMS, VISUAL PERCEPTION), (*RESOLUTION, TELEVISION DISPLAY SYSTEMS), (*VISUAL PERCEPTION, TELEVISION DISPLAY SYSTEMS), COMMAND AND CONTROL SYSTEMS, ELECTRON OPTICS, VIDEO SIGNALS, INTELLIGIBILITY, PERFORMANCE(HUMAN)

Distribution Statement : APPROVED FOR PUBLIC RELEASE