Accession Number : AD0728646

Title :   Comparison of Zoom Magnification vs Discrete Magnification for Target Scanning Tasks.

Descriptive Note : Technical rept. Oct 70-Jul 71,

Corporate Author : ROME AIR DEVELOPMENT CENTER GRIFFISS AFB N Y

Personal Author(s) : Ventimiglia,Daniel A.

Report Date : JUL 1971

Pagination or Media Count : 46

Abstract : The report describes the test and evaluation of zoom magnification versus discrete magnification for target scanning tasks on a rear projection viewer surface. The magnification range tested was 3X to 75X. The discrete selections were 3X, 6X, 12X, 18X, 30X, 50X, and 75X. The results are discussed for significant differences between magnification modes for plotted and unplotted targets in terms of time, accuracy, and completeness measures. Frequency of magnification change is significant for plotted targets. Also, some significant differences have been noted between scales for plotted and unplotted targets. (Author)

Descriptors :   (*PHOTOINTERPRETATION, OPTICAL EQUIPMENT), (*TARGET DISCRIMINATION, PERFORMANCE TESTS), SCANNING, DISPLAY SYSTEMS, LENSES, PHOTOGRAPHIC PROJECTORS, SCALE, PHOTOINTERPRETERS, ACCURACY, ANALYSIS OF VARIANCE, MILITARY INTELLIGENCE

Subject Categories : Photography
      Human Factors Engineering & Man Machine System

Distribution Statement : APPROVED FOR PUBLIC RELEASE