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

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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

Author(s):
Ventimiglia, Daniel A.
Author Organization(s):
ROME AIR DEVELOPMENT CENTER GRIFFISS AFB N Y
Descriptive Note:
Technical rept. Oct 70-Jul 71,
Pagination:
0046

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
RADC-TR-71-161
Project Number(s):
AF-69DB0000
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*PHOTOINTERPRETATION, OPTICAL EQUIPMENT), (*TARGET DISCRIMINATION, PERFORMANCE TESTS), SCANNING, DISPLAY SYSTEMS, LENSES, PHOTOGRAPHIC PROJECTORS, SCALE, PHOTOINTERPRETERS, ACCURACY, ANALYSIS OF VARIANCE, MILITARY INTELLIGENCE
Field(s)/Group(s):
Photography, Human Factors Engineering and Man Machine Systems
Keyword(s):
*ZOOM MAGNIFICATION, EVALUATION
Report Date:
1971 Jul 01