Accession Number : AD0649908

Title :   INFLUENCE OF OVERLAP ON SPEED AND ACCURACY IN SCREENING IMAGERY,

Corporate Author : SYSTEM DEVELOPMENT CORP FALLS CHURCH VA

Personal Author(s) : Willmorth,N. E.

Report Date : FEB 1967

Pagination or Media Count : 30

Abstract : Student interpreters each screened four rolls of imagery--two of positive transparencies, and two of negative transparencies; one roll with overlap and one without, one of high quality, the other of low quality. Analysis of screening performance yielded seven scores: total time, frame time (average per frame), accuracy, completeness, efficiency, screening errors, and detection errors. The following findings were obtained from the study: (1) With overlap, detection of potentially useful frames required considerably more time, with negligible increase in completeness and no increase in accuracy; (2) Negative transparencies, both with or without overlap, were screened as rapidly as positive transparencies, but with some degradation of accuracy and completeness and an increase in errors: (3) Low quality imagery, both with and without overlap, reduced accuracy and completeness but not screening time: (4) Performance improved significantly from trial to trial. Although the routine use of overlapping imagery does not appear justified in view of the additional screening time required, improved performance from trial to trial suggests that further additional experience with screening may yield improvement in interpreter performance. (Author)

Descriptors :   (*PHOTOINTERPRETATION, EFFICIENCY), (*PHOTOGRAPHIC INTELLIGENCE, PHOTOINTERPRETATION), PERFORMANCE(HUMAN), ACCURACY, PHOTOGRAPHIC IMAGES, SELECTION, AERIAL PHOTOGRAPHS

Subject Categories : Psychology
      Cartography and Aerial Photography
      Military Intelligence

Distribution Statement : APPROVED FOR PUBLIC RELEASE