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Vehicle Detection on Television: A Laboratory Experiment.
NAVAL WEAPONS CENTER CHINA LAKE CA
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An experiment was conducted to measure the ability of observers to search for and detect vehicular targets in a real-world scene displayed on a TV monitor. Search time was limited to 3 seconds the variables investigated were 1 angular subtense of the display and target, 2 the number of TV scan lines making up the target, and 3 the target-background contrast. The angular subtense of the display and target significantly affected performance it was found that the display should subtend at least 8 and preferably 10 degrees to the obsever. Larger displays yielded little improvement in performance. The number of TV scan lines making up the target did not significantly affect performance the lowest number used in the testsseven was sufficient, and increasing the number did not improve performance. Target location in the scene significantly affected performance targets located in the bottom of the scene were easier to detect. Because of the oblique view, the targets in the bottom were larger and there was less terrainfoliage clutter. Author
APPROVED FOR PUBLIC RELEASE