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Proceedings Paper

A limited flight study for investigating hyperstereo vision
Author(s): Melvyn E. Kalich; Clarence E. Rash; William E. McLean; John G. Ramiccio
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Paper Abstract

A number of currently proposed helmet-mounted display (HMD) designs relocate image intensification (I2) tubes to the sides of the helmet. Such a design approach induces a visual condition referred to as hyperstereo vision (or hyperstereopsis). This condition manifests itself to the user as an exaggerated sense of depth perception, causing near- to mid-range objects to appear closer than they actually are. Hyperstereopsis is potentially a major concern for helicopter operations that are conducted at low altitudes. As part of a limited flight study to investigate this phenomenon, five rated U.S. Army aviators, as technical observers, wore a hyperstereo HMD during the conduct of a series if 13 standard maneuvers. Two subject aviators acquired a total of eight hours and three aviators a single hour of flight. Using a post-flight questionnaire, these aviators were asked to compare their visual experiences to that of normal I2-aided flight. Depth perception at distances below 300 feet was identified as the greatest challenge. The two 8-hour aviators reported a 5-8 hour "adaptation" period for most maneuvers.

Paper Details

Date Published: 1 May 2007
PDF: 14 pages
Proc. SPIE 6557, Head- and Helmet-Mounted Displays XII: Design and Applications, 65570I (1 May 2007); doi: 10.1117/12.717219
Show Author Affiliations
Melvyn E. Kalich, U.S. Army Aeromedical Research Lab. (United States)
Clarence E. Rash, U.S. Army Aeromedical Research Lab. (United States)
William E. McLean, U.S. Army Aeromedical Research Lab. (United States)
John G. Ramiccio, U.S. Army Aeromedical Research Lab. (United States)

Published in SPIE Proceedings Vol. 6557:
Head- and Helmet-Mounted Displays XII: Design and Applications
Randall W. Brown; Colin E. Reese; Peter L. Marasco; Thomas H. Harding, Editor(s)

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