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1 May 2007 A limited flight study for investigating hyperstereo vision
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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.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Melvyn E. Kalich, Clarence E. Rash, William E. McLean, and John G. Ramiccio "A limited flight study for investigating hyperstereo vision", Proc. SPIE 6557, Head- and Helmet-Mounted Displays XII: Design and Applications, 65570I (1 May 2007);


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