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Proceedings Paper

Hyperstereopsis in helmet-mounted NVDs: time to contact estimation
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Paper Abstract

The side mounting of the night-vision sensors on some helmet-mounted systems creates a situation of hyperstereopsis in which the binocular cues available to the operator are exaggerated such that distances around the point of fixation are increased. For a moving surface approaching the observer, the increased apparent distance created by hyperstereopsis should result in greater apparent speed of approach towards the surface and so an operator will have the impression they have reached the surface before contact actually occurs. We simulated motion towards a surface with hyperstereopsis and compared judgements of time to contact with that under normal stereopsis as well as under binocular viewing without stereopsis. We simulated approach of a large, random-field textured and found that time to contact estimates were shorter under the hyperstereoscopic condition than those under normal stereo and no stereo, indicating that hyperstereopsis may cause observers to underestimate time to contact leading operators to undershoot the ground plane when landing.

Paper Details

Date Published: 1 May 2007
PDF: 7 pages
Proc. SPIE 6557, Head- and Helmet-Mounted Displays XII: Design and Applications, 65570O (1 May 2007); doi: 10.1117/12.719115
Show Author Affiliations
Patrick Flanagan, Deakin Univ. (Australia)
Geoffrey W. Stuart, Defence Science and Technology Organisation (Australia)
Peter Gibbs, Defence Science and Technology Organisation (Australia)

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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