Hyperstereopsis in helmet-mounted NVDs: time to contact estimation

Patrick Flanagan; Geoffrey W. Stuart; Peter Gibbs

doi:10.1117/12.719115

1 May 2007 Hyperstereopsis in helmet-mounted NVDs: time to contact estimation

Patrick Flanagan, Geoffrey W. Stuart, Peter Gibbs

Proceedings Volume 6557, Head- and Helmet-Mounted Displays XII: Design and Applications; 65570O (2007) https://doi.org/10.1117/12.719115
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States

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.

Citation Download Citation

Patrick Flanagan, Geoffrey W. Stuart, and Peter Gibbs "Hyperstereopsis in helmet-mounted NVDs: time to contact estimation", Proc. SPIE 6557, Head- and Helmet-Mounted Displays XII: Design and Applications, 65570O (1 May 2007); https://doi.org/10.1117/12.719115

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