Hyperstereopsis in helmet-mounted NVDs : absolute distance perception

Flanagan, Patrick, Stuart, Geoffrey W. and Gibbs, Peter 2007, Hyperstereopsis in helmet-mounted NVDs : absolute distance perception, in SPIE 2007 : Head- and helmet-mounted displays XII : design and applications : 10-11 April, 2007, Orlando, Florida, USA, SPIE, Washington, D.C., pp. 1-7, doi: 10.1117/12.729603.

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Title Hyperstereopsis in helmet-mounted NVDs : absolute distance perception
Author(s) Flanagan, Patrick
Stuart, Geoffrey W.
Gibbs, Peter
Conference name Society of Photo-optical Instrumentation Engineers (2007 : Orlando, Florida)
Conference location Orlando, Florida
Conference dates 10-11 April 2007
Title of proceedings SPIE 2007 : Head- and helmet-mounted displays XII : design and applications : 10-11 April, 2007, Orlando, Florida, USA
Editor(s) Brown, Randall W.
Publication date 2007
Series Proceedings of SPIE--the International Society for Optical Engineering ; v. 6557
Start page 1
End page 7
Publisher SPIE
Place of publication Washington, D.C.
Keyword(s) night vision devices
distance perception
Summary Modern helmet-mounted night vision devices, such as the Thales TopOwl helmet, project imagery from intensifiers mounted on the side of the helmet onto the helmet faceplate. The increased separation of the cameras induces hyperstereopsis - the exaggeration of the stereoscopic disparities that support the perception of relative depth around the point of fixation. Increased camera separation may also affect absolute depth perception, because it increases the amount of vergence (crossing) of the eyes required for binocular fusion, and because the differential perspective from the viewpoints of the two eyes is increased. The effect of hyperstereopsis on the perception of absolute distance was investigated using a large-scale stereoscopic display system. A fronto-parallel textured surface was projected at a distance of 6 metres. Three stereoscopic viewing conditions were simulated - hyperstereopsis (four times magnification), normal stereopsis, and hypostereopsis (one quarter magnification). The apparent distance of the surface was measured relative to a grid placed in a virtual "leaf room" that provided rich monocular cues, such as texture gradients and linear perspective, to absolute distance as well as veridical sterescopic disparity cues. The different stereoscopic viewing conditions had no differential effect on the apparent distance of the textured surface at this viewing distance
ISBN 9780819466792
Language eng
DOI 10.1117/12.729603
Field of Research 170112 Sensory Processes, Perception and Performance
HERDC Research category E2 Full written paper - non-refereed / Abstract reviewed
Copyright notice ©2007, SPIE
Persistent URL http://hdl.handle.net/10536/DRO/DU:30014846

Document type: Conference Paper
Collections: Faculty of Health
School of Psychology
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