An Investigation of Visual Cues used to Create and Support Frames of Reference and Visual Search Tasks in Desktop Virtual Environments |
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Authors: | S S Morar R D Macredie T Cribbin |
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Affiliation: | (1) Department of Information Systems and Computing, Brunel University, Uxbridge, UK, |
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Abstract: | Visual depth cues are combined to produce the essential depth and dimensionality of Desktop Virtual Environments (DVEs). This
study discusses DVEs in terms of the visual depth cues that create and support perception of frames of references and accomplishment
of visual search tasks. This paper presents the results of an investigation that identifies the effects of the experimental
stimuli positions and visual depth cues: luminance, texture, relative height and motion parallax on precise depth judgements
made within a DVE. Results indicate that the experimental stimuli positions significantly affect precise depth judgements,
texture is only significantly effective for certain conditions, and motion parallax, in line with previous results, is inconclusive
to determine depth judgement accuracy for egocentrically viewed DVEs. Results also show that exocentric views, incorporating
relative height and motion parallax visual cues, are effective for precise depth judgements made in DVEs. The results help
us to understand the effects of certain visual depth cues to support the perception of frames of references and precise depth
judgements, suggesting that the visual depth cues employed to create frames of references in DVEs may influence how effectively
precise depth judgements are undertaken. |
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Keywords: | Depth Perception Desktop Virtual Environments Frames of Reference Motion Parallax Visual Depth Cues Visual Search Tasks |
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