DocumentCode :
883783
Title :
Trade-off between resolution and interactivity in spatial task performance
Author :
Smets, Gerda J F ; Overbeeke, Kees J.
Author_Institution :
Delft Univ. of Technol., Netherlands
Volume :
15
Issue :
5
fYear :
1995
fDate :
9/1/1995 12:00:00 AM
Firstpage :
46
Lastpage :
51
Abstract :
Virtual reality displays usually lag far behind classical computer graphics displays in static image quality parameters, such as resolution. Both the popular press and scientific papers often stress that resolution will have to increase greatly before users can experience virtual environments as “the real thing”. Nevertheless, it is already possible to do some useful work in VR environments. The point we experimentally demonstrate here is that resolution is much less important for interactive tasks that employ immersive VR, where users can explore the environment by moving their heads and bodies, than it is in classical computer graphics applications, where users can only explore by gazing at a single picture. In the context of unmanned aerial vehicles, frame rate (read: passive camera movement) is more important than resolution for target detection, recognition, designation, and tracking. In the experiments reported here, we investigated the relative importance of various image parameters like spatial resolution (number of pixels per video frame), intensity resolution (number of gray levels per pixel), and temporal resolution (number of frame updates per second). Most experimental data concerning these resolutions come from classical psychophysics. However, experimental conditions in classical psychophysics feature stationary observers looking at short-term, pointlike flashes on stationary displays, and are thus far more representative of human interaction with pictures and photographs than with highly interactive systems like those employed in virtual reality
Keywords :
realistic images; virtual reality; classical psychophysics; intensity resolution; interactivity; passive camera movement; resolution; spatial task performance; static image quality parameters; temporal resolution; virtual environments; virtual reality displays; Computer displays; Computer graphics; Image quality; Image resolution; Pixel; Psychology; Spatial resolution; Stress; Virtual environment; Virtual reality;
fLanguage :
English
Journal_Title :
Computer Graphics and Applications, IEEE
Publisher :
ieee
ISSN :
0272-1716
Type :
jour
DOI :
10.1109/38.403827
Filename :
403827
Link To Document :
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