GVU Technical Report Number:
GIT-GVU-96-04
Title:
Effectiveness of Peripheral Level of Detail Degradation When Used With
Head-Mounted Displays
Authors:
Benjamin Watson
Neff Walker
Larry F. Hodges
Aileen Worden
Abstract:
Two user studies were performed to evaluate the effectiveness of level of
detail (LOD) degradation in the periphery of head-mounted displays. In
the first study, spatial detail was degraded by reducing resolution. In
the second study, detail was degraded in the color domain by using
grayscale in the periphery. In each study, ten subjects were given a
complex search task that required users to indicate whether or not a
target object was present among distractors. Subjects used several
different displays varying in the amount of detail presented. Frame
rate, object location, subject input method, and order of display use
were all controlled. Primary dependent measures were search time on
correctly performed trials, and the percentage of all trials correctly
performed. Results indicated that peripheral LOD degradation can be
used to reduce visual complexity by almost half without hurting
performance. Users were more sensitive to decreases in LOD than
increases in degraded display area.
Keywords:
Level of detail, virtual environments, computer graphics, usability, search
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