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Proceedings Paper

Compensation for the effects of time delay in a helmet-mounted display: perceptual adaptation versus algorithmic prediction
Author(s): W. Todd Nelson; Lawrence J. Hettinger; Michael W. Haas; Christopher J. Russell; Joel S. Warm; William N. Dember; Thomas A. Stoffregen
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Paper Abstract

Virtual environment technologies, such as helmet-mounted displays (HMDs), are challenged by problems involving time delay--the time between an input to a system, and its corresponding output. An experiment was conducted to evaluate two methods of time delay compensation--algorithmic prediction and perceptual adaptation--during a time-delayed, head- slaved tracking task using an HMD. Predictive algorithms attempt to compensate for time delays by predicting future head position in order to update images effectively in the HMD. Perceptual adaptation refers to the ability of humans to adapt to the time delay by modifying their tracking strategies. Subjects were assigned to either a perceptual adaptation or algorithmic prediction condition, and participated in four experimental sessions during which they attempted to center a reticle over a moving circular target using a HMD. Tracking performance was evaluated in terms of RMS error, and the adequacy of the adaptation and prediction solutions was evaluated by several comparisons of tracking efficiency within and between sessions. Results indicated that the algorithmic prediction solution was superior to the perceptual adaptation solution for compensating for the effects of time delay in a head-slaved tracking task.

Paper Details

Date Published: 22 May 1995
PDF: 11 pages
Proc. SPIE 2465, Helmet- and Head-Mounted Displays and Symbology Design Requirements II, (22 May 1995); doi: 10.1117/12.209733
Show Author Affiliations
W. Todd Nelson, Logicon Technical Services, Inc. (United States)
Lawrence J. Hettinger, Logicon Technical Services, Inc. (United States)
Michael W. Haas, Air Force Armstrong Lab. (United States)
Christopher J. Russell, Air Force Armstrong Lab. (United States)
Joel S. Warm, Univ. of Cincinatti (United States)
William N. Dember, Univ. of Cincinatti (United States)
Thomas A. Stoffregen, Univ. of Cincinatti (United States)

Published in SPIE Proceedings Vol. 2465:
Helmet- and Head-Mounted Displays and Symbology Design Requirements II
Ronald J. Lewandowski; Wendell Stephens; Loran A. Haworth, Editor(s)

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