Share Email Print

Proceedings Paper

The legibility of HMD symbology as a function of background local contrast
Author(s): Thomas H. Harding; John S. Martin; Clarence E. Rash
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

As the Army increases its reliance upon helmet mounted displays (HMD), it is paramount that HMDs are developed that meet the operational needs of the warfighter. In see-through HMDs, symbology is overlaid or added to the see-through background. For the symbology to be seen and understood, the symbology must have sufficient contrast to stand-out from the background and be clearly recognized. In an earlier paper, we showed that the quality of see-through symbology was greatly influenced by the complexity of natural backgrounds. Complexity was characterized by the standard deviation of small patches (patches subtending about 1.5°). A better assessment of scene complexity as a function of local contrast is required for the development of HMD luminance specifications. Here we evaluate the small patch luminance and complexity of natural scenes in an attempt to quantify the luminance requirements for HMDs.

Paper Details

Date Published: 4 May 2007
PDF: 8 pages
Proc. SPIE 6557, Head- and Helmet-Mounted Displays XII: Design and Applications, 65570D (4 May 2007); doi: 10.1117/12.719657
Show Author Affiliations
Thomas H. Harding, U.S. Army Aeromedical Research Lab. (United States)
John S. Martin, U.S. Army Aeromedical Research Lab. (United States)
Clarence E. Rash, U.S. Army Aeromedical Research Lab. (United States)

Published in SPIE Proceedings Vol. 6557:
Head- and Helmet-Mounted Displays XII: Design and Applications
Randall W. Brown; Colin E. Reese; Peter L. Marasco; Thomas H. Harding, Editor(s)

© SPIE. Terms of Use
Back to Top