Matrix Element Display Devices and Their Application to Airborne Weapon Systems,
Abstract
A study was performed to determine the impact of two important matrix display design variables on tactical target recognition performance. Element density (i.e., the number of individual display resolution elements per degree as viewed by the observer) and the percent active area on the display surface were experimentally manipulated by adjusting the viewing distance from a rear projection screen over which a grid mask was placed. The targets were presented to subjects using zoom imagery at a simulated slant range which initially precluded recognition. As the target size increased, subjects were asked to press a remote projector control button when they were virtually certain of the correct response. The results indicate little effect of percent active area (i.e., down to 55 percent on target recognition performance for element angular subtense values between 0.75 and 3.0 minutes of arc (corresponding to element densities of from approximately 165 to 40 elements per inch at a 28 inch viewing distance). The effects of element density, however, were large and conformed to expectations derived from the limiting resolution of the visual system. Geometric mathematical derivations are provided for the relationships between element density, viewing distance, target size, sensor field of view, total number of display elements and slant range at time of target recognition. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1976
- Accession Number
- ADA027449
Entities
People
- Harry L. Task
- Wayne L. Martin
Organizations
- Air Force Research Laboratory