Human Factors Requirements for Electronic Displays: Effects of S/N Ratio and TV Lines Over Target

摘要

The study was performed as part of a McDonnell Aircraft Company Reconnaissance Laboratory program to determine the observer requirements for effective utilization of electronic reconnaissance displays. The approach was to evaluate the display characteristics, identify their contributions to observer performance and analyze them to identify the variables which are the effective stimuli operating at the observer-display interface to control observer performance. Display characteristics studied were signal to noise (S/N) ratio and TV lines over target. Twelve subjects viewed a high-fidelity reconnaissance TV display which simulated real time operations. Images having an average of 6, 9, and 11 TV lines over the target successively appeared at S/N ratios of 4, 8, 16, 32, 64 and 100 to 1. The observer located discrete targets with one of three levels of response certainty; detection, recognition or identification. (Author)