TARGET DETECTION AND RECOGNITION STUDY.
Final rept. for 22 Nov 61-22 Aug 62.
RADIO CORP OF AMERICA BURLINGTON MASS AEROSPACE SYSTEMS DIV
Pagination or Media Count:
The objective of the present research was to determine the amount of image degradation that can be tolerated by an operator during his use of a television monitor to make navigational corrections. The images employed were presented for durations not exceeding 5.5 seconds. Therefore, although the display was not continuously changing, the decision time available to the operator was realistically brief. It is the judgment of the authors that the task of the subject in the laboratory situation was quite closely related to that to be expected in the field situation, although simplified to permit systematic evaluation. The data have provided unambiguous indications of the effects of varying such factors as line coverage, random noise and terrain complexity. Terrain sector localization can be performed well even when there is appreciable random noise if the imaging system is capable of 250-line coverage or better. Below that value, performance of the task rapidly worsens, even under the most favorable condition of signal-to-noise ratio. Although the subjects differed in their ability to perform the task, as evidenced by a significant difference in variance among subjects, their performance was equivalent with respect to the effects of the major variables. It is therefore predicted that the findings should generalize to the performance of any subject of normal perceptual ability.