Detection of Multiple-Vehicle Targets in Realistic Terrain.
Final technical rept. Jul 77-Apr 78,
HUGHES AIRCRAFT CO CULVER CITY CA DISPLAY SYSTEMS DEPT
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The interactive effects of target and background characteristics upon visual target acquisition were investigated. Five multiple-target conditions that varied in number and configuration single tank, group of 3 tanks, convoy of 3 tanks, group of 9 tanks, and convoy of 9 tanks were embedded into oblique aerial photographs of real terrain. Proximity of the targets to major roads in each scene was manipulated to assess the effects of local context on detection performance. Terrain complexity was evaluated by a subjective scale of scene heterogeneity. Results from a visual search experiment indicated that performance improved as the number of tanks comprising a target increased. An interaction between number of targets and proximity to roads suggested that local context is a relatively more important performance predictor when searching for single tanks than when searching for multiple targets. The heterogeneity measure was found to be an inadequate predictor of detection performance. An approach for the development and implementation of valid predictors of detection performance was suggested. Author
- Anatomy and Physiology