Search Performance using Imaging Displays with Restricted Field of View

Exécution de Tâches de Recherche à l’Aide d’Affichages d’Imagerie à Champ de Vision Limité.

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Authors
  1. Crebolder, J.M.
  2. Unruh, T.D.M.
  3. McFadden, S.M.
Corporate Authors
Defence R&D Canada - Toronto, Toronto ONT (CAN);Toronto Univ, Toronto ONT (CAN)
Abstract
Search performance using optical imaging systems with restricted viewing area was investigated using a prototype interface and controls of the airborne Enhanced Low-light Level Visible and Infrared Surveillance System (ELVISS). Three different search environments were simulated, one over water, one over land, and one designed specifically to search for objects with retro-reflective properties. Field of view (FOV) of the images from the two ELVISS sensors, a Forward-Looking InfraRed sensor, and an Active-Gated TV was varied. The study suggests that the most effective FOV for search using imaging systems depends on the type of search and/or the sensor mode employed. When using a laser illuminator beam to search for targets with retro-reflective properties, more targets were accurately identified when FOV was wide (20°) than when it was narrower (2°). In other tasks, when the beam was not active, a narrow/wide FOV range of 5° and 20° was more effective than lower (2°:10°) or higher (15°:35°) viewing fields.

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Keywords
field of view;target detection;airborne search;optical imaging systems;retroreflective;continuous field of view;discrete field of view
Report Number
DRDC-TORONTO-TR-2003-007 — Technical Report
Date of publication
01 Apr 2003
Number of Pages
48
DSTKIM No
CA023717
CANDIS No
521099
Format(s):
Electronic Document(PDF);CD ROM

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