Image processing utilizing an object data store to determine information about a viewed object
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United States of America Patent
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-
Jul 23, 1991
Grant Date -
N/A
app pub date -
Nov 7, 1989
filing date -
Nov 14, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Apparatus for processing the image seen by a television camera viewing the surroundings of an aircraft has a store of topographical mapping information and object data stores which contain information about the appearance, location and size of objects in the area to be viewed. The apparatus derives information as to the location of an object in the field of view and determines where the line of sight of the object from the camera intercepts the stored topographical mapping. The range of the object is determined trigonometrically from its location relative to a corresponding part of the stored topographical mapping and the position of the aircraft. New objects are indicated when they are not present in the object data stores. The angle subtended by an identified object is compared with the known size of the object to provide another indication of range. An indication of the size of the object can be provided from knowledge of its range and the angle subtended.
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