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US 3,947,833 AGranted
Automatic target detection system
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorRoyal W. Eckstein, Jr.
Life of this patent
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Abstract
An automatic target detector for determining the probability that an object n water is a swimmer. An electro-optical sensor is provided for viewing a target in water and contrast and width of the target are measured to assign probabilities that a target is a swimmer. A target which shows acceptable contrast and width is encoded and the encoded information is compared with stored reference scenes to make a final determination of whether or not a target is a swimmer.
Claims5
A device for recognizing a swimmer in water comprising,
- an electro-optical sensor providing a video display for viewing a target in water,
- first means for measuring the contrast of said target and assigning a first probability factor that said target is not a swimmer and measuring the width of said target and assigning a second probability factor that said target is not a swimmer,
- second means for encoding an area containing a target when said first means determines that said target has a probability of being a swimmer, said encoded target area being a portion of said video display,
- memory means for retaining said encoded target area,
- means providing reference scenes characteristic of a swimmer, and
- classification means for comparing said encoded target area with said reference scenes for determining whether said target is a swimmer.
3 more elements
Dependencies are inferred from the claim text.