US3947833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic target detection system
Assignee: United States Department of the Navy
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Filing: 1974-11-20
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Granted: 1976-03-30
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Expires: 1994-11-20
Abstract
Abstract An automatic target detector for determining the probability that an objectn 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.
Inventors
- 👤 Royal W. Eckstein, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:13
CPC Classifications
G; G06; G06T; G06T7/00; G06V; G06V10/00; G06V10/10; G06V10/20; G06V10/255; G06V10/70; G06V10/74; G06V10/75
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
136 words
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.
Claim 2
Independent Claim
136 words
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.
Claim 3
Dependent Claim
35 words
A device for recognizing a swimmer as set forth in claim 1 having means for multiplying said first and second probability factors to provide a joint probability factor that a target is not a swimmer.
Claim 4
Dependent Claim
37 words
A device recognizing a swimmer as set forth in claim 1 wherein said encoded target area is converted to digital form and stored in said memory means and wherein said reference scenes are provided in digital form.
Claim 5
Dependent Claim
20 words
A device for recognizing a swimmer as set forth in claim 1 wherein said classification means is a digital comparator.
Claim 6
Dependent Claim
31 words
A device for recognizing a swimmer as set forth in claim 4 wherein an identification device is energized when said digital comparator correlates said encoded target area and said reference scenes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-30 | 1979-09-29 | 1980-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-30 | 1983-09-29 | 1984-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-30 | 1987-09-29 | 1988-03-30 | $7700.00 | Window Closed / Lapsed |