US4055833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of deriving characteristic contours from a colored picture
Assignee: ESSELTE SECURITY SYSTEMS A Co OF SWEDEN AB
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Filing: 1975-06-10
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Granted: 1977-10-25
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Expires: 1995-06-10
Abstract
Abstract A method of deriving characteristic curves from a colored photograph of an object, which comprises making an image comprising only one of the basic colors of the colored photograph, the contrast of said image being enhanced, so that only the areas of the object which are most strongly colored in said color are reproduced.
Inventors
- 👤 Rolf Eric Rothfjell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:49
CPC Classifications
G; G03; G03B; G03B15/00; G03B17/00; G03B17/24; G03B33/00; G03C; G03C7/00; G06; G06V; G06V40/00; G06V40/10; G06V40/16; G06V40/161; G06V40/166; G07; G07C; G07C9/00; G07C9/20; G07C9/22; G07C9/25; G03B2217/00; G03B2217/24; G03B2217/241; Y; Y10; Y10S; Y10S283/00; Y10S283/904
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
56 words
A method of producing an identity document comprising the steps of making corresponding multicolored and blue monochromatic photographs of the face of a person to be identified, the monochromatic photograph being made with the contrast of the image enhanced so that only areas of great color intensity are reproduced, and mounting both photographs on a support.
Claim 2
Independent Claim
56 words
A method of producing an identity document comprising the steps of making corresponding multicolored and blue monochromatic photographs of the face of a person to be identified, the monochromatic photograph being made with the contrast of the image enhanced so that only areas of great color intensity are reproduced, and mounting both photographs on a support.
Claim 3
Dependent Claim
16 words
The method of claim 1 in which the multicolored and the monochromatic photographs are taken simultaneously.
Claim 4
Dependent Claim
16 words
The method of claim 1 in which the monochromatic photograph is made from the multicolored photograph.
Claim 5
Dependent Claim
44 words
An identity document comprising a support mounting corresponding multicolored and monochromatic photographs of the face of the person to be identified, the monochromatic photograph having been made with the contrast of the image enhanced so that only areas of great color intensity are reproduced.
Claim 6
Dependent Claim
44 words
An identity document comprising a support mounting corresponding multicolored and monochromatic photographs of the face of the person to be identified, the monochromatic photograph having been made with the contrast of the image enhanced so that only areas of great color intensity are reproduced.
Claim 7
Dependent Claim
25 words
The identity document as claimed in claim 4 having corresponding multicolored and monochromatic photographs of the face from a plurality of different points of view.
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) | 1980-10-24 | 1981-04-25 | 1981-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-24 | 1985-04-25 | 1985-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-24 | 1989-04-25 | 1989-10-25 | $7700.00 | Window Closed / Lapsed |