Patent US4652929A successfully refreshed from Google Patents.
US4652929A
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Method of and apparatus for making video images
Assignee: Agfa Gevaert AG
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Filing: 1985-10-10
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Granted: 1987-03-24
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Expires: 2005-10-10
Abstract
Abstract A method of producing a video picture of an image comprises the steps of lighting the image at a light level equal to about a predetermined small fraction of the light level necessary to produce picture-element signals of an amplitude sufficient to process. The thus lighted image is then scanned and electrooptically reduced to a succession of sets of analog picture-element signals a predetermined number N of times, the number N being equal to the inverse of the predetermined small fraction. Thus for each portion of the image there is a respective picture-element signal in each succession. The signals of each image portion are then projected onto the same portion of a light-sensitive medium to form a picture of the image thereon. This medium is capable of adding each of the signals of each set to the signals of the other sets corresponding to the same image portion.
Inventors
- 👤 Otto Stemme
- 👤 Eduard Wagensonner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:55
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/48; H04N1/486; H04N1/40; H04N1/409; H04N1/4092
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
147 words
A method of producing a video picture of an image, the method comprising the steps of: lighting the image at a light level equal to about a predetermined small fraction of the light level necessary to produce picture-element signals of an amplitude sufficient to process; scanning the image and electrooptically reducing it to a succession of sets of analog picture-element signals a predetermined number N of times, the number N being equal to the inverse of the predetermined small fraction, whereby for each portion of the image there is a respective picture-element signal in each succession; providing a light-sensitive medium capable of adding each of the signals of each set to the signals of the other sets corresponding to the same image portion; and projecting the signals of each image portion onto the same portion of the light-sensitive medium to form a picture of the image thereon.
Claim 2
Independent Claim
147 words
A method of producing a video picture of an image, the method comprising the steps of: lighting the image at a light level equal to about a predetermined small fraction of the light level necessary to produce picture-element signals of an amplitude sufficient to process; scanning the image and electrooptically reducing it to a succession of sets of analog picture-element signals a predetermined number N of times, the number N being equal to the inverse of the predetermined small fraction, whereby for each portion of the image there is a respective picture-element signal in each succession; providing a light-sensitive medium capable of adding each of the signals of each set to the signals of the other sets corresponding to the same image portion; and projecting the signals of each image portion onto the same portion of the light-sensitive medium to form a picture of the image thereon.
Claim 3
Dependent Claim
14 words
The video picture-producing method of claim 1 wherein N is between 10 and 100.
Claim 4
Independent Claim
108 words
An apparatus for producing a video picture of an image, the apparatus comprising: means for scanning the image and electrooptically reducing it to a succession of sets of analog picture-element signals a predetermined number N of times, whereby for each portion of the image there is a respective picture-element signal in each succession; means for lighting the image at a light level equal to about 1/N times the light level necessary to produce picture-element signals of an amplitude sufficient to process; a light-sensitive medium capable of adding each of the signals of each set to the signals of the other sets corresponding to the same image portion; and.
Claim 5
Independent Claim
108 words
An apparatus for producing a video picture of an image, the apparatus comprising: means for scanning the image and electrooptically reducing it to a succession of sets of analog picture-element signals a predetermined number N of times, whereby for each portion of the image there is a respective picture-element signal in each succession; means for lighting the image at a light level equal to about 1/N times the light level necessary to produce picture-element signals of an amplitude sufficient to process; a light-sensitive medium capable of adding each of the signals of each set to the signals of the other sets corresponding to the same image portion; and.
Claim 6
Dependent Claim
18 words
The video picture-producing apparatus defined in claim 3 wherein the means for electrooptically reducing is a charge-coupled device.
Claim 7
Dependent Claim
17 words
The video picture-producing apparatus defined in claim 3 wherein N is equal to between 10 and 100.
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) | 1990-03-23 | 1990-09-22 | 1991-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-23 | 1994-09-22 | 1995-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-23 | 1998-09-22 | 1999-03-24 | $7700.00 | Window Closed / Lapsed |