US4727434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image processing apparatus for rapid production of a hard copy of a video image in which input image signal processing parameters are set while a record medium is being positioned at a recording position
Assignee: Canon Inc
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Filing: 1985-03-08
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Granted: 1988-02-23
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Expires: 2005-03-08
Abstract
Abstract An image processing apparatus can rapidly produce a hard copy of a video image by setting parameters for processing an input image signal while a record medium is being advanced to an initial recording position. The parameters which are set are upper and lower limits for normalizing the input image signal, and are determined by performing histogram processing on the input image signal. In addition, the processing apparatus may include a plurality of combined normalization and gamma correction reference tables for processing the input image signal. One of the plurality of combined reference tables is selected on the basis of the upper and lower limits determined by the histogram processing of the input image signal. Alternatively, separate normalization and gamma correction reference tables may be used.
Inventors
- 👤 Hideaki Kawamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:45
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/6016; H04N1/6019; H04N1/40; H04N1/407; H04N1/4072; H04N1/4074
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
78 words
An image recording apparatus comprising: recording means for recording on a record medium a visual image represented by an image signal; processing means for processing the image signal for recording by said recording means; positioning means for positioning the record medium at a recording position of said recording means; setting means for setting parameters necessary for said processing means to process the image signal; and control means for activating said setting means while said positioning means is operating.
Claim 2
Dependent Claim
78 words
An image recording apparatus comprising: recording means for recording on a record medium a visual image represented by an image signal; processing means for processing the image signal for recording by said recording means; positioning means for positioning the record medium at a recording position of said recording means; setting means for setting parameters necessary for said processing means to process the image signal; and control means for activating said setting means while said positioning means is operating.
Claim 3
Dependent Claim
23 words
An image recording apparatus according to claim 1, wherein said setting means sets upper and lower limits for normalization of the image signal.
Claim 4
Dependent Claim
24 words
An image recording apparatus according to claim 1, wherein said positioning means includes conveying means for conveying the record medium to the recording position.
Claim 5
Dependent Claim
16 words
An image recording apparatus according to claim 3, wherein said conveying means includes a stepping motor.
Claim 6
Dependent Claim
36 words
An image recording apparatus according to claim 1, wherein said setting means includes histogram processing means for producing a histogram representing a frequency distribution of each of a plurality of density levels of the image signal.
Claim 7
Dependent Claim
25 words
An image recording apparatus according to claim 5, wherein said positioning means includes a stepping motor for conveying the record medium to the recording position.
Claim 8
Dependent Claim
24 words
An image recording apparatus according to claim 6, wherein said control means alternately and repeatedly operates said histogram processing means and said stepping motor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-22 | 1991-08-24 | 1992-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-22 | 1995-08-24 | 1996-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-22 | 1999-08-24 | 2000-02-23 | $7700.00 | Window Closed / Lapsed |