US5548330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image pickup device for generating a corrected luminance signal
Assignee: Canon Inc
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Filing: 1993-12-22
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Granted: 1996-08-20
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Expires: 2013-12-22
Abstract
Abstract In an image pickup device for generating a corrected luminance signal by subtracting two color difference signals as correction signals from a luminance signal, a correction signal is generated by base-clipping at least one of the two color difference signals.
Inventors
- 👤 Teruo Hieda
- 👤 Makoto Shimokoriyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:32
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/14; H04N5/20; H04N23/00; H04N23/80; H04N23/84; H04N23/843; H04N25/00; H04N25/10; H04N25/11; H04N25/13; H04N25/135; H04N25/136; H04N9/00; H04N9/77; H04N5/205; H04N5/208
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
64 words
An image pickup device for generating a corrected luminance signal by subtracting two color difference signals, as correction signals, from a luminance signal, comprising: means for generating a correction signal by base-clipping at least one of the two color difference signals without eliminating an entire negative portion thereof; and correction operating means for correcting the luminance signal on the basis of the correction signal.
Claim 2
Dependent Claim
64 words
An image pickup device for generating a corrected luminance signal by subtracting two color difference signals, as correction signals, from a luminance signal, comprising: means for generating a correction signal by base-clipping at least one of the two color difference signals without eliminating an entire negative portion thereof; and correction operating means for correcting the luminance signal on the basis of the correction signal.
Claim 3
Dependent Claim
23 words
A device according to claim 1, wherein the correction signal is used as a correction signal after being passed through a coefficient unit.
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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) | 1999-08-20 | 2000-02-19 | 2000-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-20 | 2004-02-19 | 2004-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-20 | 2008-02-19 | 2008-08-20 | $7700.00 | Window Closed / Lapsed |