Patent US5648818A successfully refreshed from Google Patents.
US5648818A
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Image pickup apparatus having color separation matrix
Assignee: Canon Inc
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Filing: 1993-10-06
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Granted: 1997-07-15
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Expires: 2013-10-06
Abstract
Abstract An image pickup apparatus including an image pickup device to convert an image pickup light from an object to be photographed into an electric signal, a signal processing circuit to obtain a luminance component signal and color difference component signals on the basis of an output of the image pickup device and a color separation matrix circuit to obtain chrominance signals from the luminance component signal and the color difference component signals. Matrix coefficients in the color separation matrix circuit are determined so as to obtain the optimum chrominance signals when the luminance component signal and the color difference component signals obtained by photographing an object of each color are color separated.
Inventors
- 👤 Tsutomu Fukatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:01
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/80; H04N23/84; H04N23/85; H04N25/00; H04N25/10; H04N25/11; H04N25/13; H04N25/135; H04N25/136
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A solid-state image pickup apparatus having (a) color filters for transmitting different color lights, which filters are sequentially arranged on photosensitive devices in a solid-state image pickup device, (b) means for forming an object image onto the solid-state image pickup device, and (c) means for executing arithmetic operating processes to multiply predetermined arithmetic operation coefficients to output signals corresponding to the different color lights of the solid-state image pickup device, thereby obtaining primary color components, said apparatus comprising: arithmetic operation coefficient adjusting means for projecting color compositions of the solid-state image pickup device into a space that is not independent to each of the primary color component signals and incorporating adjustment coefficients and, after that, for again projecting the color compositions into the primary color component space, and for adjusting the arithmetic operation coefficients by magnitudes of the adjustment coefficients.
Claim 2
Dependent Claim
140 words
A solid-state image pickup apparatus having (a) color filters for transmitting different color lights, which filters are sequentially arranged on photosensitive devices in a solid-state image pickup device, (b) means for forming an object image onto the solid-state image pickup device, and (c) means for executing arithmetic operating processes to multiply predetermined arithmetic operation coefficients to output signals corresponding to the different color lights of the solid-state image pickup device, thereby obtaining primary color components, said apparatus comprising: arithmetic operation coefficient adjusting means for projecting color compositions of the solid-state image pickup device into a space that is not independent to each of the primary color component signals and incorporating adjustment coefficients and, after that, for again projecting the color compositions into the primary color component space, and for adjusting the arithmetic operation coefficients by magnitudes of the adjustment coefficients.
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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) | 2000-07-14 | 2001-01-13 | 2001-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-07-14 | 2005-01-13 | 2005-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-07-14 | 2009-01-13 | 2009-07-15 | $7700.00 | Window Closed / Lapsed |