US5581298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color signal processing apparatus using plural luminance signals
Assignee: Canon Inc
•
Filing: 1995-10-12
•
Granted: 1996-12-03
•
Expires: 2015-10-12
Abstract
Abstract Disclosed is a color signal processing apparatus in which at least three types of color signals corresponding to filters are received from a solid-state image pickup element on which at least three types of color filters are formed, and linear matrix conversion of the at least three types of color signals determined by spectral characteristics of the corresponding color filters is performed to generate R, G, and B signals.
Inventors
- 👤 Takashi Sasaki
- 👤 Akihiko Shiraishi
- 👤 Mayumi Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:00
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/80; H04N23/84; H04N23/843; H04N23/86; H04N23/88; H04N25/00; H04N25/10; H04N25/11; H04N25/13; H04N25/135; H04N25/136
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
101 words
An image pickup apparatus, comprising: (a) image pickup means for photoelectrically converting light from an object, said image pickup means having color filter in which four kinds of colors including complementary colors are arranged in mosaic; (b) interpolation means for generating four kinds of color signals corresponding respectively to said four kinds of colors using an interpolation operation; (c) means for generating a plurality of primary color signals by matrix converting the four kinds of color signals interpolated by said interpolation means; and (d) non-linear conversion means for non-linearly converting said plurality of primary color signals to produce a video signal.
Claim 2
Dependent Claim
101 words
An image pickup apparatus, comprising: (a) image pickup means for photoelectrically converting light from an object, said image pickup means having color filter in which four kinds of colors including complementary colors are arranged in mosaic; (b) interpolation means for generating four kinds of color signals corresponding respectively to said four kinds of colors using an interpolation operation; (c) means for generating a plurality of primary color signals by matrix converting the four kinds of color signals interpolated by said interpolation means; and (d) non-linear conversion means for non-linearly converting said plurality of primary color signals to produce a video signal.
Claim 3
Dependent Claim
16 words
An image pickup apparatus according to claim 1, wherein said image pickup means includes a CCD.
Claim 4
Dependent Claim
20 words
An image pickup apparatus according to claim 1, wherein said four kinds of colors are yellow, magenta, green and cyan.
Claim 5
Dependent Claim
21 words
An image pickup apparatus according to claim 1, wherein said plurality of primary color signals includes R, G and B signals.
Claim 6
Dependent Claim
22 words
An image pickup apparatus according to claim 1, wherein the matrix conversion is performed by using a table having a predetermined coefficient.
Claim 7
Dependent Claim
24 words
An image pickup apparatus according to claim 1, further comprising means for converting the output of said image pickup means into a digital signal.
Claim 8
Dependent Claim
111 words
A color video camera, comprising: (a) image pickup means for photoelectrically converting light from an object, said image pickup means having a color filter in which four kinds of colors including complementary colors are arranged in mosaic; (b) interpolation means for generating color signals corresponding respectively to the four kinds of colors using an interpolation operation; (c) means for generating a plurality of primary color signals by matrix converting the four kinds of color signals interpolated by said interpolation means; (d) non-linear conversion means for non-linearly converting said plurality of primary color signals to produce a video signal; and (e) means for changing coefficients of a matrix of the matrix conversion.
Claim 9
Dependent Claim
111 words
A color video camera, comprising: (a) image pickup means for photoelectrically converting light from an object, said image pickup means having a color filter in which four kinds of colors including complementary colors are arranged in mosaic; (b) interpolation means for generating color signals corresponding respectively to the four kinds of colors using an interpolation operation; (c) means for generating a plurality of primary color signals by matrix converting the four kinds of color signals interpolated by said interpolation means; (d) non-linear conversion means for non-linearly converting said plurality of primary color signals to produce a video signal; and (e) means for changing coefficients of a matrix of the matrix conversion.
Claim 10
Dependent Claim
33 words
A color video camera according to claim 7, wherein said changing means detects color temperature of the object and changes the coefficients of the matrix on the basis of the detected color temperature.
Claim 11
Dependent Claim
16 words
A color video camera according to claim 7, wherein said image pickup means includes a CCD.
Claim 12
Dependent Claim
20 words
A color video camera according to claim 7, wherein said four kinds of colors are yellow, magenta, green and cyan.
Claim 13
Dependent Claim
21 words
A color video camera according to claim 7, wherein said plurality of primary color signals includes R, G and B signals.
Claim 14
Dependent Claim
24 words
A color video camera according to claim 7, further comprising means for converting the output of said image pickup means into a digital signal.
References Cited (Backward Citations)
US4160264A
Cited
GB2014821A
Cited
US4631578A
Cited
US4700219A
Cited
US4941037A
Cited
US4716455A
Cited
US4682210A
Cited
US4768084A
Cited
GB2196507A
Cited
US4805011A
Cited
EP0262623A2
Cited
US4833527A
Cited
US4975769A
Cited
US4945406A
Cited
US5043803A
Cited
JPH0492591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-12-03 | 2000-06-03 | 2000-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-03 | 2004-06-03 | 2004-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-03 | 2008-06-03 | 2008-12-03 | $7700.00 | Window Closed / Lapsed |