US5262849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital camera processing device having variably settable interpolation
Assignee: Canon Inc
•
Filing: 1991-10-30
•
Granted: 1993-11-16
•
Expires: 2011-10-30
Abstract
Abstract A digital camera signal processing device includes an analog-to-digital converting circuit for performing analog-to-digital conversion of a signal supplied from an image sensor, a color-signal separating circuit for separating color signals corresponding to sampling points for respective colors from an output signal from the analog-to-digital converting circuit, and a color-signal interpolating circuit for interpolating color signals for sampling points where no color signals are present, on the basis of the color signals corresponding to the sampling points for the respective colors.
Inventors
- 👤 Toshihiko Mimura
- 👤 Eiji Ohara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:41
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/80; H04N23/84; H04N23/843; H04N25/00; H04N25/10; H04N25/11; H04N25/13; H04N25/133; H04N2209/00; H04N2209/04; H04N2209/041; H04N2209/042; H04N2209/045; H04N2209/046
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
108 words
A digital camera signal processing device comprising: (a) analog-to-digital converting means for performing analog-to-digital conversion of a signal supplied from an image sensor having a predetermined color filter arrangement; (b) color-signal separating means for separating color signals corresponding to sampling points for respective colors from an output signal from said analog-to-digital converting means; and (c) color-signal interpolating means for interpolating color signals for points where color signals are not separated from said output signal, on the basis of the color signals corresponding to the sampling points for the respective colors, the interpolating action of said interpolating means being variably set according to the arrangement of said color filter.
Claim 2
Dependent Claim
108 words
A digital camera signal processing device comprising: (a) analog-to-digital converting means for performing analog-to-digital conversion of a signal supplied from an image sensor having a predetermined color filter arrangement; (b) color-signal separating means for separating color signals corresponding to sampling points for respective colors from an output signal from said analog-to-digital converting means; and (c) color-signal interpolating means for interpolating color signals for points where color signals are not separated from said output signal, on the basis of the color signals corresponding to the sampling points for the respective colors, the interpolating action of said interpolating means being variably set according to the arrangement of said color filter.
Claim 3
Dependent Claim
20 words
A digital camera signal processing device according to claim 1, wherein said color-signal interpolating means is a programmable two-dimensional filter.
Claim 4
Dependent Claim
22 words
A digital camera signal processing device according to claim 1, wherein said color-signal interpolating means is a combination of programmable one-dimensional filters.
Claim 5
Dependent Claim
43 words
A digital camera signal processing device according to claim 1, 2 or 3, further comprising a memory into which the output signal from said analog-to-digital converting means is written and from which a signal is read and supplied to said color-signal separating means.
Claim 6
Dependent Claim
84 words
A signal processing device comprising: (a) signal supplying means for supplying signals of different colors sequentially in a time-division manner; (b) interpolating means for performing interpolation processing of a portion of the supplied signals in which none of the different colors are present, on the basis of the supplies signals of the different colors; and (c) setting means for variably setting the interpolation processing performed by said interpolating means, in accordance with the manner of supply of the signals from said signal supplying means.
Claim 7
Dependent Claim
84 words
A signal processing device comprising: (a) signal supplying means for supplying signals of different colors sequentially in a time-division manner; (b) interpolating means for performing interpolation processing of a portion of the supplied signals in which none of the different colors are present, on the basis of the supplies signals of the different colors; and (c) setting means for variably setting the interpolation processing performed by said interpolating means, in accordance with the manner of supply of the signals from said signal supplying means.
Claim 8
Dependent Claim
22 words
A signal processing device according to claim 5, wherein said signal supplying means includes image sensing means having a predetermined color filter.
Claim 9
Dependent Claim
17 words
A signal processing device according to claim 6, wherein the image sensing means includes a charge-coupled device.
Claim 10
Dependent Claim
22 words
A signal processing device according to claim 5, wherein said interpolating means includes a matrix computation circuit corresponding to the different colors
Claim 11
Dependent Claim
19 words
A signal processing device according to claim 5, wherein said interpolating means is a combination of programmable one-dimensional filters.
References Cited (Backward Citations)
US4599640A
Cited
US4642678A
Cited
US4734759A
Cited
US5034805A
Cited
US5008739A
Cited
US5053861A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-11-15 | 1997-05-17 | 1997-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-15 | 2001-05-17 | 2001-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-15 | 2005-05-17 | 2005-11-16 | $7700.00 | Window Closed / Lapsed |