US4891690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color image reading apparatus with plural linear sensors which can read different lines of the image
Assignee: Canon Inc
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Filing: 1988-05-11
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Granted: 1990-01-02
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Expires: 2008-05-11
Abstract
Abstract A color image reading apparatus includes a plurality of linear sensors, each capable of generating plural analog color component signals. The sensors are arranged to read a line of the color image in a divided manner and such that adjacent ones of the linear sensors read mutually different lines of the color image. Also provided is a separator for separating the plural analog color component signals generated by the sensors into analog color component signals of each color, and a converter for converting the analog color component signals of each color into digital color component signals of each color, respectively. The apparatus further includes a device for forming plural continuous digital color component signals representing a line of the color image from the digital color component signals of each color converted by the converter. In addition, a processor is provided for digital color processing of the plural continuous digital color component signals to form digital color image signals usable for reproduction of the color image.
Inventors
- 👤 Shizuo Hasegawa
- 👤 Nobuo Matsuoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:10
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/19; H04N1/195; H04N1/19505; H04N1/19515; H04N1/46; H04N1/48; H04N1/486; H04N1/56; H04N1/60; H04N1/6072
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
173 words
A color image reading apparatus comprising: reading means for reading a color image, wherein said reading means includes plural linear sensors each capable of generating plural analog color component signals arranged such that said plural linear sensors read a line of the color image in a divided manner and such that adjacent linear sensors read mutually different lines of the color image; separating means for separating the plural analog color component signals generated by said plural linear sensors into analog color component signals of each color; conversion means for converting the analog color component signals of each color separated by said separating means into digital color component signals of each color, respectively; forming means for forming plural continuous digital color component signals representing a line of the color image from the digital color component signals of each color converted by said conversion means; and digital color processing means for digital color processing of the plural continuous digital color component signals to form digital color image signals usable for reproduction of the color image.
Claim 2
Dependent Claim
173 words
A color image reading apparatus comprising: reading means for reading a color image, wherein said reading means includes plural linear sensors each capable of generating plural analog color component signals arranged such that said plural linear sensors read a line of the color image in a divided manner and such that adjacent linear sensors read mutually different lines of the color image; separating means for separating the plural analog color component signals generated by said plural linear sensors into analog color component signals of each color; conversion means for converting the analog color component signals of each color separated by said separating means into digital color component signals of each color, respectively; forming means for forming plural continuous digital color component signals representing a line of the color image from the digital color component signals of each color converted by said conversion means; and digital color processing means for digital color processing of the plural continuous digital color component signals to form digital color image signals usable for reproduction of the color image.
Claim 3
Dependent Claim
34 words
A color image reading apparatus according to claim 1, wherein said reading means comprises means for illuminating the color image and filter means for separating light reflected from the color image into color components.
Claim 4
Dependent Claim
29 words
A color image reading apparatus according to claim 1, further cmprising means for reproducing the color image from the digital color image signals formed by said color processing means.
Claim 5
Dependent Claim
176 words
A color image reading apparatus comprising: reading means for reading a color image, wherein said reading means includes plural linear sensors each capable of generating plural analog color component signals arranged such that said plural linear sensors read a line of the color image in a divided manner and such that adjacent linear sensors read mutually different lines of the color image; plural analog processing means, each being capable of analog color processing of the plural analog color component signals generated by an associated one of said plural linear sensors; conversion means for converting the plural analog color component signals respectively processed by corresponding one of said plural analog processing means into plural digital color component signals; forming means for forming plural continuous digital color component signals representing a line of the color image from the plural digital color component signals converted by said conversion means; and digital color processing means for digital color processing of the plural continuous digital color component signals to form digital color image signals usable for reproduction of the color image.
Claim 6
Dependent Claim
176 words
A color image reading apparatus comprising: reading means for reading a color image, wherein said reading means includes plural linear sensors each capable of generating plural analog color component signals arranged such that said plural linear sensors read a line of the color image in a divided manner and such that adjacent linear sensors read mutually different lines of the color image; plural analog processing means, each being capable of analog color processing of the plural analog color component signals generated by an associated one of said plural linear sensors; conversion means for converting the plural analog color component signals respectively processed by corresponding one of said plural analog processing means into plural digital color component signals; forming means for forming plural continuous digital color component signals representing a line of the color image from the plural digital color component signals converted by said conversion means; and digital color processing means for digital color processing of the plural continuous digital color component signals to form digital color image signals usable for reproduction of the color image.
Claim 7
Dependent Claim
34 words
A color image reading apparatus according to claim 4, wherein said reading means comprises means for illuminating the color image and filter means for separating light reflected from the color image into color components.
Claim 8
Dependent Claim
31 words
A color image reading apparatus according to claim 4, wherein said plural analog processing means are each adapted to separate plural analog color component signals generated by said plural linear sensors.
Claim 9
Dependent Claim
24 words
A color image reading apparatus according to claim 4, further comprising means for reproducing the color image based on the digital color image signals.
Claim 10
Dependent Claim
187 words
A color image reading apparatus, comprising: reading means for reading a color image, wherein said reading means includes plural linear sensors each capable of generating plural analog color component signals arranged such that said plural linear sensors read a line of the color image in a divided manner and such that adjacent linear sensors read mutually different lines of the color image; means for providing relative motion between said plural linear sensors and the color image in a sub-scanning direction perpendicular to a main-scanning direction of said plural linear sensors; separating means for separating the plural color component signals generated by said plural linear sensors into color component signals of each color; plural forming means for correcting a discrepancy between the color component signals of each color separated by said separating means due to the reading of mutually different lines of the color image by adjacent linear sensors, and for forming continuous color component signals representing a line of the color image; and color processing means for color processing of the continuous color component signals to form color image signals usable for reproduction of the color image.
Claim 11
Dependent Claim
187 words
A color image reading apparatus, comprising: reading means for reading a color image, wherein said reading means includes plural linear sensors each capable of generating plural analog color component signals arranged such that said plural linear sensors read a line of the color image in a divided manner and such that adjacent linear sensors read mutually different lines of the color image; means for providing relative motion between said plural linear sensors and the color image in a sub-scanning direction perpendicular to a main-scanning direction of said plural linear sensors; separating means for separating the plural color component signals generated by said plural linear sensors into color component signals of each color; plural forming means for correcting a discrepancy between the color component signals of each color separated by said separating means due to the reading of mutually different lines of the color image by adjacent linear sensors, and for forming continuous color component signals representing a line of the color image; and color processing means for color processing of the continuous color component signals to form color image signals usable for reproduction of the color image.
Claim 12
Dependent Claim
34 words
A color image reading apparatus according to claim 8, wherein said reading means comprises means for illuminating the color image and filter means for separating light reflected from the color image into color components.
Claim 13
Dependent Claim
35 words
A color image reading apparatus according to claim 8, further comprising means for controlling the operation of said plural forming means in accordance with a magnification at which said reading means reads the color image.
Claim 14
Dependent Claim
66 words
A color image reading apparatus according to claim 8, wherein said plural forming means has means for delaying the color component signals of each color separated by said separating means and generated by at least one of said plural linear sensors which reads one line of the color image prior to reading of the one line by at least another one of said plural linear sensors.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-01-01 | 1993-07-03 | 1994-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-01 | 1997-07-03 | 1998-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-01 | 2001-07-03 | 2002-01-02 | $7700.00 | Window Closed / Lapsed |