Patent US5475508A successfully refreshed from Google Patents.
US5475508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state color imager with on-chip color balance
Assignee: Canon Inc
•
Filing: 1994-08-15
•
Granted: 1995-12-12
•
Expires: 2014-08-15
Abstract
Abstract A color image reading apparatus includes a plurality of line sensors which have different color filters and each of which has a plurality of light receiving elements. One of the plurality of line sensors has an opening width larger than those of the remaining line sensors. The apparatus also includes a correcting unit such as an edge emphasis circuit for correcting image signals output from the line sensors so as to obtain identical resolutions of the image signals, and a processing unit such as a masking circuit for performing color processing of the image signals corrected by the correcting unit.
Inventors
- 👤 Katsuyoshi Maeshima
- 👤 Atsushi Takeda
- 👤 Shinobu Arimoto
- 👤 Shizuo Hasegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:25
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/48; H04N1/486; H04N1/56; H04N1/58; H04N23/00; H04N23/80; H04N23/84; H04N25/00; H04N25/10; H04N25/11; H04N25/13; H04N25/134; H04N25/60; H04N25/63; H04N25/633; H04N25/70; H04N25/701; H04N2209/00; H04N2209/04; H04N2209/041; H04N2209/042; H04N2209/045; H04N2209/046
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
144 words
A color image reading apparatus, comprising: a plurality of line sensors for reading an original image line by line, said plurality of line sensors reading different color components of the original image, respectively, moving means for moving a read position of said plurality of line sensors on the original image; driving means for driving a predetermined one of said plurality of line sensors having a first storage time and driving another of said plurality of line sensors having a second storage time, the first storage time being longer than the second storage time; and correction means for equalizing resolutions of image signals representing the different color components by performing an interpolating process on image signals of at least two adjacent lines output from the driven line sensor having the first storage time to generate image signals of a line between the two adjacent lines.
Claim 2
Dependent Claim
144 words
A color image reading apparatus, comprising: a plurality of line sensors for reading an original image line by line, said plurality of line sensors reading different color components of the original image, respectively, moving means for moving a read position of said plurality of line sensors on the original image; driving means for driving a predetermined one of said plurality of line sensors having a first storage time and driving another of said plurality of line sensors having a second storage time, the first storage time being longer than the second storage time; and correction means for equalizing resolutions of image signals representing the different color components by performing an interpolating process on image signals of at least two adjacent lines output from the driven line sensor having the first storage time to generate image signals of a line between the two adjacent lines.
Claim 3
Dependent Claim
30 words
An apparatus according to claim 1, wherein said driving means drives a line sensor having the lowest sensitivity level among the plurality of line sensors having the first storage time.
Claim 4
Dependent Claim
26 words
An apparatus according to claim 1, further comprising processing means for performing color processing of the image signals whose resolutions are equalized by said correction means.
Claim 5
Dependent Claim
50 words
An apparatus according to claim 1, wherein each of said plurality of line sensors has a plurality of light receiving elements and said moving means moves the read position of said plurality of line sensors in a direction perpendicular to an alignment direction of the plurality of light receiving elements.
Claim 6
Dependent Claim
20 words
An apparatus according to claim 1, wherein the first storage time is an integer multiple of the second storage time.
Claim 7
Dependent Claim
26 words
An apparatus according to claim 1, wherein said plurality of line sensors are provided with a red filter, a green filter and a blue filter, respectively.
Claim 8
Dependent Claim
42 words
An apparatus according to claim 6, wherein said driving means drives a line sensor provided with the blue filter having the first storage time and drives line sensors which are provided with the read and green filters having the second storage time.
Claim 9
Dependent Claim
20 words
An apparatus according to claim 1, wherein one of said plurality of line sensors is provided with a red filter.
Claim 10
Dependent Claim
34 words
An apparatus according to claim 8, wherein said driving means drives a line sensor provided with the red filter having the first storage time and drives another line sensor having the second storage time.
Claim 11
Dependent Claim
137 words
A color image reading method, comprising the steps of: reading an original image line by line by a plurality of line sensors, said plurality of line sensors reading different color components of the original image, respectively; moving a read position of said plurality of line sensors on the original image; driving a predetermined one of said plurality of line sensors having a first storage time and driving another of said plurality of line sensors having a second storage time, the first storage time being longer than the second storage time; and equalizing resolutions of image signals representing the different color components by performing an interpolating process on image signals of at least two adjacent lines output from the driven sensor having the first storage time to generate image signals of a line between the two adjacent lines.
Claim 12
Dependent Claim
137 words
A color image reading method, comprising the steps of: reading an original image line by line by a plurality of line sensors, said plurality of line sensors reading different color components of the original image, respectively; moving a read position of said plurality of line sensors on the original image; driving a predetermined one of said plurality of line sensors having a first storage time and driving another of said plurality of line sensors having a second storage time, the first storage time being longer than the second storage time; and equalizing resolutions of image signals representing the different color components by performing an interpolating process on image signals of at least two adjacent lines output from the driven sensor having the first storage time to generate image signals of a line between the two adjacent lines.
Claim 13
Dependent Claim
33 words
The method according to claim 10, wherein in said driving step a line sensor is driven which has the lowest sensitivity level among the plurality of line sensors having the first storage time.
Claim 14
Dependent Claim
26 words
The method according to claim 10, including the step of: performing a color processing of the image signals whose resolutions are equalized by said equalizing step.
Claim 15
Dependent Claim
52 words
The method according to claim 10, wherein each of said plurality of line sensors has a plurality of light receiving elements, and in said reading step the read position of said plurality of line sensors is moved in a direction perpendicular to an alignment direction of the plurality of light receiving elements.
Claim 16
Dependent Claim
20 words
The method according to claim 10, wherein the first storage time is an integer multiple of the second storage time.
Claim 17
Dependent Claim
26 words
The method according to claim 10, wherein said plurality of line sensors are provided with a red filter, a green filter and a blue filter, respectively.
Claim 18
Dependent Claim
43 words
The method according to claim 15, wherein in said driving step a line sensor provided with the blue filter having the first storage time and line sensors which are provided with the red and green filters having the second storage time are driven.
Claim 19
Dependent Claim
20 words
The method according to claim 10, wherein one of said plurality of line sensors is provided with a red filter.
Claim 20
Dependent Claim
35 words
The method according to claim 17, wherein in said driving step a line sensor provided with the red filter having the first storage time and another line sensor having the second storage time are driven.
References Cited (Backward Citations)
US4891690A
Cited
US4809061A
Cited
US4712141A
Cited
US4734759A
Cited
US5438364A
Cited
US4974072A
Cited
US4953014A
Cited
US5321529A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-12-11 | 1999-06-12 | 1999-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-11 | 2003-06-12 | 2003-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-11 | 2007-06-12 | 2007-12-12 | $7700.00 | Window Closed / Lapsed |