Patent US4719490A successfully refreshed from Google Patents.
US4719490A
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Color image processing apparatus
Assignee: Canon Inc
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Filing: 1987-06-01
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Granted: 1988-01-12
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Expires: 2007-06-01
Abstract
Abstract A color image processing apparatus comprising an input unit which receives a plurality of color component signals in parallel. A color correction device receives the plurality of color component signals and a signals representing the kind of a corrected color signal and outputs a selected kind of corrected color signal in order to sequentially obtain different corrected color signals for respective colors from the plurality of color component signals. A color image forming device forms respective color images sequentially using the corrected color signals output from the color correction device.
Inventors
- 👤 Tadashi Yoshida
- 👤 Naoto Kawamura
- 👤 Tohru Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:48
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
145 words
A color image processing apparatus comprising: input means for receiving a plurality of color component signals in parallel; color correction means for receiving said plurality of color component signals and a signal representing the kind of a corrected color signal and for outputting a selected kind of corrected color signal to sequentially obtain different corrected color signals for respective colors from said plurality of color component signals, said color correction means including a plurality of multiplication means for multiplying the respective color component signals by correction factors, adder means for adding the results of the multiplication by said plurality of multiplication means and selection means for selecting said correction factors in accordance with said signal representing the kind of the corrected color signal; and color image forming means for forming respective color images sequentially using the corrected color signals output from said color correction means.
Claim 2
Dependent Claim
145 words
A color image processing apparatus comprising: input means for receiving a plurality of color component signals in parallel; color correction means for receiving said plurality of color component signals and a signal representing the kind of a corrected color signal and for outputting a selected kind of corrected color signal to sequentially obtain different corrected color signals for respective colors from said plurality of color component signals, said color correction means including a plurality of multiplication means for multiplying the respective color component signals by correction factors, adder means for adding the results of the multiplication by said plurality of multiplication means and selection means for selecting said correction factors in accordance with said signal representing the kind of the corrected color signal; and color image forming means for forming respective color images sequentially using the corrected color signals output from said color correction means.
Claim 3
Dependent Claim
52 words
A color image processing apparatus according to claim 1, wherein said multiplication means and said selection means include a memory for storing the results of the multiplication in advance at an address represented by the values of said color component signals and said signal representing the kind of the corrected color signal.
Claim 4
Dependent Claim
35 words
A color image processing apparatus according to claim 1, wherein said image forming means forms different-colored images sequentially on an image carrier and transfers different-colored images sequentially from said image carrier to a recording material.
Claim 5
Dependent Claim
17 words
A color image processing apparatus according to claim 3, wherein said image carrier includes a photosensitive drum.
Claim 6
Dependent Claim
123 words
A color image forming apparatus for correcting color separated input image signals for respective colors and for sequentially superimposing respective color images formed by the corrected color image signals, thereby forming a composite color image, said apparatus including selection means for selection correction factors, multiplication means for multiplying said color separated input image signals by said correction factors selected by said selection means, adder means for adding the results of multiplication of the outputs of said multiplication means, color pixel forming means for forming respective color pixels in accordance with the outputs of said adder means, wherein said selection means selects the correction factors in accordance with a selection signal to select a color in which said color pixel forming means forms pixels.
Claim 7
Dependent Claim
123 words
A color image forming apparatus for correcting color separated input image signals for respective colors and for sequentially superimposing respective color images formed by the corrected color image signals, thereby forming a composite color image, said apparatus including selection means for selection correction factors, multiplication means for multiplying said color separated input image signals by said correction factors selected by said selection means, adder means for adding the results of multiplication of the outputs of said multiplication means, color pixel forming means for forming respective color pixels in accordance with the outputs of said adder means, wherein said selection means selects the correction factors in accordance with a selection signal to select a color in which said color pixel forming means forms pixels.
Claim 8
Dependent Claim
45 words
A color image forming apparatus according to claim 5, wherein said multiplication means includes memory means storing the results of the multiplication of said input image signal by the selected correction factors at an address represented by said input image signal and said selection signal.
Claim 9
Dependent Claim
48 words
A color image forming apparatus according to claim 5, wherein said color pixel forming means includes means for forming an electrostatic potential image on an image carrier, means for developing said potential image with different color developers, and means for transferring the developed image onto a recording material.
Claim 10
Dependent Claim
73 words
A color image processing apparatus comprising: input means for receiving a plurality of color component signals in parallel; selection means for selecting correction factors for masking; multiplication means for multiplying said color component signals by the correction factors selected by said selection means; and adder means for adding the outputs of said multiplying means; wherein said selection means changes said correction factors in accordance with a selection signal to select an output color.
Claim 11
Dependent Claim
73 words
A color image processing apparatus comprising: input means for receiving a plurality of color component signals in parallel; selection means for selecting correction factors for masking; multiplication means for multiplying said color component signals by the correction factors selected by said selection means; and adder means for adding the outputs of said multiplying means; wherein said selection means changes said correction factors in accordance with a selection signal to select an output color.
Claim 12
Dependent Claim
45 words
A color image processing apparatus according to claim 8, wherein said multiplication means includes memory means storing the results of the multiplication of said input image signal by the selected correction factors at an address represented by said input image signal and said selection signal.
Claim 13
Dependent Claim
31 words
A color image processing apparatus according to claim 8, further including means for sequentially forming color images for respective colors in accordance with the color signals output from said adder means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-11 | 1991-07-13 | 1992-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-11 | 1995-07-13 | 1996-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-11 | 1999-07-13 | 2000-01-12 | $7700.00 | Window Closed / Lapsed |