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US5835243A
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Image processing apparatus and method
Assignee: Canon Inc
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Filing: 1997-06-13
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Granted: 1998-11-10
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Expires: 2017-06-13
Abstract
Abstract A pattern generator generates a color chart which is processed by an image processor and reproduced on a medium by an output device without color correction. Since no color correction is made to the color chart on the medium, the image processing characteristics of the image processor and the output device are reflected in color chart on the medium. The color chart on the medium is read by a reader and converted to color chart read data which is converted to color correction parameters for the output device by a color correction parameter generator. The color correction parameters are stored in a first storage device, and device setting values indicative of characteristics of the output device are stored in a second storage device. When another color image is read by the reader or input by another input device, a color corrector color corrects the color image based on the color correction parameters stored in the first storage device, with the color corrected image then being processed by the image processor, the operational characteristics of which are adjusted in accordance with an operator selected setting value stored in the second storage device. The color corrected and processed image is the output by the output device.
Inventors
- 👤 Hiroshi Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:46
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/603; H04N1/6033
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
118 words
An image processing apparatus comprising: a memory for storing a plurality of color correction factors in accordance with a plurality of conversion methods; setting means for setting one of the conversion methods; color correction means for performing color correction based on a color correction factor which is stored is said memory in accordance with the set conversion method; conversion means for converting digital image data of M-levels, on which the color correction is performed based on the set conversion method, into digital image data of N-levels, (M>N); and generation means for generating a color correction factor based on an output color chart corresponding to said set conversion method, and storing the generated color correction factor in said memory.
Claim 2
Dependent Claim
118 words
An image processing apparatus comprising: a memory for storing a plurality of color correction factors in accordance with a plurality of conversion methods; setting means for setting one of the conversion methods; color correction means for performing color correction based on a color correction factor which is stored is said memory in accordance with the set conversion method; conversion means for converting digital image data of M-levels, on which the color correction is performed based on the set conversion method, into digital image data of N-levels, (M>N); and generation means for generating a color correction factor based on an output color chart corresponding to said set conversion method, and storing the generated color correction factor in said memory.
Claim 3
Dependent Claim
28 words
An image processing apparatus according to claim 1, further comprising gradation correction means for performing gradation correction to the image data on which the color correction is performed.
Claim 4
Dependent Claim
28 words
An image processing apparatus according to claim 2, wherein said setting means sets said conversion method and a condition of said gradation correction based on a manual instruction.
Claim 5
Dependent Claim
17 words
An image processing apparatus according to claim 1, wherein said color correction means performs a matrix computation.
Claim 6
Dependent Claim
14 words
An image processing apparatus according to claim 1, wherein said conversion means performs binarization.
Claim 7
Dependent Claim
16 words
An image processing apparatus according to claim 5, wherein said conversion methods comprise a dither pattern.
Claim 8
Dependent Claim
17 words
An image processing apparatus according to claim 5, wherein said conversion methods comprise an error diffusion method.
Claim 9
Dependent Claim
26 words
An image processing apparatus according to claim 1, wherein the color correction factors are generated in accordance with an output characteristic of an image output means.
Claim 10
Dependent Claim
21 words
An image processing apparatus according to claim 1, wherein said setting means sets said conversion method based on a manual instruction.
Claim 11
Dependent Claim
24 words
An image processing apparatus to claim 1, further comprising forming means for forming a color image according to said digital image data of N-levels.
Claim 12
Dependent Claim
120 words
An image processing method comprising: a memory step of storing a plurality of color correction factors in accordance with a plurality of conversion methods; a setting step of setting one of the conversion methods; a color correction step of performing color correction based on a color correction factor which is stored in said memory step in accordance with the set conversion method; a conversion step of converting image data of M-levels, on which the color correction is performed based on the set conversion method, into digital image data of N-levels (M>N); and a generation step of generating a color correction factor based on an output color chart corresponding to said set conversion method, and storing the generated color correction factor.
Claim 13
Dependent Claim
120 words
An image processing method comprising: a memory step of storing a plurality of color correction factors in accordance with a plurality of conversion methods; a setting step of setting one of the conversion methods; a color correction step of performing color correction based on a color correction factor which is stored in said memory step in accordance with the set conversion method; a conversion step of converting image data of M-levels, on which the color correction is performed based on the set conversion method, into digital image data of N-levels (M>N); and a generation step of generating a color correction factor based on an output color chart corresponding to said set conversion method, and storing the generated color correction factor.
Claim 14
Dependent Claim
135 words
An image processing method of performing a color process based on a manual instruction, comprising: a memory step of storing a plurality of color correction factors corresponding to a plurality of color processes; an instruction step of instructing a desired color process manually; a color correction step of performing color correction in accordance with an output characteristic of an image output device based on a color correction factor corresponding to the desired color process; a color conversion step of performing the desired color process to the image data on which the color correction is performed; and a generating step of generating the color correction factor based on an output color chart corresponding to a color process, and storing the generated color correction factor in said memory step so as to correspond to the color process.
Claim 15
Dependent Claim
135 words
An image processing method of performing a color process based on a manual instruction, comprising: a memory step of storing a plurality of color correction factors corresponding to a plurality of color processes; an instruction step of instructing a desired color process manually; a color correction step of performing color correction in accordance with an output characteristic of an image output device based on a color correction factor corresponding to the desired color process; a color conversion step of performing the desired color process to the image data on which the color correction is performed; and a generating step of generating the color correction factor based on an output color chart corresponding to a color process, and storing the generated color correction factor in said memory step so as to correspond to the color process.
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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) | 2001-11-09 | 2002-05-11 | 2002-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-09 | 2006-05-11 | 2006-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-09 | 2010-05-11 | 2010-11-10 | $7700.00 | Window Closed / Lapsed |