US5267031A
Expired / Lapsed
US
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Color image processing apparatus
Assignee: Canon Inc
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Filing: 1990-09-19
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Granted: 1993-11-30
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Expires: 2010-09-19
Abstract
Abstract There is provided a color image processing apparatus comprising color conversion circuit for converting image data to a desired color, feature extraction circuit for extracting a feature of the image data and image correction circuit for correcting the image data on the basis of the feature extraction circuit, characterized in that a color conversion processing is executed prior to extraction of feature from the image data.
Inventors
- 👤 Koichi Katoh
- 👤 Yoshinori Ikeda
- 👤 Mitsuru Kurita
- 👤 Hiroyuki Ichikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:11
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/58
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
90 words
A color image processing apparatus comprising: inputting means for inputting a color image signal; conversion means for converting said color image signal inputted by said inputting means to a color image signal defined by standard color space; color conversion means for performing predetermined color conversion on said color image signal defined by standard color space converted by said conversion means; and color correction means for performing a color correction to output the color image signal defined by standard color space converted by said color conversion means to an output device.
Claim 2
Dependent Claim
90 words
A color image processing apparatus comprising: inputting means for inputting a color image signal; conversion means for converting said color image signal inputted by said inputting means to a color image signal defined by standard color space; color conversion means for performing predetermined color conversion on said color image signal defined by standard color space converted by said conversion means; and color correction means for performing a color correction to output the color image signal defined by standard color space converted by said color conversion means to an output device.
Claim 3
Dependent Claim
24 words
A color image processing apparatus according to claim 1, wherein said color image signal defined by standard color space is an NTSC standard signal.
Claim 4
Dependent Claim
17 words
A color image processing apparatus according to claim 1, wherein said inputting means comprises a color sensor.
Claim 5
Dependent Claim
66 words
A color image processing apparatus according to claim 1, wherein said color conversion means comprises: extracting means for extracting a signal corresponding to a predetermined color from said color image signal defined by standard color space; and replacing means for replacing said signal corresponding to said predetermined color extracted by extracting means with a signal corresponding to another color that is different from said predetermined color.
Claim 6
Dependent Claim
35 words
A color image processing apparatus according to claim 1, wherein said color correction means corrects said color image signal defined by standard color space to a four color signal of yellow, magenta, cyan and black.
Claim 7
Dependent Claim
26 words
A color image processing apparatus according to claim 5, further comprising means for outputting a signal corrected by said color correction means to a color printer.
Claim 8
Dependent Claim
79 words
A color image processing method comprising the steps of: inputting a color image signal; converting the color image signal inputted in the inputting step to a color image signal defined by standard color space; performing predetermined color conversion on the color image signal defined by standard color space converted in the conversion step; and performing a color correction to output the color image signal defined by standard color space converted in the color conversion step to a output device.
Claim 9
Dependent Claim
79 words
A color image processing method comprising the steps of: inputting a color image signal; converting the color image signal inputted in the inputting step to a color image signal defined by standard color space; performing predetermined color conversion on the color image signal defined by standard color space converted in the conversion step; and performing a color correction to output the color image signal defined by standard color space converted in the color conversion step to a output device.
Claim 10
Dependent Claim
24 words
A color image processing method according to claim 7, wherein the color image signal defined by standard color space is an NTSC standard signal.
Claim 11
Dependent Claim
19 words
A color image processing method according to claim 7, wherein the inputting step is performed by a color sensor.
Claim 12
Dependent Claim
64 words
A color image processing method according to claim 7, wherein the color conversion step comprises the steps of: extracting a signal corresponding to a predetermined color form the color image signal defined by standard color space; and replacing the signal corresponding to the predetermined color extracted in the extracting step with a signal corresponding to another color that is different from the predetermined color.
Claim 13
Dependent Claim
35 words
A color image processing method according to claim 7, wherein the color correction step corrects the color image signal defined by standard color space to a four color signal of yellow, magenta, cyan and black.
Claim 14
Dependent Claim
27 words
A color image processing method according to claim 11, further comprising the step of outputting a signal corrected in the color correction step to a color printer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-11-29 | 1997-05-31 | 1997-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-29 | 2001-05-31 | 2001-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-29 | 2005-05-31 | 2005-11-30 | $7700.00 | Window Closed / Lapsed |