US4982277A
Expired / Lapsed
US
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Color image processing apparatus
Assignee: Canon Inc
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Filing: 1989-11-14
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Granted: 1991-01-01
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Expires: 2009-11-14
Abstract
Abstract There is disclosed 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
2026-10-27 04:50
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/6072; H04N1/58
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
59 words
An image processing apparatus comprising: (a) color conversion means for converting a color of a given image data to a desired color; (b) feature detection means for detecting a feature of the image data converted by said color conversion means; and (c) correction means for correcting the image data in response to an output from said feature detection means.
Claim 2
Dependent Claim
59 words
An image processing apparatus comprising: (a) color conversion means for converting a color of a given image data to a desired color; (b) feature detection means for detecting a feature of the image data converted by said color conversion means; and (c) correction means for correcting the image data in response to an output from said feature detection means.
Claim 3
Dependent Claim
21 words
An image processing apparatus according to claim 1, wherein said color conversion means includes comparison means for comparing the image data.
Claim 4
Dependent Claim
22 words
An image processing apparatus according to claim 1, wherein said feature detection means detects data of predetermined hue in the image data.
Claim 5
Dependent Claim
26 words
An image processing apparatus according to claim 1, wherein said feature detection means detects a black character portion of an image represented by the image data.
Claim 6
Dependent Claim
38 words
An image processing apparatus according to claim 2, wherein said correction means includes control means for controlling an output of chromatic color component of the image data for the black character portion detected by said feature detection means.
Claim 7
Dependent Claim
103 words
An image processing apparatus comprising: (a) color conversion means for converting a color of a given image data to a desired color, wherein said color conversion means includes detection means for detecting a specific color of the given image data and replacement means for replacing the given image data with image data representing a desired color in response to a detecting result of said detection means; (b) feature detection means for detecting a feature of the image data converted by said color conversion means; and (c) correction means for correcting the image data in response to an output from said feature detection means.
Claim 8
Dependent Claim
103 words
An image processing apparatus comprising: (a) color conversion means for converting a color of a given image data to a desired color, wherein said color conversion means includes detection means for detecting a specific color of the given image data and replacement means for replacing the given image data with image data representing a desired color in response to a detecting result of said detection means; (b) feature detection means for detecting a feature of the image data converted by said color conversion means; and (c) correction means for correcting the image data in response to an output from said feature detection means.
Claim 9
Dependent Claim
15 words
An image processing apparatus according to claim 6, wherein said replacement means includes a selector.
Claim 10
Dependent Claim
106 words
An image processing apparatus according to claim 6, (a) color conversion means for converting a color of a given image data to a desired color, wherein said color conversion means includes detection means for detecting a specific color of the given image data and replacement means for replacing the given image data with image data representing a desired color in response to a detecting result of said detection means. (b) feature detection means for detecting a feature of the image data converted by said color conversion means; and (c) correction means for correcting the image data in response to an output from said feature detection means.
Claim 11
Dependent Claim
26 words
An image processing apparatus according to claim 6, wherein said feature detection means detects a black character portion of an image represented by the image data.
Claim 12
Dependent Claim
38 words
An image processing apparatus according to claim 9, wherein said correction means includes control means for controlling an output of chromatic color component of the image data for the black character portion detected by said feature detection means.
Claim 13
Dependent Claim
59 words
An image processing apparatus comprising: (a) color conversion means for converting a color of a given image data to a desired color; (b) log conversion means for logarithmically converting the image data converted by said color conversion means; and (c) detection means for detecting a feature portion of image in the image data converted by said log conversion means.
Claim 14
Dependent Claim
59 words
An image processing apparatus comprising: (a) color conversion means for converting a color of a given image data to a desired color; (b) log conversion means for logarithmically converting the image data converted by said color conversion means; and (c) detection means for detecting a feature portion of image in the image data converted by said log conversion means.
Claim 15
Dependent Claim
16 words
An image processing apparatus according to claim 11, wherein said correction means is color correction means.
Claim 16
Dependent Claim
25 words
An image processing apparatus according to claim 11, wherein said detection means detects black portion of the image data converted by said log conversion means.
Claim 17
Dependent Claim
26 words
An image processing apparatus according to claim 11, wherein said feature detection means detects a black character portion of an image represented by the image data.
Claim 18
Dependent Claim
22 words
An image processing apparatus according to claim 11, wherein said character color conversion means includes comparison means for comparing the image data.
Claim 19
Dependent Claim
22 words
An image processing apparatus according to claim 11, wherein said feature detection means detects data of predetermined hue in the image data.
Claim 20
Dependent Claim
27 words
An image processing apparatus according to claim 11, further comprising correction means for correcting said image data in response to a detecting result of said detection means.
Claim 21
Dependent Claim
25 words
An image processing apparatus according to claim 17, wherein said detection means detects black portion of the image data converted by said log conversion means.
Claim 22
Dependent Claim
38 words
An image processing apparatus according to claim 18, wherein said correction means includes control means for controlling an output of chromatic color component of the image data for the black character portion detected by said feature detection means.
References Cited (Backward Citations)
US4538182A
Cited
US4724477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-31 | 1994-07-02 | 1995-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-31 | 1998-07-02 | 1999-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-31 | 2002-07-02 | 2003-01-01 | $7700.00 | Window Closed / Lapsed |