US5504592A
Expired / Lapsed
US
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Color expressing method, color image reading apparatus and color image processing apparatus
Assignee: Canon Inc
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Filing: 1995-02-21
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Granted: 1996-04-02
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Expires: 2015-02-21
Abstract
Abstract A color image reading system in which an input color image signal is converted into color data signals. The color data signals are indicative of a combination of data of reference stimuli represented by verticles of a triangle of which one side circumscribe a pure purple locus, and of which the remaining two sides circumscribers two points of a spectral locus of a color degree diagram, the two points representing substantially middle colors between a color represented by one vertex of the triangle at which the remaining two sides intersect and each of two colors represented by the remaining two sides of the triangle, respectively. The input color image signal is reproduced on a color image output device in response to the provision of the color data signals.
Inventors
- 👤 Akihiro Usami
- 👤 Takashi Kawai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:00
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/603
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
128 words
A color processing apparatus comprising: receiving means for receiving a color image signal; image processing means for performing predetermined image processing of the received color image signal; and output means for outputting a processed color image signal, wherein said received color image signal and said output color image signal in a combination of data of reference stimuli represented by vertices of a triangle of which one side circumscribes a pure purple locus and of which remaining two side circumscribes two points of a spectral locus of a color degree diagram, the two points representing substantially middle colors between a color represented by one vertex of the triangle at which the remaining two sides intersect and each of two colors represented by remaining two verticles of the triangle, respectively.
Claim 2
Dependent Claim
128 words
A color processing apparatus comprising: receiving means for receiving a color image signal; image processing means for performing predetermined image processing of the received color image signal; and output means for outputting a processed color image signal, wherein said received color image signal and said output color image signal in a combination of data of reference stimuli represented by vertices of a triangle of which one side circumscribes a pure purple locus and of which remaining two side circumscribes two points of a spectral locus of a color degree diagram, the two points representing substantially middle colors between a color represented by one vertex of the triangle at which the remaining two sides intersect and each of two colors represented by remaining two verticles of the triangle, respectively.
Claim 3
Dependent Claim
22 words
An apparatus according to claim 1, wherein the reference stimuli are represented in an xy coordinate system as follows: (0.734,0.2653) (-0.0860,1.0860) (0.0975,-0.0314).
Claim 4
Dependent Claim
19 words
An apparatus according to claim 1, wherein said image processing means in adapted for a color copying machine process.
Claim 5
Dependent Claim
16 words
An apparatus according to claim 1, further comprising supplying means for supplying the color image signal.
Claim 6
Dependent Claim
15 words
An apparatus according to claim 4, wherein said supplying means is a color image scanner.
Claim 7
Dependent Claim
14 words
An apparatus according to claim 1, wherein said color processing apparatus is a computer.
Claim 8
Dependent Claim
24 words
An apparatus according to claim 1, further comprising color image forming means for forming the color image based on the output color image signal.
Claim 9
Dependent Claim
15 words
An apparatus according to claim 7, wherein said color image forming means is a monitor.
Claim 10
Dependent Claim
17 words
An apparatus according to claim 7, wherein said color image forming means is an electrophotography system printer.
Claim 11
Dependent Claim
16 words
An apparatus according to claim 7, wherein said color image forming means is inkjet system printer.
Claim 12
Dependent Claim
116 words
A color processing apparatus comprising: data formatting means for formatting a color image signal which is a combination of data of reference stimuli represented by vertices of a triangle of which one side circumscribes a pure purple locus and of which remaining two sides circumscribes two points of a spectral locus of a color degree diagram, the two points of a spectral locus of a color degree diagram, the two points representing substantially middle colors between a color represented by one vertex of the triangle at which the remaining two sides intersect and each of two colors represented by remaining two vertices of the triangle, respectively; and transfer means for transferring the formatted color image signal.
Claim 13
Dependent Claim
116 words
A color processing apparatus comprising: data formatting means for formatting a color image signal which is a combination of data of reference stimuli represented by vertices of a triangle of which one side circumscribes a pure purple locus and of which remaining two sides circumscribes two points of a spectral locus of a color degree diagram, the two points of a spectral locus of a color degree diagram, the two points representing substantially middle colors between a color represented by one vertex of the triangle at which the remaining two sides intersect and each of two colors represented by remaining two vertices of the triangle, respectively; and transfer means for transferring the formatted color image signal.
Claim 14
Dependent Claim
23 words
An apparatus according to claim 11, wherein said transfer means transfers the color image signal by using a cable which connects each apparatus.
Claim 15
Dependent Claim
121 words
A color processing method comprising the steps of: receiving a color image signal; performing predetermined image processing of the received color image signal; and outputting a processed color image signal, wherein said received color image signal and said output color image signal is a combination of data of reference stimuli represented by vertices of a triangle of which one side circumscribes a pure purple locus and of which remaining two sides circumscribes two points of a spectral locus of a color degree diagram, the two points representing substantially middle colors between a color represented by one vertex of a triangle at which the remaining two sides intersect and each of two colors represented by remaining two vertices of the triangle, respectively.
Claim 16
Dependent Claim
121 words
A color processing method comprising the steps of: receiving a color image signal; performing predetermined image processing of the received color image signal; and outputting a processed color image signal, wherein said received color image signal and said output color image signal is a combination of data of reference stimuli represented by vertices of a triangle of which one side circumscribes a pure purple locus and of which remaining two sides circumscribes two points of a spectral locus of a color degree diagram, the two points representing substantially middle colors between a color represented by one vertex of a triangle at which the remaining two sides intersect and each of two colors represented by remaining two vertices of the triangle, respectively.
Claim 17
Dependent Claim
100 words
A color processing method comprising the steps of: formatting a color image signal which is a combination of data of reference stimuli represented by vertices of a triangle of which one side circumscribes a pure purple locus and of which remaining two sides circumscribes two points of a spectral locus of a color degree diagram, the two points representing substantially middle colors between a color represented by one vertex for the triangle at which the remaining two sides intersect and each of two colors represented by remaining two vertices of the triangle, respectively; and transferring the formatted color image signal.
Claim 18
Dependent Claim
100 words
A color processing method comprising the steps of: formatting a color image signal which is a combination of data of reference stimuli represented by vertices of a triangle of which one side circumscribes a pure purple locus and of which remaining two sides circumscribes two points of a spectral locus of a color degree diagram, the two points representing substantially middle colors between a color represented by one vertex for the triangle at which the remaining two sides intersect and each of two colors represented by remaining two vertices of the triangle, respectively; and transferring the formatted color image signal.
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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) | 1999-04-02 | 1999-10-02 | 2000-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-04-02 | 2003-10-02 | 2004-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-04-02 | 2007-10-02 | 2008-04-02 | $7700.00 | Window Closed / Lapsed |