US4908701A
Expired / Lapsed
US
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Color image processing method and apparatus for color adjustment during image processing
Assignee: Canon Inc
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Filing: 1988-03-04
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Granted: 1990-03-13
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Expires: 2008-03-04
Abstract
Abstract In a color image processing method, a dark point in a given color image is detected, a color component of the detected dark point is then detected, and a color component other than that of the dark point is corrected in accordance with the detected color component.
Inventors
- 👤 Yoshiro Udagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:10
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/6027
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
60 words
A color image processing method comprising the steps of: detecting a dark point in a color image; detecting a color component of the detected dark point; supplying a luminance signal other than that of the dark point; and correcting a color component other than that of the dark point in accordance with the luminance signal and the detected color component.
Claim 2
Dependent Claim
60 words
A color image processing method comprising the steps of: detecting a dark point in a color image; detecting a color component of the detected dark point; supplying a luminance signal other than that of the dark point; and correcting a color component other than that of the dark point in accordance with the luminance signal and the detected color component.
Claim 3
Dependent Claim
31 words
A color image processing method according to claim 1, wherein the color component other than the color component of the dark point is a signal represented by a color difference signal.
Claim 4
Dependent Claim
27 words
A color image processing method according to claim 2, further comprising the step of converting the color difference signal into a hue signal and a saturation signal.
Claim 5
Dependent Claim
32 words
A color image processing method according to claim 3, further comprising the step of outputting Y, M and C signals on the basis of the hue signal, saturation signal and luminance signal.
Claim 6
Dependent Claim
25 words
A color image processing method according to claim 4, further comprising the step of supplying the Y, M and C signals to a recording means.
Claim 7
Dependent Claim
77 words
A color image processing apparatus comprising: dark point detecting means for detecting a dark point in a color image; dark point color component detecting means for detecting a color component of the detected dark point; luminance signal supplying means for supplying a luminance signal other than that of the dark point; and correcting means for correcting a color component other than that of the dark point in accordance with the luminance signal and the detected color component.
Claim 8
Dependent Claim
77 words
A color image processing apparatus comprising: dark point detecting means for detecting a dark point in a color image; dark point color component detecting means for detecting a color component of the detected dark point; luminance signal supplying means for supplying a luminance signal other than that of the dark point; and correcting means for correcting a color component other than that of the dark point in accordance with the luminance signal and the detected color component.
Claim 9
Dependent Claim
31 words
A color image processing apparatus according to claim 6, wherein the color component other than the color component of the dark point is a signal represented by a color difference signal.
Claim 10
Dependent Claim
27 words
A color image processing apparatus according to claim 7, further comprising converting means for converting the color difference signal to a hue signal and a saturation signal.
Claim 11
Dependent Claim
32 words
A color image processing method according to claim 8, further comprising outputting means for outputting Y, M and C signals on the basis of the hue signal, saturation signal and luminance signal.
Claim 12
Dependent Claim
27 words
A color image processing apparatus according to claim 9, further comprising color signal supplying means for supplying the Y, M and C signals to a recording means.
Claim 13
Dependent Claim
55 words
A color image processing method comprising the steps of: producing a plurality of types of color signals from a color image; inputting one correction value to correct the plurality of color signals; and correcting the plurality of types of color signals by shifting the level of the signals in accordance with the one correction value.
Claim 14
Dependent Claim
55 words
A color image processing method comprising the steps of: producing a plurality of types of color signals from a color image; inputting one correction value to correct the plurality of color signals; and correcting the plurality of types of color signals by shifting the level of the signals in accordance with the one correction value.
Claim 15
Dependent Claim
20 words
A color image processing method according to claim 11, wherein the plurality of color signals are two color difference signals.
Claim 16
Dependent Claim
33 words
A color image processing method according to claim 11, wherein the correcting step is a step of adding or subtracting a predetermined value to or from the plurality of types of color signals.
Claim 17
Dependent Claim
22 words
A color image processing method according to claim 12, wherein the two color difference signals are signals generated from primary color signals.
Claim 18
Dependent Claim
61 words
A color image processing apparatus comprising: producing means for producing a plurality of types of color signals from a color image; inputting means for inputting one correction value to correct the plurality of color signals; and correcting means for correcting the plurality of types of color signals by shifting the level of the signals in accordance with the one correction value.
Claim 19
Dependent Claim
61 words
A color image processing apparatus comprising: producing means for producing a plurality of types of color signals from a color image; inputting means for inputting one correction value to correct the plurality of color signals; and correcting means for correcting the plurality of types of color signals by shifting the level of the signals in accordance with the one correction value.
Claim 20
Dependent Claim
20 words
A color image processing apparatus according to claim 15, wherein the plurality of color signals are two color difference signals.
Claim 21
Dependent Claim
32 words
A color image processing apparatus according to claim 15, wherein said correcting means comprises means for adding or subtracting a predetermined value to or from the plurality of types of color signals.
Claim 22
Dependent Claim
22 words
A color image processing apparatus according to claim 16, wherein the two color difference signals are signals generated from primary color signals.
Claim 23
Dependent Claim
65 words
A color image processing method comprising the steps of: detecting a dark point in a color image; detecting a color component of the detected dark point; detecting a highlight point in the color image; detecting a color component of the detected highlight point; and correcting a color component other than those of the dark point and highlight point in accordance with the detected color components.
Claim 24
Dependent Claim
65 words
A color image processing method comprising the steps of: detecting a dark point in a color image; detecting a color component of the detected dark point; detecting a highlight point in the color image; detecting a color component of the detected highlight point; and correcting a color component other than those of the dark point and highlight point in accordance with the detected color components.
Claim 25
Dependent Claim
89 words
A color image processing apparatus comprising: dark point detecting means for detecting a dark point in a color image; dark point color component detecting means for detecting a color component of the detected dark point; highlight point detecting means for detecting a highlight point in the color image; highlight point color component detecting means for detecting a color component of the detected highlight point; and correcting means for correcting a color component other than those of the dark point and highlight point in accordance with the detected color components.
Claim 26
Dependent Claim
89 words
A color image processing apparatus comprising: dark point detecting means for detecting a dark point in a color image; dark point color component detecting means for detecting a color component of the detected dark point; highlight point detecting means for detecting a highlight point in the color image; highlight point color component detecting means for detecting a color component of the detected highlight point; and correcting means for correcting a color component other than those of the dark point and highlight point in accordance with the detected color components.
Claim 27
Dependent Claim
57 words
A color image processing method comprising the steps of: producing a plurality of types of color signals from a color image; inputting one correction value to correct the plurality of color signals; correcting the plurality of types of color signals in accordance with the one correction value; and recording the corrected color signals on a recording medium.
Claim 28
Dependent Claim
57 words
A color image processing method comprising the steps of: producing a plurality of types of color signals from a color image; inputting one correction value to correct the plurality of color signals; correcting the plurality of types of color signals in accordance with the one correction value; and recording the corrected color signals on a recording medium.
Claim 29
Dependent Claim
20 words
A color image processing method according to claim 21, wherein the plurality of color signals are two color difference signals.
Claim 30
Dependent Claim
22 words
A color image processing method according to claim 22, wherein the two color difference signals are signals generated from primary color signals.
Claim 31
Dependent Claim
19 words
A color image processing method according to claim 21, wherein the recording step is performed using an ink-jet system.
Claim 32
Dependent Claim
73 words
A color image processing apparatus comprising: producing means for producing a plurality of types of color signals in a color image; inputting means for inputting one correction value to correct the plurality of color signals; correcting means for correcting the plurality of types of color signals in accordance with the one correction value; and recording means for recording the corrected color signals on a recording medium subsequent to correction by said correcting means.
Claim 33
Dependent Claim
73 words
A color image processing apparatus comprising: producing means for producing a plurality of types of color signals in a color image; inputting means for inputting one correction value to correct the plurality of color signals; correcting means for correcting the plurality of types of color signals in accordance with the one correction value; and recording means for recording the corrected color signals on a recording medium subsequent to correction by said correcting means.
Claim 34
Dependent Claim
20 words
A color image processing apparatus according to claim 25, wherein the plurality of color signals are two color difference signals.
Claim 35
Dependent Claim
22 words
A color image processing apparatus according to claim 26, wherein the two color difference signals are signals generated from primary color signals.
Claim 36
Dependent Claim
18 words
A color image processing apparatus according to claim 25, wherein said recording means includes an ink-jet recording head.
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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) | 1993-03-12 | 1993-09-11 | 1994-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-12 | 1997-09-11 | 1998-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-12 | 2001-09-11 | 2002-03-13 | $7700.00 | Window Closed / Lapsed |