US6027201A
Expired / Lapsed
US
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Recalibrating a multi-color imaging system
Assignee: Eastman Kodak Co
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Filing: 1998-11-20
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Granted: 2000-02-22
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Expires: 2018-11-20
Abstract
Abstract An apparatus and method for recalibrating a multi-color imaging system are provided. The multi-color imaging system is capable of applying different colorants to a substrate based on a plurality of input color values. The input color values control amounts of the colorants to be applied to the substrate by the imaging system. A subset of the input color values is selected and used to control the imaging system to apply one or more of the different colorants to the substrate, thereby forming a plurality of different color patches on the substrate. The subset of input color values is selected such that one or more of the different color patches is formed by application of a combination of at least two of the different colorants to the substrate. Color values are measured for each of the different color patches, and compared to reference color values, representing a calibrated condition of the imaging system. An error value is calculated. The error value represents a deviation of the measured color values from the reference color values. The input color values for each colorant then are independently adjusted to reduce the error value to a predetermined degree.
Inventors
- 👤 Christopher J. Edge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:00
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/40; H04N1/40006; H04N1/46; H04N1/56; H04N1/60; H04N1/603; H04N1/6033; H04N1/6036
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
185 words
A computer readable medium encoded with a computer program arranged such that, upon execution of the computer program, a processor performs a method for recalibrating a multi-color imaging system, wherein the imaging system is capable of forming different colors based on input color values, and wherein the input color values control amounts of the colors formed by the imaging system, the method comprising: controlling the imaging system to form different color combinations by combining two or more of the different colors; controlling a measuring device to measure color values for each of the different color combinations; comparing each of the measured color values to corresponding reference color values, the reference color values representing a calibrated condition of the imaging system; calculating an error value representing a deviation of the measured color values from the reference color values; and adjusting one or more of the input color values to reduce the error value to a predetermined degree, wherein the adjustment of the input color values for one of the colors is performed independently of the adjustment of the input color values for others of the colors.
Claim 2
Dependent Claim
185 words
A computer readable medium encoded with a computer program arranged such that, upon execution of the computer program, a processor performs a method for recalibrating a multi-color imaging system, wherein the imaging system is capable of forming different colors based on input color values, and wherein the input color values control amounts of the colors formed by the imaging system, the method comprising: controlling the imaging system to form different color combinations by combining two or more of the different colors; controlling a measuring device to measure color values for each of the different color combinations; comparing each of the measured color values to corresponding reference color values, the reference color values representing a calibrated condition of the imaging system; calculating an error value representing a deviation of the measured color values from the reference color values; and adjusting one or more of the input color values to reduce the error value to a predetermined degree, wherein the adjustment of the input color values for one of the colors is performed independently of the adjustment of the input color values for others of the colors.
Claim 3
Dependent Claim
75 words
The computer medium of claim 1, wherein the adjusting act further includes: accessing a color correction lookup table, wherein the color correction lookup table has a plurality of dimensions, each of the dimensions mapping at least a collection of the input color values to corrected input color values for one of the different colors, and adjusting the corrected input color values of the correction lookup table to reduce the error value to the predetermined degree.
Claim 4
Dependent Claim
27 words
The computer readable medium of claim 1, wherein one or more of the different color combinations includes a combination of at least three of the different colors.
Claim 5
Dependent Claim
20 words
The computer readable medium of claim 1, wherein the different color combinations consist of less than seven different color combinations.
Claim 6
Dependent Claim
20 words
The computer readable medium of claim 1, wherein the different color combinations consist of less than eight different color combinations.
Claim 7
Dependent Claim
20 words
The computer readable medium of claim 1, wherein the different color combinations consist of less than nineteen different color combinations.
Claim 8
Dependent Claim
20 words
The computer readable medium of claim 1, wherein the different color combinations consist of less than twenty-three different color combinations.
Claim 9
Dependent Claim
69 words
The computer readable medium of claim 1, wherein: one of the different color combinations includes a combination of at least three of the different colors in highlight-tone amounts, one of the different color combinations includes a combination of at least three of the different colors in quarter-tone amounts, and one of the different color combinations includes a combination of at least three of the different colors in mid-tone amounts.
Claim 10
Dependent Claim
29 words
The computer readable medium of claim 8, wherein one of the different color combinations includes a combination of at least three of the different colors in three-quarter tone amounts.
Claim 11
Dependent Claim
75 words
The computer readable medium of claim 9, wherein: each of a first subset of the different color combinations includes a single one of the different colors in a highlight-tone amount, each of a second subset of the different color combinations includes a single one of the different colors in a quarter-tone amount, and each of a third subset of the different color combinations includes a single one of the different colors in a mid-tone amount.
Claim 12
Dependent Claim
30 words
The computer readable medium of claim 10, wherein each of a plurality of the different color combinations includes a single one of the different colorants in a three-quarter tone amount.
Claim 13
Dependent Claim
75 words
The computer readable medium of claim 8, wherein: one of the different color combinations includes a combination of a first and a second of the different colors in saturated-tone amounts, one of the different color combinations includes a combination of the first and a third of the different colors in saturated-tone amounts, and one of the different color combinations includes a combination of the second and the third of the different colors in saturated-tone amounts.
Claim 14
Dependent Claim
75 words
The computer readable medium of claim 1, wherein: one of the different color combinations includes a combination of a first and a second of the different colorants in saturated-tone amounts, one of the different color combinations includes a combination of the first and a third of the different colorants in saturated-tone amounts, and one of the different color combinations includes a combination of the second and the third of the different colorants in saturated-tone amounts.
Claim 15
Dependent Claim
18 words
The computer readable medium of claim 1, wherein the different colors comprise cyan, magenta, yellow, and black colorants.
Claim 16
Dependent Claim
39 words
The computer readable medium of claim 1, wherein the act of controlling the measuring device includes controlling the measuring device to measure the color values in one of a plurality of system-independent color coordinate systems including L*a*b* and XYZ.
Claim 17
Dependent Claim
64 words
The computer readable medium of claim 1, wherein the act of controlling the measuring device includes controlling the measuring device to measure the color values in one of a plurality of system-dependent color coordinate systems including RGB and density CMY, the method further comprising converting the measured color values into one of a plurality of system independent color coordinate systems including L*a*b* and XYZ.
Claim 18
Independent Claim
125 words
A method for recalibrating a multi-color imaging system comprising: forming different color combinations, wherein one or more of the different color combinations includes at least two of the different colors; measuring color values for each of the different color combinations; comparing each of the measured color values to corresponding reference color values that represent a calibrated condition of the imaging system; calculating an error value that represents a deviation of the measured color values from the reference color values; and adjusting one or more of the color values to reduce the error value to a predetermined degree, wherein the adjustment of the color values for one of the colors is performed independently of the adjustment of the input color values for others of the colors.
Claim 19
Independent Claim
125 words
A method for recalibrating a multi-color imaging system comprising: forming different color combinations, wherein one or more of the different color combinations includes at least two of the different colors; measuring color values for each of the different color combinations; comparing each of the measured color values to corresponding reference color values that represent a calibrated condition of the imaging system; calculating an error value that represents a deviation of the measured color values from the reference color values; and adjusting one or more of the color values to reduce the error value to a predetermined degree, wherein the adjustment of the color values for one of the colors is performed independently of the adjustment of the input color values for others of the colors.
Claim 20
Dependent Claim
30 words
The method of claim 17, wherein the forming act includes forming one or more of the different color combinations by a combination of at least three of the different colors.
Claim 21
Dependent Claim
96 words
The method of claim 17, wherein the forming act includes: forming one of the different color combinations by a combination of at least three of the different colors in highlight-tone amounts, forming one of the different color combinations by a combination of at least three of the different colors in quarter-tone amounts, forming one of the different color combinations by a combination of at least three of the different colors in mid-tone amounts, and forming one of the different color combinations by a combination of at least three of the different colors in three-quarter tone amounts.
Claim 22
Dependent Claim
158 words
A computer readable medium encoded with a computer program arranged such that, upon execution of the computer program, a processor performs a method for recalibrating a multi-color imaging system, the method comprising: controlling the imaging system to form different color combinations, wherein one or more of the different color combinations includes at least two of the different colors; controlling a measuring device to measure color values for each of the different color combinations; comparing each of the measured color values to corresponding reference color values that represent a calibrated condition of the imaging system; calculating an error value that represents a deviation of the measured color values from the reference color values; and adjusting one or more of the color values to reduce the error value to a predetermined degree, wherein the adjustment of the color values for one of the colors is performed independently of the adjustment of the input color values for others of the colors.
Claim 23
Dependent Claim
158 words
A computer readable medium encoded with a computer program arranged such that, upon execution of the computer program, a processor performs a method for recalibrating a multi-color imaging system, the method comprising: controlling the imaging system to form different color combinations, wherein one or more of the different color combinations includes at least two of the different colors; controlling a measuring device to measure color values for each of the different color combinations; comparing each of the measured color values to corresponding reference color values that represent a calibrated condition of the imaging system; calculating an error value that represents a deviation of the measured color values from the reference color values; and adjusting one or more of the color values to reduce the error value to a predetermined degree, wherein the adjustment of the color values for one of the colors is performed independently of the adjustment of the input color values for others of the colors.
Claim 24
Dependent Claim
27 words
The computer readable medium of claim 20, wherein one or more of the different color combinations includes a combination of at least three of the different colors.
Claim 25
Dependent Claim
90 words
The computer readable medium of claim 20, wherein: one of the different color combinations includes a combination of at least three of the different colors in highlight-tone amounts, one of the different color combinations includes a combination of at least three of the different colors in quarter-tone amounts, one of the different color combinations includes a combination of at least three of the different colors in mid-tone amounts, and one of the different color combinations includes a combination of at least three of the different colors in three-quarter tone amounts.
References Cited (Backward Citations)
US3612753A
Cited
DE2328874A1
Cited
US4500919A
Cited
US4717954A
Cited
EP0144188A2
Cited
US4721951A
Cited
US4959711A
Cited
US5065234A
Cited
US4929978A
Cited
US4839722A
Cited
US5121196A
Cited
JPH02136848A
Cited
EP0398502A2
Cited
US5339176A
Cited
US5313291A
Cited
US5258810A
Cited
US5309257A
Cited
EP0556133A2
Cited
US5333069A
Cited
US5363318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-02-21 | 2003-08-23 | 2004-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-02-21 | 2007-08-23 | 2008-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-02-21 | 2011-08-23 | 2012-02-22 | $7700.00 | Window Closed / Lapsed |