US6891649B1
Expired / Lapsed
US
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Method of and apparatus for generating color conversion table and apparatus for generating proof using color conversion table
Assignee: Fujifilm Holdings Corp
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Filing: 2000-07-25
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Granted: 2005-05-10
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Expires: 2020-07-25
Abstract
Abstract For converting color data to be processed by a first device into color data to be processed by a second device, using a color conversion table, a constraint condition is set between the color data, and a color conversion table between at least portions of the color data is generated according to the constraint conditions, whereas a color conversion table between remainders of the color data is generated in calorimetric association therewith.
Inventors
- 👤 Hirokazu Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:57
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/603; H04N1/6052; H04N1/6016; H04N1/6022; H04N1/6025
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
159 words
A method of generating a color conversion table for converting first color data D to be processed by a first device into second color data D′ to be processed by a second device, comprising the steps of: determining a first calorimetric value of a first color obtained by processing the first color data D with the first device; determining a second colorimetric value of a second color obtained by processing the second color data D′ with the second device: establishing a color conversion table such that said first colorimetric value is equalized to said second colorimetric value; establishing a constraint condition to constrain color conversion relationships of said color conversion table between portions of said first and second color data D and D′ after establishing the color conversion table; and modifying the color conversion table between portions of said first and second color data D and D′ according to said constraint condition for generating a new color conversion table.
Claim 2
Independent Claim
159 words
A method of generating a color conversion table for converting first color data D to be processed by a first device into second color data D′ to be processed by a second device, comprising the steps of: determining a first calorimetric value of a first color obtained by processing the first color data D with the first device; determining a second colorimetric value of a second color obtained by processing the second color data D′ with the second device: establishing a color conversion table such that said first colorimetric value is equalized to said second colorimetric value; establishing a constraint condition to constrain color conversion relationships of said color conversion table between portions of said first and second color data D and D′ after establishing the color conversion table; and modifying the color conversion table between portions of said first and second color data D and D′ according to said constraint condition for generating a new color conversion table.
Claim 3
Dependent Claim
28 words
A method according to claim 1 , wherein said constraint condition comprises a condition for constraining a relationship for converting color data of at least one primary color.
Claim 4
Dependent Claim
28 words
A method according to claim 1 , wherein said constraint condition comprises a condition for constraining a relationship for converting color data of at least one secondary color.
Claim 5
Dependent Claim
36 words
A method according to claim 1 , wherein said constraint condition comprises a condition for equalizing halftone dot area percentages of particular ranges in said portions of said first and second color data D and D′.
Claim 6
Dependent Claim
45 words
A method according to claim 4 , wherein said particular range is established in at least one of a highlight area of said first and second color data D and D′ and a shadow area of said first and second color data D and D′.
Claim 7
Dependent Claim
82 words
A method according to claim 4 , wherein said constraint condition comprises a condition for equalizing the halftone dot area percentages of said particular ranges in said portions of said first and second color data D and D′, and a condition for gradually shifting halftone dot area percentages of junction ranges between said particular ranges and other ranges from the halftone dot area percentage of said first color data D to the halftone dot area percentage of said second color data D′.
Claim 8
Dependent Claim
46 words
A method according to claim 6 , wherein said condition for gradually shifting the halftone dot area percentages of the junction ranges comprises a condition for interpolating the halftone dot area percentages of said particular ranges and the halftone dot area percentages of the junction ranges.
Claim 9
Dependent Claim
31 words
A method according to claim 1 , wherein said constraint condition comprises a condition for equalizing dot gains of said portions of said first and second color data D and D′.
Claim 10
Independent Claim
178 words
An apparatus for generating a color conversion table for converting first color data D to be processed by a first device into second color data D′ to be processed by a second device, comprising: color conversion table establishing means for establishing a color conversion table such that a first colorimetric value of a first color is equalized to a second colorimetric value of a second color, said first colorimetric value being determined based on the first color obtained by processing the first color data D with the first device, said second calorimetric value being determined based on the second color obtained by processing the second color data D′ with the second device; constraint condition setting means for setting a constraint condition of conversion relationships of said color conversion table between portions of said first and second color data D and D′; and color conversion table modifying means for modifying said color conversion table between said portions of said first and second color data D and D′ according to said constraint condition, and generating a new color conversion table.
Claim 11
Independent Claim
178 words
An apparatus for generating a color conversion table for converting first color data D to be processed by a first device into second color data D′ to be processed by a second device, comprising: color conversion table establishing means for establishing a color conversion table such that a first colorimetric value of a first color is equalized to a second colorimetric value of a second color, said first colorimetric value being determined based on the first color obtained by processing the first color data D with the first device, said second calorimetric value being determined based on the second color obtained by processing the second color data D′ with the second device; constraint condition setting means for setting a constraint condition of conversion relationships of said color conversion table between portions of said first and second color data D and D′; and color conversion table modifying means for modifying said color conversion table between said portions of said first and second color data D and D′ according to said constraint condition, and generating a new color conversion table.
Claim 12
Dependent Claim
38 words
An apparatus according to claim 9 , wherein said constraint condition setting means comprises: constraint condition storage means for storing constraint conditions; and constraint condition selecting means for selecting the constraint condition from said constraint condition storage means.
Claim 13
Dependent Claim
66 words
An apparatus according to claim 9 , further comprising: color conversion table storage means for storing a color conversion table in colorimetric association between said first and second color data D and D′; said color conversion table modifying means comprising means for modifying said color conversion table stored in said color conversion table storage means into a new color conversion table based on said constraint condition.
Claim 14
Dependent Claim
63 words
An apparatus according to claim 11 , wherein said color conversion table storage means comprises: a first profile storage unit for storing a first profile representing a conversion relationship between said first color data D and colorimetric data; and a second profile storage unit for storing a second profile representing a conversion relationship between said calorimetric data and said second color data D′.
Claim 15
Dependent Claim
39 words
An apparatus according to claim 12 , wherein said first profile comprises a profile established depending on printing conditions of said first device, and said second profile comprises a profile established depending on output conditions of said second device.
Claim 16
Independent Claim
245 words
An apparatus for generating a proof by converting image data composed of first color data D to be processed by a first device into image data composed of second color data D′ to be processed by a second device, using a color conversion table, and generating a proof of an image produced by said first device with said second device, comprising: color conversion table establishing means for establishing a color conversion table such that a first calorimetric value of a first color is equalized to a second calorimetric value of a second color, said first calorimetric value being determined based on the first color obtained by processing the first color data D with the first device, said second calorimetric value being determined based on the second color obtained by processing the second color data D′ with the second device; constraint condition setting means for setting a constraint condition of conversion relationships of said color conversion table between portions of said first and second color data D and D′; color conversion table modifying means for modifying said color conversion table between said first and second color data D and D′ according to said constraint condition, and generating a new color conversion table; color converting means for converting said first color data D into said second color data D′ using said color conversion table generated by said color conversion table modifying means; and proof output means for outputting said proof based on said second color data D′.
Claim 17
Independent Claim
245 words
An apparatus for generating a proof by converting image data composed of first color data D to be processed by a first device into image data composed of second color data D′ to be processed by a second device, using a color conversion table, and generating a proof of an image produced by said first device with said second device, comprising: color conversion table establishing means for establishing a color conversion table such that a first calorimetric value of a first color is equalized to a second calorimetric value of a second color, said first calorimetric value being determined based on the first color obtained by processing the first color data D with the first device, said second calorimetric value being determined based on the second color obtained by processing the second color data D′ with the second device; constraint condition setting means for setting a constraint condition of conversion relationships of said color conversion table between portions of said first and second color data D and D′; color conversion table modifying means for modifying said color conversion table between said first and second color data D and D′ according to said constraint condition, and generating a new color conversion table; color converting means for converting said first color data D into said second color data D′ using said color conversion table generated by said color conversion table modifying means; and proof output means for outputting said proof based on said second color data D′.
Claim 18
Dependent Claim
38 words
An apparatus according to claim 14 , wherein said constraint condition setting means comprises: constraint condition storage means for storing constraint conditions; and constraint condition selecting means for selecting the constraint condition from said constraint condition storage means.
Claim 19
Dependent Claim
68 words
An apparatus according to claim 14 , further comprising: color conversion table storage means for storing a color conversion table in colorimetric association between said first color data D and said second color data D′; said color conversion table modifying means comprising means for modifying said color conversion table stored in said color conversion table storage means into a new color conversion table based on said constraint condition.
Claim 20
Dependent Claim
15 words
An apparatus according to claim 14 , wherein said proof output means comprises a printer.
Claim 21
Dependent Claim
27 words
A method according to claim 1 , wherein said constraint condition is set independently of said output characteristics and printing conditions of the first and second devices.
Claim 22
Dependent Claim
31 words
An apparatus according to claim 9 , wherein said constraint condition setting means sets said constraint condition independently of said output characteristics and printing conditions of the first and second devices.
Claim 23
Dependent Claim
31 words
An apparatus according to claim 14 , wherein said constraint condition setting means sets said constraint condition independently of said output characteristics and printing conditions of the first and second devices.
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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) | 2008-05-09 | 2008-11-08 | 2009-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2012-05-09 | 2012-11-08 | 2013-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2016-05-09 | 2016-11-08 | 2017-05-10 | $7700.00 | Window Closed / Lapsed |