Patent US5412491A successfully refreshed from Google Patents.
US5412491A
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US
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Apparatus and method for color transformation
Assignee: Kodak IL Ltd
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Filing: 1994-03-31
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Granted: 1995-05-02
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Expires: 2014-03-31
Abstract
Abstract Color transformation apparatus for transforming an input color space into an output color space and including a first LUT for transforming a first portion of the input color space into a corresponding first portion of the output color space, a second LUT for transforming a second portion of the input color space into a corresponding second portion of the output color space, and a control unit for channeling input values included in the first and second portions of the color space to the first and second LUTs respectively.
Inventors
- 👤 Avraham Bachar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:03
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/62; H04N1/628; H04N1/6016; H04N1/6022; H04N1/6025
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
190 words
Color transformation apparatus for transforming an input color space into an output color space and comprising: a first LUT, including memory cells, for transforming a first portion of the input color space into a corresponding first portion of the output color space; a second LUT, including memory cells, for transforming a second portion of the input color space into a corresponding second portion of the output color space; a control unit for channeling input values included in the first and second portions of the color space to the first and second LUTs respectively, a ratio of the number of memory cells in the first LUT and the number of possible input values channeled thereto differs from a corresponding ratio for the second LUT; and at least one more LUT for transforming a corresponding one of at least one more portion of the input color space into a corresponding portion of the output color space, the control unit also being operative to channel input values included in each of the at least one more portion of the input color space to a corresponding one of the at least one more LUTs.
Claim 2
Dependent Claim
190 words
Color transformation apparatus for transforming an input color space into an output color space and comprising: a first LUT, including memory cells, for transforming a first portion of the input color space into a corresponding first portion of the output color space; a second LUT, including memory cells, for transforming a second portion of the input color space into a corresponding second portion of the output color space; a control unit for channeling input values included in the first and second portions of the color space to the first and second LUTs respectively, a ratio of the number of memory cells in the first LUT and the number of possible input values channeled thereto differs from a corresponding ratio for the second LUT; and at least one more LUT for transforming a corresponding one of at least one more portion of the input color space into a corresponding portion of the output color space, the control unit also being operative to channel input values included in each of the at least one more portion of the input color space to a corresponding one of the at least one more LUTs.
Claim 3
Dependent Claim
22 words
Apparatus according to claim 1 wherein the input color space portions corresponding to all but one of the LUTs include memorial colors.
Claim 4
Dependent Claim
184 words
A color transformation method for operating a color transformation on an input color space, thereby to transform the input color space into an output color space and comprising the steps of: channeling input values included in the first and second portions of the input color space, respectively, to memory cells of first and second LUTs respectively. employing the first LUT to transform the first portion of the input color space into a corresponding first portion of the output color space: employing the second LUT to transform the second portion of the input color space into a corresponding second portion of the output color space, providing a ratio of the number of memory cells in the first LUT and the number of possible input values channeled thereto which differs from a corresponding ratio for the second LUT; and channeling at least one more portion of the input color space to at least one more LUT, and employing the at least one more LUT to transform the at least one more portion of the input color space into a corresponding portion of the output color space.
Claim 5
Dependent Claim
184 words
A color transformation method for operating a color transformation on an input color space, thereby to transform the input color space into an output color space and comprising the steps of: channeling input values included in the first and second portions of the input color space, respectively, to memory cells of first and second LUTs respectively. employing the first LUT to transform the first portion of the input color space into a corresponding first portion of the output color space: employing the second LUT to transform the second portion of the input color space into a corresponding second portion of the output color space, providing a ratio of the number of memory cells in the first LUT and the number of possible input values channeled thereto which differs from a corresponding ratio for the second LUT; and channeling at least one more portion of the input color space to at least one more LUT, and employing the at least one more LUT to transform the at least one more portion of the input color space into a corresponding portion of the output color space.
Claim 6
Dependent Claim
35 words
A method according to claim 3 wherein the first and second portions of the input color space are defined irrespective of the distribution of any particular set of input values within the input color space.
Claim 7
Dependent Claim
24 words
A method according to claim 3 wherein at least one of the first and second portions of the input color space comprises memorial colors.
References Cited (Backward Citations)
US4839721A
Cited
JPS6160068A
Cited
US4992861A
Cited
EP0366309A2
Cited
US4941039A
Cited
EP0487304A2
Cited
GB2260669A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-05-01 | 1998-10-31 | 1999-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-01 | 2002-10-31 | 2003-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-01 | 2006-10-31 | 2007-05-02 | $7700.00 | Window Closed / Lapsed |