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US6008912A
Expired / Lapsed
US
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Image processing device
Assignee: Panasonic System Solutions Japan Co Ltd
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Filing: 1998-05-29
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Granted: 1999-12-28
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Expires: 2018-05-29
Abstract
Abstract The invention is configured in such a manner that it has color correction means for color correcting to image data; and color correction controlling means for setting a matrix coefficient to said color correction means, said color correction controlling means calculating the optimum color correction coefficient from combination of specific variables which fulfill Conditions 1 and 2 below, and applying these optimum color correction coefficient to said matrix coefficient. Condition 1: Achromatic color data is not changed before or after color correction Condition 2: Luminance is not changed before or after color correction.
Inventors
- 👤 Shinichi Sato
- 👤 Kazuyuki Nishimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:06
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/603; H04N1/6033
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
87 words
An image processing device comprising: color correction means for color correcting to image data; and color correction controlling means for setting a matrix coefficient to said color correction means, said color correction controlling means calculating the optimum color correction coefficient from combination of specific variables which fulfill Conditions 1 and 2 below, and applying these optimum color correction coefficient to said matrix coefficient. Condition 1: Achromatic color data is not changed before or after color correction Condition 2: Luminance is not changed before or after color correction.
Claim 2
Dependent Claim
87 words
An image processing device comprising: color correction means for color correcting to image data; and color correction controlling means for setting a matrix coefficient to said color correction means, said color correction controlling means calculating the optimum color correction coefficient from combination of specific variables which fulfill Conditions 1 and 2 below, and applying these optimum color correction coefficient to said matrix coefficient. Condition 1: Achromatic color data is not changed before or after color correction Condition 2: Luminance is not changed before or after color correction.
Claim 3
Dependent Claim
31 words
The image processing device according to claim 1, wherein the number of the specific variable is four and the matrix coefficient has nine matrix coefficients of three rows and three columns.
Claim 4
Dependent Claim
89 words
The image processing device according to claim 2, wherein color sampling data is fed to the color correction means, the difference in color between a color data determined from three-stimulus XYZ values obtained by calculating the matrices in the color correction means and said color sampling data is calculated, the minimum difference in color is detected from all the differences in color corresponding to all the combinations of the specific variables, and the combination of variables with the minimum difference in color is converted into optimum color correction coefficient.
Claim 5
Dependent Claim
89 words
The image processing device according to claim 1, wherein color sampling data is fed to the color correction means, the difference in color between a color data determined from three-stimulus XYZ values obtained by calculating the matrices in the color correction means and said color sampling data is calculated, the minimum difference in color is detected from all the differences in color corresponding to all the combinations of the specific variables, and the combination of variables with the minimum difference in color is converted into a color correction coefficient.
Claim 6
Dependent Claim
49 words
The image processing device according to claim 1, wherein the matrix coefficient where the difference in color is smallest is calculated by a first resolution, and the matrix coefficient where the difference in color is smallest is calculated by a second resolution which is finer than the first resolution.
Claim 7
Dependent Claim
137 words
An image processing device comprising: color correction means for color correcting image data, which is input by scanning means, by using a matrix coefficient; a test pattern generator which generates pattern data for use in color correction; and color correction controlling means for determining a specific variable by using the difference in color between sample data containing color shifts from actually scan test pattern and said test patterns, to set said matrix coefficient by using the specific variable, said means color correction controlling means calculating the optimum color correction coefficients from specific combination of variables which fulfill Conditions 1 and 2 below, and applying these optimum color correction coefficients to said matrix coefficients Condition 1: Achromatic color data is not changed before or after color correction Condition 2: Luminance is not changed before or after color correction.
Claim 8
Dependent Claim
137 words
An image processing device comprising: color correction means for color correcting image data, which is input by scanning means, by using a matrix coefficient; a test pattern generator which generates pattern data for use in color correction; and color correction controlling means for determining a specific variable by using the difference in color between sample data containing color shifts from actually scan test pattern and said test patterns, to set said matrix coefficient by using the specific variable, said means color correction controlling means calculating the optimum color correction coefficients from specific combination of variables which fulfill Conditions 1 and 2 below, and applying these optimum color correction coefficients to said matrix coefficients Condition 1: Achromatic color data is not changed before or after color correction Condition 2: Luminance is not changed before or after color correction.
Claim 9
Dependent Claim
70 words
An image processing method comprising the steps of: color correcting to image data; generating a matrix coefficient; calculating an optimum color correction coefficient from combination of specific variables which fulfill Conditions 1 and 2 below; and applying these optimum color correction coefficient to said matrix coefficient Condition 1: Achromatic color data is not changed before or after color correction Condition 2: Luminance is not changed before or after color correction.
Claim 10
Dependent Claim
70 words
An image processing method comprising the steps of: color correcting to image data; generating a matrix coefficient; calculating an optimum color correction coefficient from combination of specific variables which fulfill Conditions 1 and 2 below; and applying these optimum color correction coefficient to said matrix coefficient Condition 1: Achromatic color data is not changed before or after color correction Condition 2: Luminance is not changed before or after color correction.
References Cited (Backward Citations)
US5202935A
Cited
US5357352A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-12-27 | 2003-06-28 | 2003-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-12-27 | 2007-06-28 | 2007-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-12-27 | 2011-06-28 | 2011-12-28 | $7700.00 | Window Closed / Lapsed |