Patent US5973801A successfully refreshed from Google Patents.
US5973801A
Expired / Lapsed
US
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Method for matching colors of an object to printing colors
Assignee: Kodak IL Ltd
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Filing: 1996-07-10
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Granted: 1999-10-26
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Expires: 2016-07-10
Abstract
Abstract A method for automatically matching the color of a printed representation of an object or swatch to that of the object or swatch itself is provided. The method includes the steps of measuring the colors of the object with a calorimeter. An object image, showing mainly the object, is produced and a representative image color is determined. From the colors of the object (as measured by a colorimeter or some other color measuring device), a representative object color is determined. Finally, the colors of the object image in the vicinity, in color space, of the representative image color are corrected to colors in the vicinity, also in color space, of the representative object color.
Inventors
- 👤 Yoav Bresler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:58
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/62
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
267 words
A method for determining the colors with which to print an image of an object such that printed output colors approximately match colors of the object, the method comprising the steps of: measuring colors of said object; determining a representative image color of an object image showing mainly said object having colors, some of said colors being in vicinity, in color space, of a representative object color; measuring a representative sample of a color gamut of a printing press on which said image is to be printed, thereby to provide a color conversion book converting from ink values to colorimeter values; determining a representative object color of said colors of said object, the stop of determining comprising the steps of: providing the colors of said object in luminance, hue and saturation color space; generating representative luminance, hue and saturation values over said colors of said object; the step of generating comprising the steps of: generating a histogram of saturation weighted hue from hue and saturation values of said colors of said object; selecting a hue value having the highest saturation level as a representative hue; generating a saturation level close to the saturation level at which said representative hue was found; and generating a luminance level associated with said representative hue; utilizing said color book to convert said representative luminance, hue and saturation values to representative inking values forming said representative object color; and correcting the colors of said object image which are in the vicinity, in color space, of said representative image color, to colors in the vicinity, in color space, of said representative object color.
Claim 2
Independent Claim
267 words
A method for determining the colors with which to print an image of an object such that printed output colors approximately match colors of the object, the method comprising the steps of: measuring colors of said object; determining a representative image color of an object image showing mainly said object having colors, some of said colors being in vicinity, in color space, of a representative object color; measuring a representative sample of a color gamut of a printing press on which said image is to be printed, thereby to provide a color conversion book converting from ink values to colorimeter values; determining a representative object color of said colors of said object, the stop of determining comprising the steps of: providing the colors of said object in luminance, hue and saturation color space; generating representative luminance, hue and saturation values over said colors of said object; the step of generating comprising the steps of: generating a histogram of saturation weighted hue from hue and saturation values of said colors of said object; selecting a hue value having the highest saturation level as a representative hue; generating a saturation level close to the saturation level at which said representative hue was found; and generating a luminance level associated with said representative hue; utilizing said color book to convert said representative luminance, hue and saturation values to representative inking values forming said representative object color; and correcting the colors of said object image which are in the vicinity, in color space, of said representative image color, to colors in the vicinity, in color space, of said representative object color.
Claim 3
Independent Claim
211 words
A method for determining the colors with which to print an image of an object such that printed output colors approximately match colors of the object, the method comprising the steps of: measuring colors of said object; measuring a representative sample of a color gamut of a printing press on which said image is to be printed, thereby to provide a color conversion book converting from ink values to colorimeter values; determining a representative image color of an object image showing mainly said object having colors, some of said colors being in vicinity, in color space, of a representative object color; the step of determining comprising the steps of: utilizing said color book to convert the colors of said object image from inking values to their luminance, hue and saturation values; generating representative luminance, hue and saturation values over said colors of said object image; utilizing said color book to convert said representative luminance, hue and saturation values to representative inking values forming said representative image color; determining a representative object color of said colors of said object; correcting the colors of said object image which are in the vicinity, in color space, of said representative image color, to colors in the vicinity, in color space, of said representative object color.
Claim 4
Independent Claim
211 words
A method for determining the colors with which to print an image of an object such that printed output colors approximately match colors of the object, the method comprising the steps of: measuring colors of said object; measuring a representative sample of a color gamut of a printing press on which said image is to be printed, thereby to provide a color conversion book converting from ink values to colorimeter values; determining a representative image color of an object image showing mainly said object having colors, some of said colors being in vicinity, in color space, of a representative object color; the step of determining comprising the steps of: utilizing said color book to convert the colors of said object image from inking values to their luminance, hue and saturation values; generating representative luminance, hue and saturation values over said colors of said object image; utilizing said color book to convert said representative luminance, hue and saturation values to representative inking values forming said representative image color; determining a representative object color of said colors of said object; correcting the colors of said object image which are in the vicinity, in color space, of said representative image color, to colors in the vicinity, in color space, of said representative object color.
Claim 5
Dependent Claim
91 words
A method according to claim 2 and wherein said step of generating representative luminance, hue and saturation values over said colors of said object image comprises the steps of: generating a histogram of saturation weighted hue from the hue and saturation values of said colors of said object image; selecting a hue value having a highest saturation level, as the representative hue value; generating the saturation level close to the saturation level at which said representative hue value was found; and generating a luminance level associated with said representative hue value.
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USPTO Annuity & Maintenance Windows
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| 3.5 Years (Year 4) | 2002-10-25 | 2003-04-26 | 2003-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-10-25 | 2007-04-26 | 2007-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-10-25 | 2011-04-26 | 2011-10-26 | $7700.00 | Window Closed / Lapsed |