US5146346A
Expired / Lapsed
US
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Method for displaying and printing multitone images derived from grayscale images
Assignee: Adobe Inc
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Filing: 1991-06-14
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Granted: 1992-09-08
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Expires: 2011-06-14
Abstract
Abstract The method of displaying multitone images beginning with a grayscale original image capable of displaying a specific number of gray levels, which includes the steps of: (1) selecting a plurality of colors from the image, one for each of the multitones, each having a color value; (2) selecting a plurality of transfer functions, one for each of the selected colors; (3) converting each of the shades of gray, using the respective color values and the transfer functions, into a new color value; and (4) displaying the resultant multitone image on a video display terminal using the new color values in place of the shades of gray. The displayed image may be printed using one printing plate for each of the selected colors, and using the same transfer functions to convert the shades of gray to new gray values which are subsequently converted into halftone dots for each printing plate.
Inventors
- 👤 Thomas Knoll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:29
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/465
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
108 words
A method for displaying multitone images derived from a grayscale image having a predetermined number of shades of gray, comprising: selecting a plurality of ink colors for said image, one for each of said multitones, each of said ink colors having an ink color value; selecting a plurality of ink transfer, functions, one for each of said plurality of selected ink colors; converting each of said shades of gray, using said respective ink color values and said ink transfer functions, into a new ink color value; and displaying said image on a video display terminal using said new ink color values in place of said shades of gray.
Claim 2
Independent Claim
108 words
A method for displaying multitone images derived from a grayscale image having a predetermined number of shades of gray, comprising: selecting a plurality of ink colors for said image, one for each of said multitones, each of said ink colors having an ink color value; selecting a plurality of ink transfer, functions, one for each of said plurality of selected ink colors; converting each of said shades of gray, using said respective ink color values and said ink transfer functions, into a new ink color value; and displaying said image on a video display terminal using said new ink color values in place of said shades of gray.
Claim 3
Independent Claim
142 words
A method for displaying and printing multitone images derived from a grayscale image having a predetermined number of shades of gray, comprising: selecting a plurality of ink colors for said image, one for each of said multitones, each of said ink colors having an ink color value; selecting a plurality of ink transfer functions, one for each of said plurality of selected ink colors; converting each of said shades of gray, using said respective ink transfer functions and ink color values, into a new color value; displaying said image on a video display terminal using said new ink color values in place of said shades of gray; and printing the displayed image using a plurality of printing plates, one for each ink color, using said ink transfer functions to convert said shades of gray to new gray values for each printing plate.
Claim 4
Independent Claim
142 words
A method for displaying and printing multitone images derived from a grayscale image having a predetermined number of shades of gray, comprising: selecting a plurality of ink colors for said image, one for each of said multitones, each of said ink colors having an ink color value; selecting a plurality of ink transfer functions, one for each of said plurality of selected ink colors; converting each of said shades of gray, using said respective ink transfer functions and ink color values, into a new color value; displaying said image on a video display terminal using said new ink color values in place of said shades of gray; and printing the displayed image using a plurality of printing plates, one for each ink color, using said ink transfer functions to convert said shades of gray to new gray values for each printing plate.
Claim 5
Dependent Claim
30 words
The method of claim 2 for displaying and printing multitone images derived from a grayscale image, wherein said new gray values are converted into halftone dots for each printing plate.
References Cited (Backward Citations)
US4719506A
Cited
US4998165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-09-08 | 1996-03-09 | 1996-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-08 | 2000-03-09 | 2000-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-08 | 2004-03-09 | 2004-09-08 | $7700.00 | Window Closed / Lapsed |