Patent US5079721A successfully refreshed from Google Patents.
US5079721A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for generating a screened reproduction of an image
Assignee: Kodak IL Ltd
•
Filing: 1990-05-18
•
Granted: 1992-01-07
•
Expires: 2010-05-18
Abstract
Abstract A technique for generating a screened reproduction of an image comprising the steps of providing a representation of an original having input density values representing the grey levels of various locations of the original for a given color separation, defining a desired screen dot arrangement for the image, writing screen dots in a line by line fashion, wherein each screen dot is made up of a plurality of lines whose length and location determines the dot configuration and whose length and location is determined by an analog operation employing the input density values of the original and the desired screen dot arrangement. Apparatus employing the method is also provided.
Inventors
- 👤 Moshe A. Gershony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:44
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/40; H04N1/405; H04N1/4055
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
132 words
A technique for generating a screened reproduction of an image comprising the steps of: providing a representation of an original having input density values representing the grey levels of various locations of the original for a given color separation; defining a desired screen dot arrangement for the image in which threshold values are associated with corresponding locations in an x-y plane; representing the threshold values for a line in said x-y plane by an analog signal; comparing in an analog manner the input density values of various locations with corresponding ones of said threshold values represented by said analog signal; and writing screen dots in a line by line fashion, wherein each screen dot is made up of a plurality of lines whose length and location is determined by said comparing step.
Claim 2
Dependent Claim
132 words
A technique for generating a screened reproduction of an image comprising the steps of: providing a representation of an original having input density values representing the grey levels of various locations of the original for a given color separation; defining a desired screen dot arrangement for the image in which threshold values are associated with corresponding locations in an x-y plane; representing the threshold values for a line in said x-y plane by an analog signal; comparing in an analog manner the input density values of various locations with corresponding ones of said threshold values represented by said analog signal; and writing screen dots in a line by line fashion, wherein each screen dot is made up of a plurality of lines whose length and location is determined by said comparing step.
Claim 3
Dependent Claim
20 words
A technique according to claim 1 and wherein each of said plurality of lines has infinite resolution along its length.
Claim 4
Dependent Claim
42 words
A technique according to claim 1 and also including the following steps: storing the input density values of the original at a first spatial resolution; and storing the threshold values of the desired screen dot arrangement in the form of analog functions.
Claim 5
Dependent Claim
46 words
A technique according to claim 1 and also including the following steps: storing the input density values of the original at a first spatial resolution; and storing the threshold values of the desired screen dot arrangement at a second spatial resolution different from the first resolution.
Claim 6
Dependent Claim
34 words
A technique according ot claim 1 and wherein the spacing between adjacent lines in said x-y plane corresponds to the line to line spatial resolution of a plotter used for writing the screen dots.
Claim 7
Dependent Claim
51 words
A technique according to claim 4 and wherein the step of storing the threshold values of the desired screen dot for a given line in said x-y plane includes the step of digitally storing the values at a third sampling resolution, which may be different from said first and second resolutions.
Claim 8
Dependent Claim
24 words
A technique according to cliam 1 and wherein each said line in said x-y plane lies at an angle corresponding to a screening angle.
Claim 9
Dependent Claim
24 words
A technique according to cliam 1 and wherein each said line in said x-y plane lies at an angle corresponding to a screening angle.
Claim 10
Dependent Claim
139 words
Apparatus for generating a screened reproduction of an image comprising: means for providing a representation of an original having input density values representing the grey levels of various locations of the original for a given color separation; means for defining a desired screen dot arrangement for the image in which threshold values are associated with corresponding locations in an x-y plane; means for representing the threshold values for a line in said x-y plane by an analog signal; means for comparing in an analog manner the input density values of various locations with corresponding ones of said threshold values represented by said analog signal; and means for writing screen dots in a line by line fashion, wherien each screen dot is made up of a plurality o lines whose length and location is determined by said means for comparing.
Claim 11
Dependent Claim
139 words
Apparatus for generating a screened reproduction of an image comprising: means for providing a representation of an original having input density values representing the grey levels of various locations of the original for a given color separation; means for defining a desired screen dot arrangement for the image in which threshold values are associated with corresponding locations in an x-y plane; means for representing the threshold values for a line in said x-y plane by an analog signal; means for comparing in an analog manner the input density values of various locations with corresponding ones of said threshold values represented by said analog signal; and means for writing screen dots in a line by line fashion, wherien each screen dot is made up of a plurality o lines whose length and location is determined by said means for comparing.
Claim 12
Dependent Claim
19 words
Apparatus according to claim 8 and wherein each of said plurality of lines has infinite resolution along its length.
Claim 13
Dependent Claim
42 words
Apparatus according to claim 8 and also including: means for storing the input density values of the original at a first spatial resolution; and means for storing the threshold values of the desired screen dot arrangement in the form of analog functions.
Claim 14
Dependent Claim
46 words
Apparatus according to claim 8 and also comprising: means for storing the input density values of the original at a first spatial resolution; and means for storing the threshold values of the desired screen dot arrangement at a second spatial resolution different from the first resolution.
Claim 15
Dependent Claim
33 words
Apparatus according to claim 8 and wherein the spacing between adjacent lines in said x-y plane corresponds to the line to line spatial resolution of a plotter used for writing the screen dots.
Claim 16
Dependent Claim
49 words
Apparatus according to claim 11 and wherein the means for storing the threshold values of the desired screen dot for a given line in said x-y plane includes means for digitally storing the values at a third sampling resolution, which may be different from said first and second resolutions.
Claim 17
Dependent Claim
23 words
Apparatus according to claim 8 and wherein each said line in said x-y plane lies at an angle corresponding to a screening angle.
References Cited (Backward Citations)
US3916096A
Cited
US4040094A
Cited
US4149183A
Cited
US4456924A
Cited
GB2157119A
Cited
US4825298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-06 | 1995-07-08 | 1996-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-06 | 1999-07-08 | 2000-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-06 | 2003-07-08 | 2004-01-07 | $7700.00 | Window Closed / Lapsed |