DE69308632D1 - Verbessertes Verfahren zur frequenzmodulierten Halbtonrasterung - Google Patents
Verbessertes Verfahren zur frequenzmodulierten HalbtonrasterungInfo
- Publication number
- DE69308632D1 DE69308632D1 DE69308632T DE69308632T DE69308632D1 DE 69308632 D1 DE69308632 D1 DE 69308632D1 DE 69308632 T DE69308632 T DE 69308632T DE 69308632 T DE69308632 T DE 69308632T DE 69308632 D1 DE69308632 D1 DE 69308632D1
- Authority
- DE
- Germany
- Prior art keywords
- value
- image pixel
- unprocessed image
- unprocessed
- tone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
- H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
- H04N1/4051—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a dispersed dots halftone pattern, the dots having substantially the same size
- H04N1/4052—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a dispersed dots halftone pattern, the dots having substantially the same size by error diffusion, i.e. transferring the binarising error to neighbouring dot decisions
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Image Signal Circuits (AREA)
- Facsimiles In General (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Image Processing (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69308632T DE69308632T2 (de) | 1992-05-22 | 1993-04-16 | Verbessertes Verfahren zur frequenzmodulierten Halbtonrasterung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4216931 | 1992-05-22 | ||
DE69308632T DE69308632T2 (de) | 1992-05-22 | 1993-04-16 | Verbessertes Verfahren zur frequenzmodulierten Halbtonrasterung |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69308632D1 true DE69308632D1 (de) | 1997-04-17 |
DE69308632T2 DE69308632T2 (de) | 1997-10-02 |
Family
ID=6459474
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69308632T Expired - Fee Related DE69308632T2 (de) | 1992-05-22 | 1993-04-16 | Verbessertes Verfahren zur frequenzmodulierten Halbtonrasterung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0571010B1 (de) |
AT (1) | ATE150245T1 (de) |
DE (1) | DE69308632T2 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69303810T2 (de) * | 1993-04-16 | 1997-02-20 | Agfa Gevaert Nv | Verfahren zur Herstellung lithographischer Druckformen |
ATE140835T1 (de) * | 1993-04-16 | 1996-08-15 | Agfa Gevaert Nv | Verfahren zur herstellung lithographischer druckformen |
EP0620677A1 (de) * | 1993-04-16 | 1994-10-19 | Agfa-Gevaert N.V. | Frequenzmoduliertes Halbtonraster und Verfahren zu dessen Herstellung |
EP0691577A1 (de) * | 1994-07-06 | 1996-01-10 | Agfa-Gevaert N.V. | Verfahren zur Herstellung einer lithographischer Druckplatte |
EP0773113B1 (de) | 1995-11-09 | 2000-05-24 | Agfa-Gevaert N.V. | Wärmeempfindliches Aufzeichnungselement und Verfahren zur Herstellung einer lithographischen Druckform damit |
EP0773112B1 (de) | 1995-11-09 | 2001-05-30 | Agfa-Gevaert N.V. | Wärmeempfindliches Aufzeichnungselement und Verfahren zur Herstellung einer Druckform damit |
DE19745498C2 (de) * | 1997-10-15 | 2000-12-07 | Agfa Gevaert Ag | Verfahren und Vorrichtung zum Kopieren einer transparenten Vorlage auf lichtempfindliches Material |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2432478B1 (de) | 1978-07-31 | 1982-03-12 | Quartz & Silice | |
US4456924A (en) | 1980-04-14 | 1984-06-26 | Scitex Corporation Ltd. | Screened image reproduction |
US4350996A (en) | 1980-04-14 | 1982-09-21 | Scitex Corporation Ltd. | Screened image reproduction |
DE3176685D1 (en) | 1980-09-01 | 1988-04-21 | Crosfield Electronics Ltd | A method of producing a half-tone reproduction |
EP0056829B1 (de) | 1981-01-24 | 1985-09-04 | DR.-ING. RUDOLF HELL GmbH | Farbdriftfreie Raster für den Mehrfarbendruck |
US4499489A (en) | 1981-06-08 | 1985-02-12 | Dr. Ing. Rudolf Hell Gmbh | Production of screen printing blocks |
ATE14164T1 (de) | 1981-09-12 | 1985-07-15 | Hell Rudolf Dr Ing Gmbh | Verfahren zur herstellung von druckformen mittels unregelmaessig verteilter druckpunkte. |
DE3175911D1 (en) | 1981-11-20 | 1987-03-12 | Hell Rudolf Dr Ing Gmbh | Screen system for multicolour printing |
EP0141869B1 (de) | 1983-11-14 | 1987-09-16 | DR.-ING. RUDOLF HELL GmbH | Verfahren und Einrichtung zur Herstellung gerasterter Druckformen |
US5150429A (en) | 1987-12-17 | 1992-09-22 | Eastman Kodak Company | Image processor with error diffusion modulated threshold matrix |
US4920501A (en) | 1988-10-19 | 1990-04-24 | Eastman Kodak Company | Digital halftoning with minimum visual modulation patterns |
US4924301A (en) | 1988-11-08 | 1990-05-08 | Seecolor Corporation | Apparatus and methods for digital halftoning |
US4918622A (en) | 1988-11-16 | 1990-04-17 | Eastman Kodak Company | Electronic graphic arts screener |
JPH0666880B2 (ja) | 1988-11-17 | 1994-08-24 | 大日本スクリーン製造株式会社 | 網目版画像形成方法 |
JPH03131173A (ja) | 1989-10-17 | 1991-06-04 | Canon Inc | 画像処理方式 |
US5130821A (en) | 1990-04-16 | 1992-07-14 | Eastman Kodak Company | Method and apparatus for digital halftoning employing density distribution for selection of a threshold template |
JP2517793B2 (ja) | 1990-11-28 | 1996-07-24 | 大日本スクリーン製造株式会社 | 網目版画像形成方法 |
US5111310A (en) | 1990-12-04 | 1992-05-05 | Research Technologies Corporation, Inc. | Method and apparatus for halftone rendering of a gray scale image using a blue noise mask |
US5202772A (en) | 1991-02-28 | 1993-04-13 | Volt Information Sciences, Inc. | Color halftone screen utilizing preselected halftone dots placed at preselected distance and screen angles from center halftone dots |
US5150428A (en) | 1991-04-01 | 1992-09-22 | Eastman Kodak Company | Method for generating halftone image data with randomly selected threshold array |
US5130823A (en) | 1991-06-27 | 1992-07-14 | Cactus | Error diffusion system |
US5155599A (en) | 1991-07-25 | 1992-10-13 | Miles, Inc. | Screening system and method for color reproduction in offset printing |
-
1993
- 1993-04-16 DE DE69308632T patent/DE69308632T2/de not_active Expired - Fee Related
- 1993-04-16 EP EP93201113A patent/EP0571010B1/de not_active Expired - Lifetime
- 1993-04-16 AT AT93201113T patent/ATE150245T1/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP0571010B1 (de) | 1997-03-12 |
EP0571010A1 (de) | 1993-11-24 |
ATE150245T1 (de) | 1997-03-15 |
DE69308632T2 (de) | 1997-10-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8320 | Willingness to grant licences declared (paragraph 23) | ||
8339 | Ceased/non-payment of the annual fee |