ATE150245T1 - Verbessertes verfahren zur frequenzmodulierten halbtonrasterung - Google Patents

Verbessertes verfahren zur frequenzmodulierten halbtonrasterung

Info

Publication number
ATE150245T1
ATE150245T1 AT93201113T AT93201113T ATE150245T1 AT E150245 T1 ATE150245 T1 AT E150245T1 AT 93201113 T AT93201113 T AT 93201113T AT 93201113 T AT93201113 T AT 93201113T AT E150245 T1 ATE150245 T1 AT E150245T1
Authority
AT
Austria
Prior art keywords
value
image pixel
unprocessed image
unprocessed
tone
Prior art date
Application number
AT93201113T
Other languages
English (en)
Inventor
Klaus Balser
Jean Fischer
Paul Delabastita
Original Assignee
Agfa Gevaert Nv
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Agfa Gevaert Nv filed Critical Agfa Gevaert Nv
Application granted granted Critical
Publication of ATE150245T1 publication Critical patent/ATE150245T1/de

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)
AT93201113T 1992-05-22 1993-04-16 Verbessertes verfahren zur frequenzmodulierten halbtonrasterung ATE150245T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4216931 1992-05-22

Publications (1)

Publication Number Publication Date
ATE150245T1 true ATE150245T1 (de) 1997-03-15

Family

ID=6459474

Family Applications (1)

Application Number Title Priority Date Filing Date
AT93201113T ATE150245T1 (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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE140836T1 (de) * 1993-04-16 1996-08-15 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
EP0773112B1 (de) 1995-11-09 2001-05-30 Agfa-Gevaert N.V. Wärmeempfindliches Aufzeichnungselement und Verfahren zur Herstellung einer Druckform damit
EP0773113B1 (de) 1995-11-09 2000-05-24 Agfa-Gevaert N.V. Wärmeempfindliches Aufzeichnungselement und Verfahren zur Herstellung einer lithographischen 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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2432478B1 (de) 1978-07-31 1982-03-12 Quartz & Silice
US4350996A (en) 1980-04-14 1982-09-21 Scitex Corporation Ltd. Screened image reproduction
US4456924A (en) 1980-04-14 1984-06-26 Scitex Corporation Ltd. Screened image reproduction
EP0047145B1 (de) 1980-09-01 1988-03-16 Crosfield Electronics Limited Verfahren zum Erzeugen einer Halbtonreproduktion
DE3172094D1 (en) 1981-01-24 1985-10-10 Hell Rudolf Dr Ing Gmbh Screens for multicolour printing without colour drift
US4499489A (en) 1981-06-08 1985-02-12 Dr. Ing. Rudolf Hell Gmbh Production of screen printing blocks
DE3171227D1 (en) 1981-09-12 1985-08-08 Hell Rudolf Dr Ing Gmbh Method for the production of printing plates by means of printing irregularly distributed points
EP0079974B1 (de) 1981-11-20 1987-02-04 DR.-ING. RUDOLF HELL GmbH Rastersystem für den Mehrfarbendruck
ATE29815T1 (de) 1983-11-14 1987-10-15 Hell Rudolf Dr Ing 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

Also Published As

Publication number Publication date
EP0571010B1 (de) 1997-03-12
DE69308632D1 (de) 1997-04-17
EP0571010A1 (de) 1993-11-24
DE69308632T2 (de) 1997-10-02

Similar Documents

Publication Publication Date Title
US5072291A (en) Image information signal processing apparatus for improving reproduced image quality by discriminating the type of input image and selecting a particular processing in accordance therewith
US4668995A (en) System for reproducing mixed images
JPS61267791A (ja) ヒストグラム解析を用いた図形像の閾値処理方法及びその装置
EP0223601A2 (de) Bildverarbeitungsverfahren
EP0781034B1 (de) Bildverarbeitungsgerät und -verfahren
ATE150245T1 (de) Verbessertes verfahren zur frequenzmodulierten halbtonrasterung
DE3676894D1 (de) Verfahren zum vergroessern/verkleinern von halbtonbildern.
EP0810773A3 (de) Verfahren und System zur Bildverarbeitung durch hybride Fehlerdiffusion
AU557905B2 (en) Contrast accentuation
JPH02210962A (ja) 画像処理装置
US7327898B2 (en) Reducing boundary effects for images with screen patterns
JPS62256573A (ja) 画像処理装置
JPH01222575A (ja) 画像信号の２値化回路
JPH0550187B2 (de)
JPS60136476A (ja) 画像処理装置
JPS63214073A (ja) 画像処理方法
JPH01137378A (ja) 画像処理方式
DE3844828C2 (de) Faksimilegerät
KR100490244B1 (ko) 화상처리 시스템의 임계값에 의한 오차 확산방법
JPH02210961A (ja) 画像処理装置
JPH0197650A (ja) 画像処理方法
JPS5944174A (ja) 中間調再現方法
JPH0691605B2 (ja) 画像処理装置
JPH0423677A (ja) 画像処理装置
JPS63214079A (ja) 画像処理方法

Legal Events

Date Code Title Description
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties