GB2026283B - Production of half tone facsimile separations with optional screen angles - Google Patents

Production of half tone facsimile separations with optional screen angles

Info

Publication number
GB2026283B
GB2026283B GB7922085A GB7922085A GB2026283B GB 2026283 B GB2026283 B GB 2026283B GB 7922085 A GB7922085 A GB 7922085A GB 7922085 A GB7922085 A GB 7922085A GB 2026283 B GB2026283 B GB 2026283B
Authority
GB
United Kingdom
Prior art keywords
separations
production
half tone
screen angles
optional screen
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
Application number
GB7922085A
Other languages
English (en)
Other versions
GB2026283A (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HELL R ING GmbH
Original Assignee
HELL R ING GmbH
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 HELL R ING GmbH filed Critical HELL R ING GmbH
Publication of GB2026283A publication Critical patent/GB2026283A/en
Application granted granted Critical
Publication of GB2026283B publication Critical patent/GB2026283B/en
Expired legal-status Critical Current

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
    • H04N1/4055—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern
    • H04N1/4058—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern with details for producing a halftone screen at an oblique angle
    • 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
    • H04N1/46—Colour picture communication systems
    • H04N1/52—Circuits or arrangements for halftone screening

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Image Processing (AREA)
  • Color Image Communication Systems (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Screen Printers (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
GB7922085A 1978-06-23 1979-06-25 Production of half tone facsimile separations with optional screen angles Expired GB2026283B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2827596A DE2827596C2 (de) 1978-06-23 1978-06-23 Verfahren und Anordnung zur Herstellung gerasterter Druckformen

Publications (2)

Publication Number Publication Date
GB2026283A GB2026283A (en) 1980-01-30
GB2026283B true GB2026283B (en) 1983-01-06

Family

ID=6042572

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7922085A Expired GB2026283B (en) 1978-06-23 1979-06-25 Production of half tone facsimile separations with optional screen angles

Country Status (14)

Country Link
JP (1) JPS556393A (es)
AU (1) AU529655B2 (es)
CA (1) CA1127090A (es)
CH (1) CH643373A5 (es)
DD (1) DD144468A5 (es)
DE (1) DE2827596C2 (es)
ES (1) ES481815A1 (es)
FR (1) FR2429455A1 (es)
GB (1) GB2026283B (es)
IL (1) IL57630A (es)
IT (1) IT1121443B (es)
NL (1) NL182986C (es)
SE (1) SE435107B (es)
SU (1) SU1463125A3 (es)

Families Citing this family (61)

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DE3176685D1 (en) * 1980-09-01 1988-04-21 Crosfield Electronics Ltd A method of producing a half-tone reproduction
JPS57120937A (en) * 1981-01-21 1982-07-28 Dainippon Screen Mfg Co Ltd Formation of halftone plate image
JPS57171337A (en) * 1981-04-14 1982-10-21 Dainippon Screen Mfg Co Ltd Production of halftone plate picture
US4499489A (en) * 1981-06-08 1985-02-12 Dr. Ing. Rudolf Hell Gmbh Production of screen printing blocks
JPS5880639A (ja) * 1981-11-07 1983-05-14 Dainippon Screen Mfg Co Ltd 網目版画像の記録方法
ATE25434T1 (de) * 1981-11-20 1987-02-15 Hell Rudolf Dr Ing Gmbh Rastersystem fuer den mehrfarbendruck.
US5666444A (en) * 1982-04-06 1997-09-09 Canon Kabushiki Kaisha Image processing apparatus
DE3312273C3 (de) * 1982-04-06 1996-03-21 Canon Kk Bildverarbeitungsgerät
JPS58182372A (ja) * 1982-04-20 1983-10-25 Canon Inc プリンタスクリ−ン角設定方法
JPS59122080A (ja) * 1982-12-27 1984-07-14 Leo Giken:Kk 網点画像の発生方法
JPS59161981A (ja) * 1983-03-06 1984-09-12 Canon Inc 画像処理装置
GB8318835D0 (en) * 1983-07-12 1983-08-10 Crosfield Electronics Ltd Half-tone image reproducing
EP0141869B1 (de) * 1983-11-14 1987-09-16 DR.-ING. RUDOLF HELL GmbH Verfahren und Einrichtung zur Herstellung gerasterter Druckformen
JPS60213170A (ja) * 1984-04-06 1985-10-25 Dainippon Screen Mfg Co Ltd 画像走査記録装置における網点パタ−ン発生方法
AT381401B (de) * 1984-06-04 1986-10-10 Weidinger Wolfgang Verfahren zur herstellung von rasterfarbauszuegen und deren weiterverarbeitung auf eine flexodruckform
JPH0657049B2 (ja) * 1984-12-07 1994-07-27 大日本スクリ−ン製造株式会社 網点形成方法
JPH0614187B2 (ja) * 1984-10-11 1994-02-23 株式会社デイ・エス・スキヤナ− 網点フィルム作成装置
DE3614790A1 (de) * 1986-05-02 1987-11-05 Hell Rudolf Dr Ing Gmbh Verfahren und einrichtung zur elektronischen seitenkombination fuer die reproduktionstechnik
GB8628238D0 (en) * 1986-11-26 1986-12-31 Crosfield Electronics Ltd Generating half-tone representations
JPS6444681A (en) * 1987-08-12 1989-02-17 Fuji Photo Film Co Ltd Dot screen forming method
DE3738014A1 (de) * 1987-11-09 1989-05-18 Winrich Dipl Ing Gall Verfahren zur erzeugung farbiger bilder auf einer traegerflaeche
JPH022042A (ja) * 1987-12-18 1990-01-08 Contex Graphic Syst Inc 中間色印字システム
JPH01228848A (ja) * 1988-03-10 1989-09-12 Canon Inc 画像形成装置
EP0585961A1 (en) * 1988-05-18 1994-03-09 Fuji Photo Film Co., Ltd. A light beam scanning apparatus for forming a halftone screen
US5172248A (en) * 1988-05-18 1992-12-15 Fuji Photo Film Co., Ltd. Method for forming halftone screen and apparatus therefor
US4916530A (en) * 1988-09-02 1990-04-10 Itek Graphix Corp. High resolution halftone dot generator system including LED array
US4924301A (en) * 1988-11-08 1990-05-08 Seecolor Corporation Apparatus and methods for digital halftoning
JPH0691620B2 (ja) * 1988-11-15 1994-11-14 大日本スクリーン製造株式会社 カラー画像の網目版画像記録方法
US4977458A (en) * 1988-11-16 1990-12-11 Eastman Kodak Company Apparatus for addressing a font to suppress Moire patterns occurring thereby and a method for use therein
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
US5053887A (en) * 1989-06-27 1991-10-01 Ibm Corporation Technique for producing a fine grained dithered halftone image having an increased number of gray levels
DE69031771T2 (de) * 1989-09-20 1998-06-18 Toyo Ink Mfg Co Farbbildinformationsverarbeitungsverfahren
EP0711067A3 (en) * 1989-11-21 1996-07-10 Toyo Ink Mfg Co Process for the formation of density patterns for the reproduction of binary gradations
EP0454277B1 (en) * 1990-04-25 1996-07-03 Bayer Corporation Method for breaking-up symmetry of matrix elements in an electronic half-tone screening processs
JP2598723B2 (ja) * 1990-06-28 1997-04-09 大日本スクリーン製造株式会社 網点画像作成装置
US5258832A (en) * 1990-09-14 1993-11-02 Minnesota Mining And Manufacturing Company Non-perpendicular, unequal frequency non-conventional screen patterns for electronic halftone generation
US5583660A (en) * 1990-09-14 1996-12-10 Minnesota Mining And Manufacturing Company Non-perpendicular, equal frequency non-conventional screen patterns for electronic halftone generation
US5253084A (en) * 1990-09-14 1993-10-12 Minnesota Mining And Manufacturing Company General kernel function for electronic halftone generation
US5323245A (en) * 1990-09-14 1994-06-21 Minnesota Mining And Manufacturing Company Perpendicular, unequal frequency non-conventional screen patterns for electronic halftone generation
US5264926A (en) * 1990-09-14 1993-11-23 Minnesota Mining And Manufacturing Company Perpendicular, equal frequency non-conventional screen patterns for electronic halftone generation
US5221971A (en) * 1990-11-21 1993-06-22 Polaroid Corporation Area modulation printing apparatus
EP0740458B1 (en) * 1991-02-08 2002-06-19 Adobe Systems Inc. Method of controlling dot size in digital halftoning with multi-cell threshold arrays
DE4107703C2 (de) * 1991-03-09 1994-07-21 Hell Ag Linotype Verfahren und Vorrichtung zur Aufzeichnung gerasterter Bilder
DE4108253C2 (de) * 1991-03-14 1995-04-27 Hell Ag Linotype Verfahren und Anordnung zur Herstellung von gerasterten Farbauszügen und Druckformen
JPH077624A (ja) * 1991-09-09 1995-01-10 Mitsubishi Paper Mills Ltd 網点画像記録方法
DE4205085A1 (de) * 1992-02-17 1993-08-26 Mannesmann Ag Verfahren und schaltung zum erzeugen von bild-informationen (pixmaps)
JP2759186B2 (ja) * 1992-10-21 1998-05-28 大日本スクリーン製造株式会社 多色網目版画像作成方法
EP0631430A3 (en) * 1993-06-22 1995-02-22 Nippon Electric Co Color image processing device for removing moiré.
EP0680193B1 (en) * 1994-04-27 2000-07-12 Agfa-Gevaert N.V. Tone dependent rosette structures in multi layer screening by phase modulation
US6117334A (en) * 1995-01-10 2000-09-12 Coury; William S. Decontamination reactor system and method of using same
US6361697B1 (en) 1995-01-10 2002-03-26 William S. Coury Decontamination reactor system and method of using same
JPH08227147A (ja) * 1995-02-21 1996-09-03 Dainippon Screen Mfg Co Ltd 網点作成方法および装置
DE19722697A1 (de) * 1997-05-30 1998-12-03 Heidelberger Druckmasch Ag Verfahren zur digitalen Rasterung von Halbtonbildern mit Rastern beliebiger Rasterweiten und Rasterwinkel
DE10022225B4 (de) * 2000-05-08 2015-12-17 Heidelberger Druckmaschinen Ag Mehrstufen-Rasterung mit Rastern beliebiger Rasterweiten und Rasterwinkel
JP2002356008A (ja) * 2001-02-02 2002-12-10 Ricoh Co Ltd 画像形成装置及び方法
EP1286533B1 (en) 2001-03-14 2011-09-14 Ricoh Company, Ltd. Light-emission modulation having effective scheme of creating gray scale on image
DE10261004B4 (de) * 2002-12-24 2009-03-26 Heidelberger Druckmaschinen Ag Verfahren zur Anwendung von Zufallszahlen bei der Rasterung von Bilddaten
DE502007005952D1 (de) * 2007-06-06 2011-01-27 Weidlich Ernst Rudolf Gottfried Verfahren zum Gravieren einer Druckform mittels Laserlicht
JP2009218736A (ja) 2008-03-07 2009-09-24 Canon Inc 画像形成装置及び画像形成方法
DE102009042374A1 (de) 2008-10-20 2010-04-22 Heidelberger Druckmaschinen Ag Verfahren zur digitalen Rasterung von Halbtonbildern

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2012728C3 (de) * 1970-03-18 1974-09-19 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren zur elektrooptischen Aufzeichnung von gerasterten Halbtonbildern
US4084183A (en) * 1970-03-18 1978-04-11 Dr. Ing. Rudolf Hell Gmbh. Method for the electro-optical reproduction of half-tone pictures
US3911480A (en) * 1972-12-08 1975-10-07 John P Brucker Generating screened half-tones by scanning
JPS5340292B2 (es) * 1973-08-31 1978-10-26
GB1495499A (en) * 1974-01-30 1977-12-21 Crosfield Electronics Ltd Image reproduction systems
DE2646926B2 (de) * 1976-10-18 1979-03-29 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren zur Änderung der bildpunktmäBigen Zerlegung von Halbtonbildern beim Übergang von der Reproduktion zur Aufzeichnung

Also Published As

Publication number Publication date
IT7923661A0 (it) 1979-06-18
DE2827596A1 (de) 1980-02-07
GB2026283A (en) 1980-01-30
AU529655B2 (en) 1983-06-16
ES481815A1 (es) 1980-07-01
DE2827596C2 (de) 1984-11-22
NL7904904A (nl) 1979-12-28
AU4831179A (en) 1980-01-03
IL57630A0 (en) 1979-10-31
CH643373A5 (de) 1984-05-30
JPH0335867B2 (es) 1991-05-29
NL182986B (nl) 1988-01-18
SE435107B (sv) 1984-09-03
IT1121443B (it) 1986-04-02
FR2429455B1 (es) 1984-10-19
JPS556393A (en) 1980-01-17
SE7905507L (sv) 1979-12-24
CA1127090A (en) 1982-07-06
NL182986C (nl) 1988-06-16
IL57630A (en) 1982-03-31
SU1463125A3 (ru) 1989-02-28
DD144468A5 (de) 1980-10-15
FR2429455A1 (fr) 1980-01-18

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19990624