GB1355540A - Methods of and apparatus for reproducing pictures - Google Patents

Methods of and apparatus for reproducing pictures

Info

Publication number
GB1355540A
GB1355540A GB2427171A GB2427171A GB1355540A GB 1355540 A GB1355540 A GB 1355540A GB 2427171 A GB2427171 A GB 2427171A GB 2427171 A GB2427171 A GB 2427171A GB 1355540 A GB1355540 A GB 1355540A
Authority
GB
United Kingdom
Prior art keywords
tone
scanned
original
sub
areas
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
GB2427171A
Other languages
English (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.)
Dr Ing Rudolf Hell GmbH
Original Assignee
Dr Ing Rudolf Hell 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 Dr Ing Rudolf Hell GmbH filed Critical Dr Ing Rudolf Hell GmbH
Publication of GB1355540A publication Critical patent/GB1355540A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Color, Gradation (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
GB2427171A 1970-03-18 1971-04-19 Methods of and apparatus for reproducing pictures Expired GB1355540A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702012728 DE2012728C3 (de) 1970-03-18 1970-03-18 Verfahren zur elektrooptischen Aufzeichnung von gerasterten Halbtonbildern

Publications (1)

Publication Number Publication Date
GB1355540A true GB1355540A (en) 1974-06-05

Family

ID=5765374

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2427171A Expired GB1355540A (en) 1970-03-18 1971-04-19 Methods of and apparatus for reproducing pictures

Country Status (5)

Country Link
JP (1) JPS535561B1 (enExample)
DE (1) DE2012728C3 (enExample)
FR (1) FR2084832A5 (enExample)
GB (1) GB1355540A (enExample)
SU (1) SU682160A3 (enExample)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120896A (en) * 1982-04-06 1983-12-07 Canon Kk Half-tone facsimile system
US5666444A (en) * 1982-04-06 1997-09-09 Canon Kabushiki Kaisha Image processing apparatus
WO2000056062A1 (en) * 1999-03-16 2000-09-21 Megadot Systems Limited Improvements relating to halftone patterns

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3983319A (en) * 1973-11-12 1976-09-28 Printing Developments, Inc. Electronic screening for image reproduction
US4189752A (en) * 1973-11-12 1980-02-19 Printing Developments, Inc. Electronic screening with galvanometer recorders
JPS51150401A (en) * 1975-06-18 1976-12-24 Dainippon Screen Mfg Method and device for scanning recording screen printed image
DE2646925B2 (de) * 1976-10-18 1978-10-05 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren zur Gewinnung von digitalen Aufzeichnungsdaten für gerasterte Farbauszüge
DE2752164C3 (de) * 1977-11-23 1980-11-20 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Gerasterte fotomechanische Druckformherstellung
DE2805874C3 (de) * 1978-02-11 1987-04-16 Thomas E. Fausel Verfahren zum Herstellen einer Tiefdruckform
DE2827596C2 (de) * 1978-06-23 1984-11-22 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren und Anordnung zur Herstellung gerasterter Druckformen
JPS5880639A (ja) * 1981-11-07 1983-05-14 Dainippon Screen Mfg Co Ltd 網目版画像の記録方法
EP0079974B1 (de) * 1981-11-20 1987-02-04 DR.-ING. RUDOLF HELL GmbH Rastersystem für den Mehrfarbendruck
JPH0683374B2 (ja) * 1986-02-14 1994-10-19 富士写真フイルム株式会社 網点画像の形成方法
DE4038056C2 (de) * 1990-11-29 1997-05-15 Hell Ag Linotype Verfahren zur Generierung und Speicherung von digitalisierten Dichteschwellwerten zur Rasterung einer Halbton-Bildvorlage
DE4038057C2 (de) * 1990-11-29 1997-05-15 Hell Ag Linotype Verfahren zur Generierung und Speicherung von digitalisierten Dichteschwellwerten zur Rasterung einer Halbtonbildvorlage
JP4100157B2 (ja) 2002-12-09 2008-06-11 富士ゼロックス株式会社 画像形成装置及び方法

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120896A (en) * 1982-04-06 1983-12-07 Canon Kk Half-tone facsimile system
GB2163318A (en) * 1982-04-06 1986-02-19 Canon Kk Half-tone facsimile system
US4783837A (en) * 1982-04-06 1988-11-08 Canon Kabushiki Kaisha Image processing apparatus
US5666444A (en) * 1982-04-06 1997-09-09 Canon Kabushiki Kaisha Image processing apparatus
WO2000056062A1 (en) * 1999-03-16 2000-09-21 Megadot Systems Limited Improvements relating to halftone patterns
US7268920B1 (en) * 1999-03-16 2007-09-11 Megadot Systems Limited Halftone patterns
USRE41604E1 (en) * 1999-03-16 2010-08-31 Megadot Systems Limited Halftone patterns

Also Published As

Publication number Publication date
SU682160A3 (ru) 1979-08-25
DE2012728C3 (de) 1974-09-19
FR2084832A5 (enExample) 1971-12-17
JPS535561B1 (enExample) 1978-02-28
DE2012728B2 (de) 1974-02-28
DE2012728A1 (de) 1971-09-30

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years