DE3777371D1 - Erzeugung von halbtonreproduktionen. - Google Patents

Erzeugung von halbtonreproduktionen.

Info

Publication number
DE3777371D1
DE3777371D1 DE8787309865T DE3777371T DE3777371D1 DE 3777371 D1 DE3777371 D1 DE 3777371D1 DE 8787309865 T DE8787309865 T DE 8787309865T DE 3777371 T DE3777371 T DE 3777371T DE 3777371 D1 DE3777371 D1 DE 3777371D1
Authority
DE
Germany
Prior art keywords
generation
halftone reproductions
reproductions
halftone
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 - Lifetime
Application number
DE8787309865T
Other languages
English (en)
Inventor
Malcolm David Mckinnon Roe
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.)
FFEI Ltd
Original Assignee
Crosfield Electronics Ltd
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 Crosfield Electronics Ltd filed Critical Crosfield Electronics Ltd
Application granted granted Critical
Publication of DE3777371D1 publication Critical patent/DE3777371D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Fax Reproducing Arrangements (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Laser Beam Printer (AREA)
DE8787309865T 1986-11-26 1987-11-06 Erzeugung von halbtonreproduktionen. Expired - Lifetime DE3777371D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB868628238A GB8628238D0 (en) 1986-11-26 1986-11-26 Generating half-tone representations

Publications (1)

Publication Number Publication Date
DE3777371D1 true DE3777371D1 (de) 1992-04-16

Family

ID=10607957

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8787309865T Expired - Lifetime DE3777371D1 (de) 1986-11-26 1987-11-06 Erzeugung von halbtonreproduktionen.

Country Status (5)

Country Link
US (1) US4821109A (de)
EP (1) EP0274196B1 (de)
JP (1) JPS63141445A (de)
DE (1) DE3777371D1 (de)
GB (1) GB8628238D0 (de)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8811568D0 (en) * 1988-05-16 1988-06-22 Crosfield Electronics Ltd Producing half-tone images
US4916530A (en) * 1988-09-02 1990-04-10 Itek Graphix Corp. High resolution halftone dot generator system including LED array
US4916545A (en) * 1988-11-16 1990-04-10 Eastman Kodak Company Electronic graphic arts screener that suppresses Moire patterns using pseudo-random font selection
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
US5278672A (en) * 1989-01-20 1994-01-11 Fuji Photo Film Co., Ltd. Image signal processing apparatus
US5225915A (en) * 1989-06-09 1993-07-06 Xerox Corporation Image processing with noise enhancing operators for moire reduction and/or random dot generation
WO1991002426A2 (en) * 1989-08-04 1991-02-21 Intergraph Corporation Rapid variable angle digital screening
US4945422A (en) * 1990-01-02 1990-07-31 Eastman Kodak Company False density contour suppression using stored random probabilities to form print/no-print decisions
US4959730A (en) * 1990-01-02 1990-09-25 Eastman Kodak Company False density contour suppression using randomly modified input signals for comparison to threshold values
GB2249910B (en) * 1990-11-19 1994-11-30 Le Proizv Ob Poligraficheskogo Method of and apparatus for making a half-tone reproduction of an image
US5276535A (en) * 1991-12-24 1994-01-04 Levien Raphael L Method and apparatus for halftoning of images using grayscale error diffusion
US5331429A (en) * 1992-02-07 1994-07-19 Levien Raphael L Digital generation of halftone images with error diffusion and frequency matched periodic screen rulings
JPH0845246A (ja) * 1994-07-29 1996-02-16 Sony Corp 記録媒体、再生方法、記録装置、及び再生装置
US5689623A (en) * 1995-03-27 1997-11-18 Optronics International Corporation Spread spectrum digital screening
US5937109A (en) * 1996-11-01 1999-08-10 Xerox Corporation Automoire phase error correction for a hyperacuity halftoner
US8031363B2 (en) * 2003-03-31 2011-10-04 Electronics For Imaging, Inc. Methods and apparatus for dynamically soft proofing halftone images
US7733532B2 (en) * 2004-10-27 2010-06-08 Marvell International Technology Ltd. Laser print apparatus with dual halftones
JP2014094256A (ja) * 2012-11-08 2014-05-22 Angel Playing Cards Co Ltd テーブルゲームシステム

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1218015A (en) * 1967-03-13 1971-01-06 Nat Res Dev Improvements in or relating to systems for transmitting television signals
DE1772367C3 (de) * 1968-05-04 1974-10-31 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren zur gerasterten Reproduktion von Halbtonbildern
GB1448112A (en) * 1973-02-13 1976-09-02 Int Publishing Corp Ltd Electronic screening
US4040094A (en) * 1973-02-13 1977-08-02 International Publishing Corporation Ltd. Electronic screening
DE2827596C2 (de) * 1978-06-23 1984-11-22 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren und Anordnung zur Herstellung gerasterter Druckformen
US4196454A (en) * 1978-12-04 1980-04-01 Xerox Corporation Tone error control for relatively large image areas
JPS57120937A (en) * 1981-01-21 1982-07-28 Dainippon Screen Mfg Co Ltd Formation of halftone plate image
JPS57160264A (en) * 1981-03-30 1982-10-02 Canon Inc Recorder of half tone picture
JPS57193173A (en) * 1981-05-22 1982-11-27 Fuji Photo Film Co Ltd Picture scanning and recording method
DE3373764D1 (en) * 1983-11-14 1987-10-22 Hell Rudolf Dr Ing Gmbh Method and apparatus for manufacturing screened printing forms
US4727434A (en) * 1984-03-14 1988-02-23 Canon Kabushiki Kaisha Image processing apparatus for rapid production of a hard copy of a video image in which input image signal processing parameters are set while a record medium is being positioned at a recording position
JPS6163893A (ja) * 1984-09-06 1986-04-02 株式会社日立製作所 デイスプレイ装置における擬似中間調画像の表示方法
JPS6191772A (ja) * 1984-10-11 1986-05-09 Canon Inc 画像処理装置

Also Published As

Publication number Publication date
US4821109A (en) 1989-04-11
GB8628238D0 (en) 1986-12-31
EP0274196A1 (de) 1988-07-13
JPS63141445A (ja) 1988-06-13
EP0274196B1 (de) 1992-03-11

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: FUJIFILM ELECTRONIC IMAGING LTD., LONDON, GB

8320 Willingness to grant licences declared (paragraph 23)
8339 Ceased/non-payment of the annual fee