DE69520703T2 - Erzeugung von Mehrfachtonbildern - Google Patents

Erzeugung von Mehrfachtonbildern

Info

Publication number
DE69520703T2
DE69520703T2 DE69520703T DE69520703T DE69520703T2 DE 69520703 T2 DE69520703 T2 DE 69520703T2 DE 69520703 T DE69520703 T DE 69520703T DE 69520703 T DE69520703 T DE 69520703T DE 69520703 T2 DE69520703 T2 DE 69520703T2
Authority
DE
Germany
Prior art keywords
generation
tone images
tone
images
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
Application number
DE69520703T
Other languages
English (en)
Other versions
DE69520703D1 (de
Inventor
Qian Lin
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.)
Hewlett Packard Development Co LP
Original Assignee
Hewlett Packard Co
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 Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of DE69520703D1 publication Critical patent/DE69520703D1/de
Application granted granted Critical
Publication of DE69520703T2 publication Critical patent/DE69520703T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • H04N1/40087—Multi-toning, i.e. converting a continuous-tone signal for reproduction with more than two discrete brightnesses or optical densities, e.g. dots of grey and black inks on white paper
    • 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
    • H04N1/4057—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 the pattern being a mixture of differently sized sub-patterns, e.g. spots having only a few different diameters
DE69520703T 1994-03-02 1995-02-16 Erzeugung von Mehrfachtonbildern Expired - Fee Related DE69520703T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US20567294A 1994-03-02 1994-03-02

Publications (2)

Publication Number Publication Date
DE69520703D1 DE69520703D1 (de) 2001-05-23
DE69520703T2 true DE69520703T2 (de) 2001-08-02

Family

ID=22763169

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69520703T Expired - Fee Related DE69520703T2 (de) 1994-03-02 1995-02-16 Erzeugung von Mehrfachtonbildern

Country Status (5)

Country Link
US (1) US5689586A (de)
EP (1) EP0670654B1 (de)
JP (1) JPH07283942A (de)
CN (1) CN1118745C (de)
DE (1) DE69520703T2 (de)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0670653B1 (de) 1994-03-02 2001-07-11 Hewlett-Packard Company, A Delaware Corporation Erzeugung von Mehrfachtonbildern
US6141121A (en) * 1995-03-02 2000-10-31 Apple Computer, Inc. Method and apparatus for color halftoning
US5751470A (en) * 1996-03-12 1998-05-12 Lexmark International, Inc. Method for enhanced print quality on print engines with at least one high resolution dimension
JP3156605B2 (ja) * 1996-11-19 2001-04-16 セイコーエプソン株式会社 トナー転写式の印刷装置のためのパルス幅データの生成装置及び方法
US6052203A (en) * 1996-11-19 2000-04-18 Seiko Epson Corporation Printing system, printer, printer driver and program storage medium
GB9626359D0 (en) * 1996-12-19 1997-02-05 Olivetti Telemedia Spa Method for encoding digital information
US6389175B1 (en) 1996-12-19 2002-05-14 At&T Laboratories, Limited Method for encoding digital information
US6717700B1 (en) 1999-07-01 2004-04-06 Xerox Corporation Method and system for adjusting binary images
EP1239660A1 (de) * 2001-03-09 2002-09-11 Agfa-Gevaert Ausreichende Quantisierung bei der Multipegelhalbtonerzeugung
US7170640B2 (en) 2001-03-09 2007-01-30 Agfa-Gevaert Adequate quantisation in multilevel halftoning
WO2003028362A1 (en) * 2001-09-21 2003-04-03 Ricoh Company, Ltd. Threshold value matrix creating method, image output system, storage medium, gradation reproducing method, threshold value matrix, image processing method, image processing apparatus, image forming apparatus and printer driver
US7212315B2 (en) * 2002-09-16 2007-05-01 Seiko Epson Corporation Mixed screen design for multi-mode document
JP2008544667A (ja) * 2005-06-24 2008-12-04 アグフア・グラフイクス・ナームローゼ・フエンノートシヤツプ 多数レベル周波数変調ハーフトーンスクリーンとその製法
EP1737211A1 (de) * 2005-06-24 2006-12-27 Agfa-Gevaert Mehrstufiges frequenzmoduliertes Halbtonraster und Verfahren zu dessen Herstellung
JP4549333B2 (ja) * 2005-11-01 2010-09-22 株式会社リコー ディザマトリクス、画像処理方法、プログラム、画像処理装置、画像形成装置及び画像形成システム
EP3013028A1 (de) * 2014-10-07 2016-04-27 OCE-Technologies B.V. Mehrstufiges halbtonmodul mit nichtgleichförmigkeitskompensation
WO2020027827A1 (en) 2018-08-01 2020-02-06 Hewlett-Packard Development Company, L.P. Covert marking
WO2020027825A1 (en) 2018-08-01 2020-02-06 Hewlett-Packard Development Company, L.P. Covert dot patterns

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1269093B (de) * 1962-11-20 1968-05-30 Basf Ag Verfahren zum Faerben und/oder Bedrucken von Textilmaterialien aus linearen Polyestern
DE1772367C3 (de) * 1968-05-04 1974-10-31 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren zur gerasterten Reproduktion von Halbtonbildern
US4455562A (en) * 1981-08-14 1984-06-19 Pitney Bowes Inc. Control of a light emitting diode array
JPS60240277A (ja) * 1984-05-15 1985-11-29 Fuji Xerox Co Ltd 中間調記録方法
JPS6125365A (ja) * 1984-07-13 1986-02-04 Canon Inc 中間調画像形成方法
DE3609252A1 (de) * 1985-03-20 1986-10-02 Canon K.K., Tokio/Tokyo Verfahren und vorrichtung zur bildreproduktion
US4974067A (en) * 1986-06-06 1990-11-27 Ricoh Company, Ltd. Multi-step-digital color image reproducing method and apparatus
US4680645A (en) * 1986-08-25 1987-07-14 Hewlett-Packard Company Method for rendering gray scale images with variable dot sizes
JPS63286351A (ja) * 1987-05-19 1988-11-24 Sony Corp プリンタ装置
JP2723941B2 (ja) * 1988-12-27 1998-03-09 株式会社白山製作所 多極の双方向半導体制御素子
DE69027870T2 (de) * 1989-02-10 1997-01-09 Canon Kk Bildverarbeitungsgerät
EP0421712B1 (de) * 1989-10-02 1997-05-14 Canon Kabushiki Kaisha Bilderzeugungsgerät und Modulationsverfahren
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
US5341224A (en) * 1992-04-17 1994-08-23 Xerox Corporation Image processing system and method for employing adaptive scanning of halftones to provide better printable images

Also Published As

Publication number Publication date
EP0670654A1 (de) 1995-09-06
US5689586A (en) 1997-11-18
DE69520703D1 (de) 2001-05-23
JPH07283942A (ja) 1995-10-27
CN1118898A (zh) 1996-03-20
EP0670654B1 (de) 2001-04-18
CN1118745C (zh) 2003-08-20

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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: HEWLETT-PACKARD DEVELOPMENT CO., L.P., HOUSTON, TE

8339 Ceased/non-payment of the annual fee