DE69521638D1 - Erzeugung von Mehrfachtonbildern - Google Patents

Erzeugung von Mehrfachtonbildern

Info

Publication number
DE69521638D1
DE69521638D1 DE69521638T DE69521638T DE69521638D1 DE 69521638 D1 DE69521638 D1 DE 69521638D1 DE 69521638 T DE69521638 T DE 69521638T DE 69521638 T DE69521638 T DE 69521638T DE 69521638 D1 DE69521638 D1 DE 69521638D1
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
DE69521638T
Other languages
English (en)
Other versions
DE69521638T2 (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 DE69521638D1 publication Critical patent/DE69521638D1/de
Application granted granted Critical
Publication of DE69521638T2 publication Critical patent/DE69521638T2/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
    • H04N1/405—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Image Processing (AREA)
  • Color, Gradation (AREA)
DE69521638T 1994-03-02 1995-02-16 Erzeugung von Mehrfachtonbildern Expired - Fee Related DE69521638T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US20521594A 1994-03-02 1994-03-02

Publications (2)

Publication Number Publication Date
DE69521638D1 true DE69521638D1 (de) 2001-08-16
DE69521638T2 DE69521638T2 (de) 2001-10-25

Family

ID=22761295

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69521638T Expired - Fee Related DE69521638T2 (de) 1994-03-02 1995-02-16 Erzeugung von Mehrfachtonbildern

Country Status (5)

Country Link
US (1) US5615021A (de)
EP (1) EP0670653B1 (de)
JP (1) JPH07283943A (de)
CN (1) CN1085000C (de)
DE (1) DE69521638T2 (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69527675T2 (de) * 1994-04-27 2003-04-03 Agfa-Gevaert, Mortsel Mehrstufige Halbtonrasterung mit gruppierten Punkten und Linien für den elektrografischen Farbdruck
US5768425A (en) * 1995-07-14 1998-06-16 Texas Instruments Incorporated Method and system for improved threshold based screening
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
JP4348748B2 (ja) * 1996-07-18 2009-10-21 セイコーエプソン株式会社 印刷装置および画像記録方法
US5966507A (en) * 1997-08-25 1999-10-12 Hewlett-Packard Company Image resolution enhancement technology (IRET) for dual dye-load inkjet printer
US6643032B1 (en) * 1998-12-28 2003-11-04 Xerox Corporation Marking engine and method to optimize tone levels in a digital output system
US6264300B1 (en) * 1999-06-04 2001-07-24 Lexmark International, Inc. Methods of printing with an ink jet printer using inks with same hue and different saturation
US6778299B2 (en) 2001-03-09 2004-08-17 Hewlett-Packard Development Company, L.P. Error diffusion with partial dots method and system
CN100435548C (zh) * 2006-09-15 2008-11-19 北京大学 一种能够同时产生多位调频网点的方法及装置
EP2123017A1 (de) * 2007-03-02 2009-11-25 Marvell World Trade Ltd Dynamisches bild-dithering
JP4549418B2 (ja) * 2008-03-04 2010-09-22 シャープ株式会社 画像処理装置、画像処理方法、画像形成装置、並びに、プログラム、記録媒体
EP3461116B1 (de) * 2017-09-23 2024-04-17 Heidelberg Polska Sp. z o.o. Verfahren und system für am-screening und -schutz von druckausgaben
US12075016B1 (en) * 2023-12-11 2024-08-27 Ricoh Company, Ltd. Reordered multibit halftone processing with a threshold array

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
US5086484A (en) * 1988-08-24 1992-02-04 Canon Kabushiki Kaisha Image processing apparatus with fixed or variable threshold
US5068926A (en) * 1989-02-10 1991-12-03 Kaneyuki Suzuki Flush toilet
DE69026846T2 (de) * 1989-02-10 1997-01-09 Canon Kk Bildverarbeitungsvorrichtung
US5309526A (en) * 1989-05-04 1994-05-03 At&T Bell Laboratories Image processing system
JPH0380767A (ja) 1989-08-24 1991-04-05 Ricoh Co Ltd 画像の階調記録装置
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
US5387983A (en) * 1991-09-27 1995-02-07 Minolta Camera Kabushiki Kaisha Facsimile apparatus comprising converting means for converting binary image data into multi-value image data and image processing apparatus judging pseudo half-tone image
US5303069A (en) * 1991-12-19 1994-04-12 Camex, Inc. Method for producing a multitone image
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
JPH05336373A (ja) * 1992-06-04 1993-12-17 Toshiba Corp 画像記録装置
US5278670A (en) * 1992-12-18 1994-01-11 Xerox Corporation Content-based resolution conversion of color documents
DE69520703T2 (de) 1994-03-02 2001-08-02 Hewlett-Packard Co. (N.D.Ges.D.Staates Delaware), Palo Alto Erzeugung von Mehrfachtonbildern

Also Published As

Publication number Publication date
DE69521638T2 (de) 2001-10-25
EP0670653A1 (de) 1995-09-06
CN1085000C (zh) 2002-05-15
US5615021A (en) 1997-03-25
EP0670653B1 (de) 2001-07-11
CN1118903A (zh) 1996-03-20
JPH07283943A (ja) 1995-10-27

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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