DE68918157D1 - Bildverarbeitungsverfahren und -vorrichtung. - Google Patents

Bildverarbeitungsverfahren und -vorrichtung.

Info

Publication number
DE68918157D1
DE68918157D1 DE68918157T DE68918157T DE68918157D1 DE 68918157 D1 DE68918157 D1 DE 68918157D1 DE 68918157 T DE68918157 T DE 68918157T DE 68918157 T DE68918157 T DE 68918157T DE 68918157 D1 DE68918157 D1 DE 68918157D1
Authority
DE
Germany
Prior art keywords
image processing
processing method
image
processing
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
DE68918157T
Other languages
English (en)
Other versions
DE68918157T2 (de
Inventor
Shinichi Ishida
Masahiro Sakamoto
Yasuyuki Shinada
Takeshi Ono
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.)
Canon Inc
Original Assignee
Canon Inc
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
Priority claimed from JP63115771A external-priority patent/JPH01284172A/ja
Priority claimed from JP63115778A external-priority patent/JP2763297B2/ja
Priority claimed from JP63115777A external-priority patent/JP2774508B2/ja
Application filed by Canon Inc filed Critical Canon Inc
Publication of DE68918157D1 publication Critical patent/DE68918157D1/de
Application granted granted Critical
Publication of DE68918157T2 publication Critical patent/DE68918157T2/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
    • 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
    • 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
    • H04N1/40025—Circuits exciting or modulating particular heads for reproducing continuous tone value scales
DE68918157T 1988-05-11 1989-05-09 Bildverarbeitungsverfahren und -vorrichtung. Expired - Fee Related DE68918157T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP63115771A JPH01284172A (ja) 1988-05-11 1988-05-11 画像処理装置
JP63115778A JP2763297B2 (ja) 1988-05-11 1988-05-11 画像処理装置
JP63115777A JP2774508B2 (ja) 1988-05-11 1988-05-11 画像処理装置

Publications (2)

Publication Number Publication Date
DE68918157D1 true DE68918157D1 (de) 1994-10-20
DE68918157T2 DE68918157T2 (de) 1995-03-09

Family

ID=27313023

Family Applications (2)

Application Number Title Priority Date Filing Date
DE68918157T Expired - Fee Related DE68918157T2 (de) 1988-05-11 1989-05-09 Bildverarbeitungsverfahren und -vorrichtung.
DE68928863T Expired - Fee Related DE68928863T2 (de) 1988-05-11 1989-05-09 Bildverarbeitungsverfahren und -vorrichtung

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE68928863T Expired - Fee Related DE68928863T2 (de) 1988-05-11 1989-05-09 Bildverarbeitungsverfahren und -vorrichtung

Country Status (3)

Country Link
US (2) US4969052A (de)
EP (2) EP0603167B1 (de)
DE (2) DE68918157T2 (de)

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US5086484A (en) * 1988-08-24 1992-02-04 Canon Kabushiki Kaisha Image processing apparatus with fixed or variable threshold
US5107346A (en) * 1988-10-14 1992-04-21 Bowers Imaging Technologies, Inc. Process for providing digital halftone images with random error diffusion
US5162925A (en) * 1988-11-17 1992-11-10 Canon Kabushiki Kaisha Color image processor capable of performing masking using a reduced number of bits
DE69033372T2 (de) * 1989-04-27 2000-05-11 Canon Kk Bildverarbeitungsvorrichtung
JPH0380767A (ja) * 1989-08-24 1991-04-05 Ricoh Co Ltd 画像の階調記録装置
US5801838A (en) * 1989-10-04 1998-09-01 Array Printers Ab Method and device to improve print quality of gray scales and color for printers
US5051841A (en) * 1989-10-16 1991-09-24 Bowers Imaging Technologies, Inc. Process for providing digital halftone images with random error diffusion
WO1991006172A1 (en) * 1989-10-16 1991-05-02 Bowers Imaging Technologies, Inc. Process for providing digital halftone images with random error diffusion
US5291303A (en) * 1990-01-16 1994-03-01 Canon Kabushiki Kaisha Facsimile apparatus
JPH03274963A (ja) * 1990-03-26 1991-12-05 Canon Inc フアクシミリ装置
US5339171A (en) * 1990-04-24 1994-08-16 Ricoh Company, Ltd. Image processing apparatus especially suitable for producing smooth-edged output multi-level tone data having fewer levels than input multi-level tone data
US5140432A (en) * 1990-09-12 1992-08-18 Hewlett-Packard Company Method and system for printing in one or more color planes with improved control of error diffusion
US5287419A (en) * 1990-10-09 1994-02-15 Matsushita Graphic Communication Systems, Inc. Image signal processer reproducing halftone images in a recording system printed thickened or thinned dots
US5208871A (en) * 1990-10-19 1993-05-04 Xerox Corporation Pixel quantization with adaptive error diffusion
JP2832089B2 (ja) * 1991-01-28 1998-12-02 キヤノン株式会社 画像処理装置
US5210602A (en) * 1991-02-25 1993-05-11 International Business Machines Corporation Coupled-color error diffusion
JP2500834B2 (ja) * 1991-09-05 1996-05-29 ゼロックス コーポレイション 画素値の量子化方法及び装置
JP3384580B2 (ja) * 1992-04-30 2003-03-10 株式会社リコー 地肌除去方法
US5260807A (en) * 1992-06-05 1993-11-09 Eastman Kodak Company Method and apparatus for imbedding controlled structure for gray scale rendering
EP0581575B1 (de) * 1992-07-27 1999-12-29 Tektronix, Inc. System zum intensitätsvariablen Drucken
US5398297A (en) * 1992-07-27 1995-03-14 Tektronix, Inc. Improved color rendering method for intensity-variable printing based upon a dithering table
US5539667A (en) * 1992-09-15 1996-07-23 Gcc Technologies Method and apparatus for improved digital film recorder
US5489991A (en) * 1992-10-09 1996-02-06 International Business Machines Corporation Method for generating digital halftone images
JP3428063B2 (ja) * 1993-04-16 2003-07-22 富士写真フイルム株式会社 画像データの階調変換方法および装置
JPH0738767A (ja) * 1993-07-19 1995-02-07 Canon Inc 画像２値化処理装置
US5521989A (en) * 1993-08-05 1996-05-28 Xerox Corporation Balanced error diffusion system
US5467201A (en) * 1994-05-31 1995-11-14 Xerox Corporation Iterative error diffusion system
US5696601A (en) * 1994-08-03 1997-12-09 Xerox Corporation System and method for redistributing error values from an error diffusion process
US5587811A (en) * 1995-04-28 1996-12-24 Dataproducts Corporation Halftone screen using spot function to rank pixels following one or more design rules
JPH0974488A (ja) * 1995-09-06 1997-03-18 Ricoh Co Ltd 画像処理方法及び装置
JP3674998B2 (ja) * 1995-09-29 2005-07-27 ソニー株式会社 プリンタ装置
US5911009A (en) * 1996-01-25 1999-06-08 Dainippon Screen Mfg. Co., Ltd. Method and apparatus for binary coding of image data including adding error accumulated for a target pixel and a pixel in the vicinity to be later coded
US6097502A (en) * 1996-12-18 2000-08-01 Seiko Epson Corporation Multilevel screening for color laser printer
EP0917348A3 (de) * 1997-11-17 2002-06-19 Xerox Corporation Fehlerdiffusion mit Subpixelmodulation für die Graustufenwiedergabe von kontinuierlichen Bildtonwerten
US6185005B1 (en) 1998-04-30 2001-02-06 Hitachi Koki Imaging Solutions, Inc. Half tone image enhancement for printers
JP3872919B2 (ja) * 1998-05-22 2007-01-24 東芝テック株式会社 画像処理装置
JP3503511B2 (ja) * 1999-02-05 2004-03-08 セイコーエプソン株式会社 印刷装置、印刷方法およびプリンタ
US6594035B1 (en) 1999-08-16 2003-07-15 Hewlett-Packard Development Company, L.P. System and memory-buffer management method for reducing random access memory requirements in error diffusion halftone applications
US8009327B2 (en) * 2002-07-11 2011-08-30 Canon Kabushiki Kaisha Method and apparatus for image processing
JP4960796B2 (ja) * 2007-08-03 2012-06-27 キヤノン株式会社 画像処理装置、画像処理方法ならびにそのプログラム及び記憶媒体
JP6472336B2 (ja) * 2014-06-18 2019-02-20 キヤノン株式会社 画像処理装置、画像処理方法およびプログラム

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DE1772367C3 (de) * 1968-05-04 1974-10-31 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren zur gerasterten Reproduktion von Halbtonbildern
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US4389712A (en) * 1978-03-09 1983-06-21 Itek Corporation High information density laser image recording method and apparatus
JPS5563173A (en) * 1978-11-06 1980-05-13 Ricoh Co Ltd Picture signal processing system
EP0031247B1 (de) * 1979-12-20 1984-03-14 Cambridge Consultants Limited Vorrichtung und Verfahren zur Herstellung eines aus Streupunkten bestehenden Halbtonbildes aus einem Normalbild
JPS56100572A (en) * 1980-01-17 1981-08-12 Fuji Photo Film Co Ltd Signal processing system of variable density picture
FR2497043B1 (fr) * 1980-12-19 1985-09-13 Cit Alcatel Dispositif d'impression d'une image
US4449150A (en) * 1981-01-19 1984-05-15 Ricoh Company, Ltd. Method of processing medium tone picture
US4503444A (en) * 1983-04-29 1985-03-05 Hewlett-Packard Company Method and apparatus for generating a gray scale with a high speed thermal ink jet printer
ATE29814T1 (de) * 1983-05-02 1987-10-15 Ibm Verfahren fuer die bildwiedergabe mit grauwerten.
JPH0666872B2 (ja) * 1983-07-28 1994-08-24 富士ゼロックス株式会社 感熱中間調記録装置
JPS60230768A (ja) * 1984-04-28 1985-11-16 Toshiba Corp 画像信号の二値化方式
US4654721A (en) * 1985-04-12 1987-03-31 International Business Machines Corporation System for reproducing multi-level digital images on a bi-level printer of fixed dot size
US4668995A (en) * 1985-04-12 1987-05-26 International Business Machines Corporation System for reproducing mixed images
JPS6240872A (ja) * 1985-08-16 1987-02-21 Seikosha Co Ltd 感熱記録装置
US4680645A (en) * 1986-08-25 1987-07-14 Hewlett-Packard Company Method for rendering gray scale images with variable dot sizes
DE3785558T3 (de) * 1986-12-19 1997-04-10 Matsushita Electric Ind Co Ltd Gerät zur Verarbeitung von Signalen für die Anzeige von Bildern mit zwei Pegeln.
US4876610A (en) * 1986-12-25 1989-10-24 Canon Kabushiki Kaisha Image processing apparatus with binarization-error dispersal
US4878125A (en) * 1987-01-08 1989-10-31 Canon Kabushiki Kaisha Method and apparatus for image processing with fed-back error correction
US5008950A (en) * 1987-01-22 1991-04-16 Canon Kabushiki Kaisha Image processing method and apparatus for error-dispersion digitization without moire or spurious stripe formation
US4958218A (en) * 1987-12-16 1990-09-18 Canon Kabushiki Kaisha Image processing method and apparatus with dot-processing
JP2683014B2 (ja) * 1988-03-08 1997-11-26 キヤノン株式会社 画像処理方法及び装置
US4924322A (en) * 1988-03-18 1990-05-08 Matsushita Electric Industrial Co., Ltd. Bi-level image display signal processing apparatus
US4969052A (en) * 1988-05-11 1990-11-06 Canon Kabushiki Kaisha Image processing method and apparatus

Also Published As

Publication number Publication date
EP0341984A2 (de) 1989-11-15
DE68928863T2 (de) 1999-05-12
US5159470A (en) 1992-10-27
EP0603167A1 (de) 1994-06-22
EP0341984A3 (de) 1991-03-20
EP0603167B1 (de) 1998-11-25
EP0341984B1 (de) 1994-09-14
US4969052A (en) 1990-11-06
DE68928863D1 (de) 1999-01-07
DE68918157T2 (de) 1995-03-09

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee