JPH0472433B2 - - Google Patents

Info

Publication number
JPH0472433B2
JPH0472433B2 JP61068890A JP6889086A JPH0472433B2 JP H0472433 B2 JPH0472433 B2 JP H0472433B2 JP 61068890 A JP61068890 A JP 61068890A JP 6889086 A JP6889086 A JP 6889086A JP H0472433 B2 JPH0472433 B2 JP H0472433B2
Authority
JP
Japan
Prior art keywords
block
gray scale
error
image
adjacent
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
JP61068890A
Other languages
English (en)
Japanese (ja)
Other versions
JPS61237574A (ja
Inventor
Gootsueru Jerarudo
Robaato Tonpuson Gahaado
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=24903880&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JPH0472433(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of JPS61237574A publication Critical patent/JPS61237574A/ja
Publication of JPH0472433B2 publication Critical patent/JPH0472433B2/ja
Granted 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
    • H04N1/4051—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a dispersed dots halftone pattern, the dots having substantially the same size
    • H04N1/4052—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a dispersed dots halftone pattern, the dots having substantially the same size by error diffusion, i.e. transferring the binarising error to neighbouring dot decisions
    • 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)
  • Image Processing (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Color, Gradation (AREA)
JP61068890A 1985-04-12 1986-03-28 ハーフトーン・イメージの形成方法 Granted JPS61237574A (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US722898 1985-04-12
US06/722,898 US4654721A (en) 1985-04-12 1985-04-12 System for reproducing multi-level digital images on a bi-level printer of fixed dot size

Publications (2)

Publication Number Publication Date
JPS61237574A JPS61237574A (ja) 1986-10-22
JPH0472433B2 true JPH0472433B2 (OSRAM) 1992-11-18

Family

ID=24903880

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61068890A Granted JPS61237574A (ja) 1985-04-12 1986-03-28 ハーフトーン・イメージの形成方法

Country Status (5)

Country Link
US (1) US4654721A (OSRAM)
EP (1) EP0201674B2 (OSRAM)
JP (1) JPS61237574A (OSRAM)
CA (1) CA1248878A (OSRAM)
DE (1) DE3674943D1 (OSRAM)

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DE3816780A1 (de) * 1987-05-18 1988-12-01 Canon Kk Verfahren und einrichtung zur bildverarbeitung
JP2662402B2 (ja) * 1987-11-16 1997-10-15 キヤノン株式会社 画像処理装置
DE3838730C2 (de) * 1987-11-16 1994-07-28 Canon Kk Verfahren und Vorrichtung zur Bildverarbeitung
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US4969052A (en) * 1988-05-11 1990-11-06 Canon Kabushiki Kaisha Image processing method and apparatus
US5086484A (en) * 1988-08-24 1992-02-04 Canon Kabushiki Kaisha Image processing apparatus with fixed or variable threshold
JPH0260771A (ja) * 1988-08-29 1990-03-01 Canon Inc 画像処理方式
JP2755307B2 (ja) * 1988-08-29 1998-05-20 キヤノン株式会社 画像処理装置
US5153749A (en) * 1988-09-01 1992-10-06 Canon Kabushiki Kaisha Image encoding apparatus
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JPH02192966A (ja) * 1989-01-23 1990-07-30 Canon Inc 画像形成装置
JP2793205B2 (ja) * 1988-10-20 1998-09-03 キヤノン株式会社 画像処理方法
US5162925A (en) * 1988-11-17 1992-11-10 Canon Kabushiki Kaisha Color image processor capable of performing masking using a reduced number of bits
NL8902654A (nl) * 1988-11-24 1990-06-18 Oce Nederland Bv Werkwijze en inrichting voor het verwerken en weergeven van beeldinformatie.
US5051844A (en) * 1989-01-30 1991-09-24 Eastman Kodak Company Digital halftoning with error diffusion
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US4926267A (en) * 1989-05-26 1990-05-15 Nynex Corporation Reproduction of halftone original with reduced moire
US5053887A (en) * 1989-06-27 1991-10-01 Ibm Corporation Technique for producing a fine grained dithered halftone image having an increased number of gray levels
JPH0380767A (ja) * 1989-08-24 1991-04-05 Ricoh Co Ltd 画像の階調記録装置
US5070413A (en) * 1989-10-10 1991-12-03 Eastman Kodak Company Color digital halftoning with vector error diffusion
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US5087981A (en) * 1990-01-02 1992-02-11 Eastman Kodak Company Error diffusion of overlapping dots
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US5130823A (en) * 1991-06-27 1992-07-14 Cactus Error diffusion system
US5276535A (en) * 1991-12-24 1994-01-04 Levien Raphael L Method and apparatus for halftoning of images using grayscale error diffusion
US5226096A (en) * 1991-10-11 1993-07-06 Xerox Corporation Digital halftoning with selectively applied dot-to-dot error diffusion
US5268774A (en) * 1991-11-27 1993-12-07 Xerox Corporation Halftoning with enhanced dynamic range and edge enhanced error diffusion
US5243443A (en) * 1991-12-06 1993-09-07 Xerox Corporation Halftoning with error feedback and image dependent enhancement
US5245678A (en) * 1991-12-20 1993-09-14 Xerox Corporation Image conversion with lossy adaptive error diffusion
WO1993013513A1 (en) * 1991-12-24 1993-07-08 Cirrus Logic, Inc. Process for producing shaded images on display screens
US5751265A (en) * 1991-12-24 1998-05-12 Cirrus Logic, Inc. Apparatus and method for producing shaded images on display screens
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
AU656057B2 (en) * 1992-03-27 1995-01-19 Milliken & Company Method and apparatus for reproducing blended colorants on an electronic display
US5260807A (en) * 1992-06-05 1993-11-09 Eastman Kodak Company Method and apparatus for imbedding controlled structure for gray scale rendering
US5363213A (en) * 1992-06-08 1994-11-08 Xerox Corporation Unquantized resolution conversion of bitmap images using error diffusion
US5337160A (en) * 1992-07-01 1994-08-09 Hewlett-Packard Error diffusion processor and method for converting a grey scale pixel image to a binary value pixel image
US5374997A (en) * 1992-07-31 1994-12-20 Xerox Corporation High addressability error diffusion with minimum mark size
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
US5321525A (en) * 1992-12-14 1994-06-14 Xerox Corporation Clustered halftoning with dot-to-dot error diffusion
US5325211A (en) * 1993-01-04 1994-06-28 Xerox Corporation Error diffusion with output and input based feedback
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EP0620672B1 (de) * 1993-04-08 1999-09-15 Heidelberger Druckmaschinen Aktiengesellschaft Verfahren zur Optimierung von frequenzmodulierten Rastern unter Nutzung von Schwellwertgebirgen
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JP3603906B2 (ja) * 1994-04-15 2004-12-22 富士写真フイルム株式会社 画像信号２値化処理装置および方法
US5592592A (en) * 1994-07-01 1997-01-07 Seiko Epson Corporation Method and apparatus for minimizing artifacts in images produced by error diffusion halftoning utilizing ink reduction processing
US5692109A (en) * 1994-07-01 1997-11-25 Seiko Epson Corporation Method and apparatus for minimizing artifacts in images produced by error diffusion halftoning
US5493416A (en) * 1994-10-31 1996-02-20 Xerox Corporation Method combining error diffusion and traditional halftoning with arbitrary screen orientation
JPH08204971A (ja) * 1994-10-31 1996-08-09 Xerox Corp 予測符号化と誤差拡散を用いた画像圧縮方法
DE69526559T2 (de) * 1994-11-08 2002-08-22 Xerox Corp., Rochester Halbtonrasterung von Bildelementpaaren für einen Drucker mit hoher Schärfe
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JP3666427B2 (ja) * 2000-10-06 2005-06-29 セイコーエプソン株式会社 画像処理装置、印刷制御装置、画像処理方法、および記録媒体
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GB2473475B (en) 2009-09-11 2014-12-17 Andrew William Peter Cave Computer program for generating 1-bit image data from multiple-bit image data
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Also Published As

Publication number Publication date
DE3674943D1 (de) 1990-11-22
EP0201674A3 (en) 1987-09-16
US4654721A (en) 1987-03-31
EP0201674A2 (en) 1986-11-20
EP0201674B2 (en) 1994-04-13
EP0201674B1 (en) 1990-10-17
JPS61237574A (ja) 1986-10-22
CA1248878A (en) 1989-01-17

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