DE3685505D1 - Verfahren zum umwandeln von bildgraupegeln. - Google Patents

Verfahren zum umwandeln von bildgraupegeln.

Info

Publication number
DE3685505D1
DE3685505D1 DE8686102032T DE3685505T DE3685505D1 DE 3685505 D1 DE3685505 D1 DE 3685505D1 DE 8686102032 T DE8686102032 T DE 8686102032T DE 3685505 T DE3685505 T DE 3685505T DE 3685505 D1 DE3685505 D1 DE 3685505D1
Authority
DE
Germany
Prior art keywords
gray levels
image gray
converting image
converting
levels
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
DE8686102032T
Other languages
English (en)
Inventor
Hideo Asano
Eisuke Kanzaki
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=13246085&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3685505(D1) "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
Application granted granted Critical
Publication of DE3685505D1 publication Critical patent/DE3685505D1/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
    • H04N1/40062—Discrimination between different image types, e.g. two-tone, continuous tone

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Image Processing (AREA)
DE8686102032T 1985-03-29 1986-02-18 Verfahren zum umwandeln von bildgraupegeln. Expired - Lifetime DE3685505D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60064021A JPS61225975A (ja) 1985-03-29 1985-03-29 ２値信号への変換方法

Publications (1)

Publication Number Publication Date
DE3685505D1 true DE3685505D1 (de) 1992-07-09

Family

ID=13246085

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8686102032T Expired - Lifetime DE3685505D1 (de) 1985-03-29 1986-02-18 Verfahren zum umwandeln von bildgraupegeln.

Country Status (3)

Country Link
EP (1) EP0195925B1 (de)
JP (1) JPS61225975A (de)
DE (1) DE3685505D1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2744619B2 (ja) * 1988-06-28 1998-04-28 富士通株式会社 画像処理装置
JPH02100575A (ja) * 1988-10-07 1990-04-12 Toshiba Corp 画像処理装置
US6185335B1 (en) 1998-07-07 2001-02-06 Electronics For Imaging, Inc. Method and apparatus for image classification and halftone detection
JP2002010097A (ja) * 2000-04-20 2002-01-11 Hewlett Packard Co <Hp> カラーおよびグレイスケール・データを選択的に出力する回路
GB2401703B (en) 2000-06-30 2005-01-19 Royal Mail Group Plc Image processing

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5915549B2 (ja) 1978-05-11 1984-04-10 株式会社東芝 文字読取機能を有するファクシミリ装置
JPS5566174A (en) 1978-11-13 1980-05-19 Ricoh Co Ltd Reproducer of gradation picture
US4194221A (en) * 1978-12-26 1980-03-18 Xerox Corporation Automatic multimode continuous halftone line copy reproduction
JPS583374A (ja) * 1981-06-29 1983-01-10 Nippon Telegr & Teleph Corp <Ntt> 中間調処理方式
JPS58119268A (ja) * 1982-01-11 1983-07-15 Matsushita Graphic Commun Syst Inc 画信号処理方式
JPS58215882A (ja) * 1982-06-07 1983-12-15 インタ−ナシヨナル　ビジネス　マシ−ンズ　コ−ポレ−シヨン ドキユメント分類方法

Also Published As

Publication number Publication date
JPS61225975A (ja) 1986-10-07
EP0195925B1 (de) 1992-06-03
EP0195925A3 (en) 1989-02-08
EP0195925A2 (de) 1986-10-01

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Legal Events

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