FR2246140B1 - - Google Patents

Info

Publication number
FR2246140B1
FR2246140B1 FR7421944A FR7421944A FR2246140B1 FR 2246140 B1 FR2246140 B1 FR 2246140B1 FR 7421944 A FR7421944 A FR 7421944A FR 7421944 A FR7421944 A FR 7421944A FR 2246140 B1 FR2246140 B1 FR 2246140B1
Authority
FR
France
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
Application number
FR7421944A
Other versions
FR2246140A1 (fr
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
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of FR2246140A1 publication Critical patent/FR2246140A1/fr
Application granted granted Critical
Publication of FR2246140B1 publication Critical patent/FR2246140B1/fr
Expired 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
    • H04N1/41—Bandwidth or redundancy reduction
    • H04N1/411—Bandwidth or redundancy reduction for the transmission or storage or reproduction of two-tone pictures, e.g. black and white pictures
    • H04N1/413—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information
    • H04N1/415—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information in which the picture-elements are subdivided or grouped into fixed one-dimensional or two-dimensional blocks

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Compression Of Band Width Or Redundancy In Fax (AREA)
FR7421944A 1973-07-16 1974-06-12 Expired FR2246140B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US37952373A 1973-07-16 1973-07-16

Publications (2)

Publication Number Publication Date
FR2246140A1 FR2246140A1 (fr) 1975-04-25
FR2246140B1 true FR2246140B1 (fr) 1980-11-28

Family

ID=23497605

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7421944A Expired FR2246140B1 (fr) 1973-07-16 1974-06-12

Country Status (4)

Country Link
JP (1) JPS5040015A (fr)
DE (1) DE2423817A1 (fr)
FR (1) FR2246140B1 (fr)
GB (1) GB1442016A (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4054951A (en) * 1976-06-30 1977-10-18 International Business Machines Corporation Data expansion apparatus
US4091424A (en) * 1977-02-18 1978-05-23 Compression Labs, Inc. Facsimile compression system
JPS5821979B2 (ja) * 1977-05-02 1983-05-06 日本電信電話株式会社 画像信号の網点処理方式
JPS5929020B2 (ja) * 1977-06-08 1984-07-17 松下電器産業株式会社 ２次元ブロック符号化方法
JPS5533349A (en) * 1978-08-30 1980-03-08 Ricoh Co Ltd Intermediate gradation processing system by binary value
DE2931098C2 (de) * 1979-07-31 1983-01-05 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren zur Druckformherstellung
JPS5666971A (en) * 1979-11-05 1981-06-05 Dainippon Screen Mfg Co Ltd Picture data compressing method
JPS5666970A (en) * 1979-11-06 1981-06-05 Toshiba Corp Binary device of variable density type picture
JPS57181270A (en) * 1982-04-16 1982-11-08 Hitachi Ltd Encoding system for binary picture signal
JPS59178077A (ja) * 1983-03-28 1984-10-09 Dainippon Screen Mfg Co Ltd ２値画像のデ−タ圧縮方法
JPS62100077A (ja) * 1985-10-28 1987-05-09 Nippon Telegr & Teleph Corp <Ntt> 符号化方法および装置
JPS6379185A (ja) * 1986-09-22 1988-04-09 Meidensha Electric Mfg Co Ltd Ｃｒｔ表示デ−タ作成装置
GB8627787D0 (en) * 1986-11-20 1986-12-17 British Telecomm Pattern processing
US5048112A (en) * 1990-04-25 1991-09-10 Hughes Aircraft Company Data decompression system and method
US5109438A (en) * 1990-04-25 1992-04-28 Hughes Aircraft Company Data compression system and method
JP4424845B2 (ja) * 1999-12-20 2010-03-03 本田 正 イメージデータ圧縮方法及び復元方法
DE10328179A1 (de) * 2003-06-16 2005-01-20 Alcoa Deutschland Gmbh Verschließsystem und Verfahren zum Verschließen von Behältern

Also Published As

Publication number Publication date
GB1442016A (en) 1976-07-07
JPS5040015A (fr) 1975-04-12
FR2246140A1 (fr) 1975-04-25
DE2423817A1 (de) 1975-02-06

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Legal Events

Date Code Title Description
ST Notification of lapse