DE3520028C2 - - Google Patents

Info

Publication number
DE3520028C2
DE3520028C2 DE3520028A DE3520028A DE3520028C2 DE 3520028 C2 DE3520028 C2 DE 3520028C2 DE 3520028 A DE3520028 A DE 3520028A DE 3520028 A DE3520028 A DE 3520028A DE 3520028 C2 DE3520028 C2 DE 3520028C2
Authority
DE
Germany
Prior art keywords
signal
input
image
counting
count
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
DE3520028A
Other languages
German (de)
English (en)
Other versions
DE3520028A1 (de
Inventor
Yukio Inagi Tokio/Tokyo Jp Sato
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 JP11484084A external-priority patent/JPS60259066A/ja
Priority claimed from JP59114838A external-priority patent/JP2597970B2/ja
Priority claimed from JP59114839A external-priority patent/JPH0759037B2/ja
Application filed by Canon Inc filed Critical Canon Inc
Publication of DE3520028A1 publication Critical patent/DE3520028A1/de
Application granted granted Critical
Publication of DE3520028C2 publication Critical patent/DE3520028C2/de
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/40—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • G06T9/005—Statistical coding, e.g. Huffman, run length coding
    • 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
    • H04N1/419—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information in which encoding of the length of a succession of picture-elements of the same value along a scanning line is the only encoding step

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Image Processing (AREA)
  • Compression Of Band Width Or Redundancy In Fax (AREA)
DE19853520028 1984-06-05 1985-06-04 Einrichtung zum komprimieren von bilddaten Granted DE3520028A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP11484084A JPS60259066A (ja) 1984-06-05 1984-06-05 画像デ−タ圧縮装置
JP59114838A JP2597970B2 (ja) 1984-06-05 1984-06-05 画像データ圧縮装置
JP59114839A JPH0759037B2 (ja) 1984-06-05 1984-06-05 画像デ−タ圧縮装置

Publications (2)

Publication Number Publication Date
DE3520028A1 DE3520028A1 (de) 1985-12-05
DE3520028C2 true DE3520028C2 (US20050271598A1-20051208-C00001.png) 1991-01-03

Family

ID=27312837

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19853520028 Granted DE3520028A1 (de) 1984-06-05 1985-06-04 Einrichtung zum komprimieren von bilddaten

Country Status (4)

Country Link
US (1) US4701803A (US20050271598A1-20051208-C00001.png)
DE (1) DE3520028A1 (US20050271598A1-20051208-C00001.png)
FR (1) FR2565441B1 (US20050271598A1-20051208-C00001.png)
GB (1) GB2162401B (US20050271598A1-20051208-C00001.png)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4772955A (en) * 1985-01-31 1988-09-20 Canon Kabushiki Kaisha Data communication apparatus
US4799110A (en) * 1985-08-02 1989-01-17 Canon Kabushiki Kaisha Image signal coding apparatus
DE3602808A1 (de) * 1986-01-30 1987-08-06 Siemens Ag Codiereinrichtung fuer variable wortlaengen
JPS62298280A (ja) * 1986-06-18 1987-12-25 Ricoh Co Ltd 画像符号化方法
DE4025026C2 (de) * 1989-12-07 1997-06-12 Dirr Josef Verfahren zur mehrstufigen Codierung von Information
JP2511158B2 (ja) * 1989-12-19 1996-06-26 シャープ株式会社 画像圧縮装置
JP2842478B2 (ja) * 1990-04-11 1999-01-06 三菱電機株式会社 符号化方法
US5196945A (en) * 1990-09-04 1993-03-23 Motorola, Inc. Data compression/expansion circuit for facsimile apparatus
US5305111A (en) * 1990-12-11 1994-04-19 Industrial Technology Research Institute Run length encoding method and system
US5479587A (en) * 1992-09-03 1995-12-26 Hewlett-Packard Company Page printer having adaptive data compression for memory minimization
US5566254A (en) * 1992-11-06 1996-10-15 Canon Kabushiki Kaisha Apparatus for processing multiple images in alternating fashion
US5504591A (en) * 1994-04-25 1996-04-02 Microsoft Corporation System and method for compressing graphic images
US6665621B2 (en) 2000-11-28 2003-12-16 Scientific Technologies Incorporated System and method for waveform processing

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3510576A (en) * 1966-10-03 1970-05-05 Xerox Corp Data sampler circuit for determining information run lengths
US3748379A (en) * 1970-01-22 1973-07-24 Electronic Image Sys Corp Run length coding technique
US3991267A (en) * 1970-01-26 1976-11-09 Eg & G, Inc. Method for producing a compressed digital representation of a visible image
US3941921A (en) * 1972-09-18 1976-03-02 Hitachi, Ltd. System for converting frequency band of picture signal
US3830963A (en) * 1972-12-11 1974-08-20 Ibm System for data compression by dual word coding having photosensitive memory and associated scanning mechanism
US3974326A (en) * 1973-06-08 1976-08-10 Hasler Ag Facsimile communication system
JPS5242017A (en) * 1975-09-29 1977-04-01 Fuji Xerox Co Ltd Run length code processing method for facsimile signal
JPS5248423A (en) * 1975-10-16 1977-04-18 Kokusai Denshin Denwa Co Ltd <Kdd> Transmission system of facsimile signal
DE2711377C2 (de) * 1977-03-16 1984-08-30 Philips Patentverwaltung Gmbh, 2000 Hamburg Verfahren und Anordnung zur Faksimile-Bildübertragung
US4158856A (en) * 1977-05-18 1979-06-19 Sangamo Weston, Inc. Apparatus and method for generating digital words representative of video information
US4290085A (en) * 1980-05-15 1981-09-15 Faxon Communications Corporation Synchronization system for variable line length facsimile transceivers
DE3217842A1 (de) * 1982-05-07 1983-11-10 H. Berthold Ag, 1000 Berlin Verfahren und vorrichtung zum verarbeiten von bilddaten
US4486784A (en) * 1982-12-27 1984-12-04 International Business Machines Corporation Image compression systems

Also Published As

Publication number Publication date
GB2162401A (en) 1986-01-29
DE3520028A1 (de) 1985-12-05
US4701803A (en) 1987-10-20
GB2162401B (en) 1988-05-18
FR2565441A1 (fr) 1985-12-06
FR2565441B1 (fr) 1994-04-15
GB8514197D0 (en) 1985-07-10

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee