[go: up one dir, main page]

JPS57106275A - Method for compression of multilevel picture data - Google Patents

Method for compression of multilevel picture data

Info

Publication number
JPS57106275A
JPS57106275A JP18256080A JP18256080A JPS57106275A JP S57106275 A JPS57106275 A JP S57106275A JP 18256080 A JP18256080 A JP 18256080A JP 18256080 A JP18256080 A JP 18256080A JP S57106275 A JPS57106275 A JP S57106275A
Authority
JP
Japan
Prior art keywords
section
encoded
density level
scanning steps
continuity
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.)
Pending
Application number
JP18256080A
Other languages
Japanese (ja)
Inventor
Yoshitoshi Yamauchi
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP18256080A priority Critical patent/JPS57106275A/en
Publication of JPS57106275A publication Critical patent/JPS57106275A/en
Pending 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)

Abstract

PURPOSE:To compress multilevel picture data efficiently, by performing the run length encoding in a section of a constant density level and by encoding a density level difference in a section of continuity of the change of the density level and by adding a section end code. CONSTITUTION:Since scanning steps 0-3 are in a section of continuity of the white level, this section is encoded to ''010'' of the Weyl code. Since scanning steps 3-7 are in a section where the density level is changed continuously, scanning steps 4, 5, 6, and 7 are encoded to ''011'', ''101'', ''1110'', and ''1111'' is accordance with respective picture element density levels. After them, ''110'' of the section end code (EOD) is added. Since scanning steps 7-9 are in a section of continuity of the density level 7, this section is encoded to ''10'' of the mix code. Sections are encoded similarly hereafter.
JP18256080A 1980-12-23 1980-12-23 Method for compression of multilevel picture data Pending JPS57106275A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18256080A JPS57106275A (en) 1980-12-23 1980-12-23 Method for compression of multilevel picture data

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18256080A JPS57106275A (en) 1980-12-23 1980-12-23 Method for compression of multilevel picture data

Publications (1)

Publication Number Publication Date
JPS57106275A true JPS57106275A (en) 1982-07-02

Family

ID=16120400

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18256080A Pending JPS57106275A (en) 1980-12-23 1980-12-23 Method for compression of multilevel picture data

Country Status (1)

Country Link
JP (1) JPS57106275A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5990209A (en) * 1982-11-12 1984-05-24 Victor Co Of Japan Ltd Information recording disk and its reproducing device
JPS62108282A (en) * 1985-11-06 1987-05-19 松下電器産業株式会社 Image display unit
JPS62140179A (en) * 1985-12-13 1987-06-23 Canon Inc Image editing processor
JPH03119865A (en) * 1989-09-30 1991-05-22 Minolta Camera Co Ltd Image data compression device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5990209A (en) * 1982-11-12 1984-05-24 Victor Co Of Japan Ltd Information recording disk and its reproducing device
JPS62108282A (en) * 1985-11-06 1987-05-19 松下電器産業株式会社 Image display unit
JPS62140179A (en) * 1985-12-13 1987-06-23 Canon Inc Image editing processor
JPH03119865A (en) * 1989-09-30 1991-05-22 Minolta Camera Co Ltd Image data compression device

Similar Documents

Publication Publication Date Title
JPS64878A (en) Picture data compressing method
DE69329796D1 (en) METHOD FOR CODING, DECODING AND COMPRESSING AUDIO DATA
EP0888010A3 (en) Image encoding method and apparatus
MXPA04004770A (en) Variable length coding method and variable length decoding method.
DE69533500D1 (en) METHOD AND DEVICE FOR ENCODING AND DECODING MESSAGES
JPS6444499A (en) Forecast encoding system for voice
ATE81575T1 (en) METHOD OF SYNCHRONIZING FOR THE TRANSMISSION OVER AN ASYNCHRONOUS CHANNEL OF A SERIES OF CODED PICTURES CODED BY A CODE OF VARIABLE LENGTH AND DEVICE FOR CARRYING OUT THESE METHOD.
ES8309046A1 (en) Method of coding a sequence of blocks of binary data bits into a sequence of blocks of binary channel bits and arrangement for decoding the data bits coded in accordance with the method
MX9801191A (en) Video coder employing pixel transposition.
JPS57106275A (en) Method for compression of multilevel picture data
DE3787865D1 (en) Facsimile transmission and compression method.
JPS57106273A (en) Method for compression of multilevel picture data
IT8222199A0 (en) TRANSMISSION, PARTICULARLY FOR A RAILWAY ENGINE FOR SELECTABLE OPERATION WITH MIXED, ARTIFICIAL AND NATURAL GRIP, OR FOR ONLY NATURAL GRIP OPERATION, WITH A BRANCHING MECHANISM.
JPS57106272A (en) Method for compression of multilevel picture data
CA2101832A1 (en) Method and apparatus for encoding and decoding digital image data
DE3381561D1 (en) METHOD FOR PRODUCING 4,4'-BIS-BENZ-OX (-THI, -IMID) -AZOL-2-YL STILBENES.
JPS57106274A (en) Method for compression in multilevel picture data
ATE170355T1 (en) METHOD FOR ENCODING VERY LOW DATA RATE IMAGES AND ENCODING APPARATUS FOR EXECUTING THIS METHOD
DE3889560D1 (en) Method for compressing image signals by vector quantization.
JPS56115078A (en) Coding method of picture information
JPS5778278A (en) Video coding method
DE68926760D1 (en) Method and system for compressing encoded color video data
JPS5630366A (en) Picture coding method
JPS56169966A (en) Video information coding method
JPS5579569A (en) Linear coding system for facsimile signal