JPS57106273A - Method for compression of multilevel picture data - Google Patents

Method for compression of multilevel picture data

Info

Publication number
JPS57106273A
JPS57106273A JP18243080A JP18243080A JPS57106273A JP S57106273 A JPS57106273 A JP S57106273A JP 18243080 A JP18243080 A JP 18243080A JP 18243080 A JP18243080 A JP 18243080A JP S57106273 A JPS57106273 A JP S57106273A
Authority
JP
Japan
Prior art keywords
section
continuity
encoded
density level
scanning steps
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
JP18243080A
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 JP18243080A priority Critical patent/JPS57106273A/en
Publication of JPS57106273A publication Critical patent/JPS57106273A/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, they are encoded to ''010'' of the Weyl code. Since scanning steps 3-7 are in a section of continuity of the change of the density level, they are encoded to respective picture element density levels ''011'', ''101'', ''1110'', and ''1111'' of scanning steps 4, 5, 6, and 7, and a section end code EOD ''110'' is added. Since scanning steps 7-9 are in a section of continuity of the density level 7, they are encoded to ''10'' of the mix code. Sections are encoded similarly hereafter.
JP18243080A 1980-12-22 1980-12-22 Method for compression of multilevel picture data Pending JPS57106273A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18243080A JPS57106273A (en) 1980-12-22 1980-12-22 Method for compression of multilevel picture data

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18243080A JPS57106273A (en) 1980-12-22 1980-12-22 Method for compression of multilevel picture data

Publications (1)

Publication Number Publication Date
JPS57106273A true JPS57106273A (en) 1982-07-02

Family

ID=16118129

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18243080A Pending JPS57106273A (en) 1980-12-22 1980-12-22 Method for compression of multilevel picture data

Country Status (1)

Country Link
JP (1) JPS57106273A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63148789A (en) * 1986-10-27 1988-06-21 コムプレッション　ラブズ　インコーポレーテッド Coding system for reducing redundancy
JP2007507182A (en) * 2003-09-25 2007-03-22 ピアレス・システムズ・コーポレーション Divided run-length encoding method and apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63148789A (en) * 1986-10-27 1988-06-21 コムプレッション　ラブズ　インコーポレーテッド Coding system for reducing redundancy
JP2007507182A (en) * 2003-09-25 2007-03-22 ピアレス・システムズ・コーポレーション Divided run-length encoding method and apparatus
KR101180098B1 (en) * 2003-09-25 2012-09-05 피어리스 시스템즈 코퍼레이션 Split runlength encoding method and apparatus

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