JPS5761380A - Picture encoding system - Google Patents

Picture encoding system

Info

Publication number
JPS5761380A
JPS5761380A JP55136012A JP13601280A JPS5761380A JP S5761380 A JPS5761380 A JP S5761380A JP 55136012 A JP55136012 A JP 55136012A JP 13601280 A JP13601280 A JP 13601280A JP S5761380 A JPS5761380 A JP S5761380A
Authority
JP
Japan
Prior art keywords
run length
density level
detected
generation
code
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.)
Granted
Application number
JP55136012A
Other languages
Japanese (ja)
Other versions
JPH0213511B2 (en
Inventor
Koichi Ejiri
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 JP55136012A priority Critical patent/JPS5761380A/en
Publication of JPS5761380A publication Critical patent/JPS5761380A/en
Publication of JPH0213511B2 publication Critical patent/JPH0213511B2/ja
Granted 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 encode effectively an image having small ratio of intermediate tone on such as a writing and picture having high texture density, by assigning the shortest code to the specified condition having a high probability of generation. CONSTITUTION:The density level of an image signal is detected by a multiple quantizer 52 and further, the number of picture elements of the same density level (run length) are detected by a run length counter 54. In a condition decision circuit 56, within the detection results of multiple quantizer 52 and run length counter 54, one peculiar code is generated for a special combination having a high probability of generation, and as to the other combination, sets of peculiar code are respectively generated for density level and run length.
JP55136012A 1980-09-30 1980-09-30 Picture encoding system Granted JPS5761380A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55136012A JPS5761380A (en) 1980-09-30 1980-09-30 Picture encoding system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55136012A JPS5761380A (en) 1980-09-30 1980-09-30 Picture encoding system

Publications (2)

Publication Number Publication Date
JPS5761380A true JPS5761380A (en) 1982-04-13
JPH0213511B2 JPH0213511B2 (en) 1990-04-04

Family

ID=15165113

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55136012A Granted JPS5761380A (en) 1980-09-30 1980-09-30 Picture encoding system

Country Status (1)

Country Link
JP (1) JPS5761380A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58215869A (en) * 1982-06-07 1983-12-15 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Method of compressing gray scale video data
JPS60173674A (en) * 1984-01-28 1985-09-07 Nippon Telegr & Teleph Corp <Ntt> Multi-value pattern processing system
JPH03203467A (en) * 1989-12-29 1991-09-05 Matsushita Electric Ind Co Ltd Device for compressing full color still picture data

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53149710A (en) * 1977-06-01 1978-12-27 Toshiba Corp Coding system
JPS5566175A (en) * 1978-11-14 1980-05-19 Nippon Telegr & Teleph Corp <Ntt> Redundancy suppression coding system
JPS5567274A (en) * 1978-11-14 1980-05-21 Nippon Telegr & Teleph Corp <Ntt> Picture signal coding system
JPS5588469A (en) * 1978-12-26 1980-07-04 Ricoh Co Ltd Coding method for picture signal including intermediate gradation level

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53149710A (en) * 1977-06-01 1978-12-27 Toshiba Corp Coding system
JPS5566175A (en) * 1978-11-14 1980-05-19 Nippon Telegr & Teleph Corp <Ntt> Redundancy suppression coding system
JPS5567274A (en) * 1978-11-14 1980-05-21 Nippon Telegr & Teleph Corp <Ntt> Picture signal coding system
JPS5588469A (en) * 1978-12-26 1980-07-04 Ricoh Co Ltd Coding method for picture signal including intermediate gradation level

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58215869A (en) * 1982-06-07 1983-12-15 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Method of compressing gray scale video data
JPS60173674A (en) * 1984-01-28 1985-09-07 Nippon Telegr & Teleph Corp <Ntt> Multi-value pattern processing system
JPH03203467A (en) * 1989-12-29 1991-09-05 Matsushita Electric Ind Co Ltd Device for compressing full color still picture data

Also Published As

Publication number Publication date
JPH0213511B2 (en) 1990-04-04

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