JPS5711577A - Coding method for picture information - Google Patents

Coding method for picture information

Info

Publication number
JPS5711577A
JPS5711577A JP8550080A JP8550080A JPS5711577A JP S5711577 A JPS5711577 A JP S5711577A JP 8550080 A JP8550080 A JP 8550080A JP 8550080 A JP8550080 A JP 8550080A JP S5711577 A JPS5711577 A JP S5711577A
Authority
JP
Japan
Prior art keywords
counter
video element
coincided
comparator
produced
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
JP8550080A
Other languages
Japanese (ja)
Other versions
JPH0113673B2 (en
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 JP8550080A priority Critical patent/JPS5711577A/en
Publication of JPS5711577A publication Critical patent/JPS5711577A/en
Publication of JPH0113673B2 publication Critical patent/JPH0113673B2/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

Abstract

PURPOSE:To enable to reproduce an original picture with fidelity, by coding picture information read in the video element unit at a density level of multitone with a density transition mode code. CONSTITUTION:An input video signal BS transmitted in video element unit from a scanner is converted at an A/D converter 2 in 8-state quantization through an amplifier 1 to obtain a density transition mode distribution according to the contrast level difference while being shifted according to the video element clock at a shift register group 4. Each output of registers SR0 and SR1 is compared 6 and when they are coincided, ''1'' is produced and when not coincided, ''0'' is produced. After reading in the content of a counter 7 during the period in response to the ''0'' signal from the comparator 6, the counter 7 is reset. Further, according to each information from the comparator 6 and the counter 7, a CPU8 makes coding for external output.
JP8550080A 1980-06-24 1980-06-24 Coding method for picture information Granted JPS5711577A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8550080A JPS5711577A (en) 1980-06-24 1980-06-24 Coding method for picture information

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8550080A JPS5711577A (en) 1980-06-24 1980-06-24 Coding method for picture information

Publications (2)

Publication Number Publication Date
JPS5711577A true JPS5711577A (en) 1982-01-21
JPH0113673B2 JPH0113673B2 (en) 1989-03-07

Family

ID=13860647

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8550080A Granted JPS5711577A (en) 1980-06-24 1980-06-24 Coding method for picture information

Country Status (1)

Country Link
JP (1) JPS5711577A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5857865A (en) * 1981-09-30 1983-04-06 Fujitsu Ltd Picture information transmitting system
JPS58168389A (en) * 1982-03-29 1983-10-04 Mitsubishi Electric Corp Encoding device of picture
JPS6167370A (en) * 1984-09-11 1986-04-07 Oki Electric Ind Co Ltd Gradation picture coding and decoding method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5857865A (en) * 1981-09-30 1983-04-06 Fujitsu Ltd Picture information transmitting system
JPS58168389A (en) * 1982-03-29 1983-10-04 Mitsubishi Electric Corp Encoding device of picture
JPH0423867B2 (en) * 1982-03-29 1992-04-23 Mitsubishi Electric Corp
JPS6167370A (en) * 1984-09-11 1986-04-07 Oki Electric Ind Co Ltd Gradation picture coding and decoding method

Also Published As

Publication number Publication date
JPH0113673B2 (en) 1989-03-07

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