JPS5383515A - Quantization circuit for picture signal - Google Patents

Quantization circuit for picture signal

Info

Publication number
JPS5383515A
JPS5383515A JP15935176A JP15935176A JPS5383515A JP S5383515 A JPS5383515 A JP S5383515A JP 15935176 A JP15935176 A JP 15935176A JP 15935176 A JP15935176 A JP 15935176A JP S5383515 A JPS5383515 A JP S5383515A
Authority
JP
Japan
Prior art keywords
picture signal
quantization circuit
threshold level
signal
manuscript
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
JP15935176A
Other languages
Japanese (ja)
Inventor
Yoshio Iizuka
Shinichi Nakai
Masaya Yoshikawa
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP15935176A priority Critical patent/JPS5383515A/en
Publication of JPS5383515A publication Critical patent/JPS5383515A/en
Pending legal-status Critical Current

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  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE: To secure a decision for a proper threshold level regardless of the size of the manuscript, by extracting the signal of the specified section of the picture signal and having a relative change of the threshold level.
COPYRIGHT: (C)1978,JPO&Japio
JP15935176A 1976-12-29 1976-12-29 Quantization circuit for picture signal Pending JPS5383515A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15935176A JPS5383515A (en) 1976-12-29 1976-12-29 Quantization circuit for picture signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15935176A JPS5383515A (en) 1976-12-29 1976-12-29 Quantization circuit for picture signal

Publications (1)

Publication Number Publication Date
JPS5383515A true JPS5383515A (en) 1978-07-24

Family

ID=15691939

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15935176A Pending JPS5383515A (en) 1976-12-29 1976-12-29 Quantization circuit for picture signal

Country Status (1)

Country Link
JP (1) JPS5383515A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5484915A (en) * 1977-12-20 1979-07-06 Ricoh Co Ltd Picture signal processor
JPS5738064A (en) * 1980-08-19 1982-03-02 Matsushita Graphic Commun Syst Inc Video reader

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5484915A (en) * 1977-12-20 1979-07-06 Ricoh Co Ltd Picture signal processor
JPS6248429B2 (en) * 1977-12-20 1987-10-14 Ricoh Kk
JPS5738064A (en) * 1980-08-19 1982-03-02 Matsushita Graphic Commun Syst Inc Video reader
JPS6226630B2 (en) * 1980-08-19 1987-06-10 Matsushita Graphic Communic

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