JPS5534558A - Signal process system for optical detector - Google Patents

Signal process system for optical detector

Info

Publication number
JPS5534558A
JPS5534558A JP10728978A JP10728978A JPS5534558A JP S5534558 A JPS5534558 A JP S5534558A JP 10728978 A JP10728978 A JP 10728978A JP 10728978 A JP10728978 A JP 10728978A JP S5534558 A JPS5534558 A JP S5534558A
Authority
JP
Japan
Prior art keywords
video signal
circuit
pulse duration
supplied
signal
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
JP10728978A
Other languages
Japanese (ja)
Inventor
Tadatami Mori
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 JP10728978A priority Critical patent/JPS5534558A/en
Publication of JPS5534558A publication Critical patent/JPS5534558A/en
Pending legal-status Critical Current

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  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE: To compensate the fluctuation of the video signal level caused by the change of the space frequency of the information to be recorded on the paper and then to be read out, by detecting the pulse duration of the video signal and at the same time setting up the reference level according to the detected pulse duration.
CONSTITUTION: The code signal of counter circuit 5 which is obtained by coding the pulse duration of the video signal with 4 bits is held at memory circuit 6. The analog video signal voltage sent from photoelectric conversion sensor 1 is converted via A/D conversion circuit 2 into the digital signal of 16 levels and 4 bits with partitioning into, for example, 16 steps for the range from the white level to the black level. The code signal corresponding to the pulse duration of the video signal sent from circuit 6 is supplied to isolation decision circuit 7. The output from circuit 7 is supplied to table conversion circuit 10, and the reference level according to the pulse duration of the video signal is selected to be supplied to digital comparator 11 and then to deliver the binary coded output.
COPYRIGHT: (C)1980,JPO&Japio
JP10728978A 1978-08-31 1978-08-31 Signal process system for optical detector Pending JPS5534558A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10728978A JPS5534558A (en) 1978-08-31 1978-08-31 Signal process system for optical detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10728978A JPS5534558A (en) 1978-08-31 1978-08-31 Signal process system for optical detector

Publications (1)

Publication Number Publication Date
JPS5534558A true JPS5534558A (en) 1980-03-11

Family

ID=14455311

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10728978A Pending JPS5534558A (en) 1978-08-31 1978-08-31 Signal process system for optical detector

Country Status (1)

Country Link
JP (1) JPS5534558A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5745776A (en) * 1980-09-01 1982-03-15 Ricoh Co Ltd Document information pickup method
JPS6056397A (en) * 1983-09-01 1985-04-01 エスケ−エフ　ステイ−ル　エンジニアリング　アクテイエボラ−グ Method and device for connecting plasma generator to reactor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5745776A (en) * 1980-09-01 1982-03-15 Ricoh Co Ltd Document information pickup method
JPS6056397A (en) * 1983-09-01 1985-04-01 エスケ−エフ　ステイ−ル　エンジニアリング　アクテイエボラ−グ Method and device for connecting plasma generator to reactor
JPH0447438B2 (en) * 1983-09-01 1992-08-03 Skf Steel Eng Ab

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