JPS54114918A - Line density selection system for reader for video information - Google Patents

Line density selection system for reader for video information

Info

Publication number
JPS54114918A
JPS54114918A JP2155878A JP2155878A JPS54114918A JP S54114918 A JPS54114918 A JP S54114918A JP 2155878 A JP2155878 A JP 2155878A JP 2155878 A JP2155878 A JP 2155878A JP S54114918 A JPS54114918 A JP S54114918A
Authority
JP
Japan
Prior art keywords
video signal
read
pulse
line density
reduced
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
JP2155878A
Other languages
Japanese (ja)
Other versions
JPS6117386B2 (en
Inventor
Fumihiro Ogasawara
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 JP2155878A priority Critical patent/JPS54114918A/en
Publication of JPS54114918A publication Critical patent/JPS54114918A/en
Publication of JPS6117386B2 publication Critical patent/JPS6117386B2/ja
Granted legal-status Critical Current

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Abstract

PURPOSE: To obtain the video signal of scanning line density reduced in number, by picking up specific video signal from the video signal with the sampling pulse having the reduced frequency for the read-in pulse frequency.
CONSTITUTION: From the clock pulse generator 11, the sampling pulse (d) reduced to a given frequency according to the desired line density and the read-in pulse (c) is generated. Further, the read-in head 13 consisting of a plural number of self-scanning type photo detection elements arranged toward subscanning, is driven with the read-in pulse (c) of the read-in head drive circuit 12, picking up the video signal output sequentially and serially. This video signal output is made to binary number with the amplifier 14 and binary circuit 15 into video signal (a). Further, the video signal (e or e') haing a given line density according to the sampling pulse from the video signal (a) is picked up from the video signal pick up circuit 16.
COPYRIGHT: (C)1979,JPO&Japio
JP2155878A 1978-02-28 1978-02-28 Line density selection system for reader for video information Granted JPS54114918A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2155878A JPS54114918A (en) 1978-02-28 1978-02-28 Line density selection system for reader for video information

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2155878A JPS54114918A (en) 1978-02-28 1978-02-28 Line density selection system for reader for video information

Publications (2)

Publication Number Publication Date
JPS54114918A true JPS54114918A (en) 1979-09-07
JPS6117386B2 JPS6117386B2 (en) 1986-05-07

Family

ID=12058327

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2155878A Granted JPS54114918A (en) 1978-02-28 1978-02-28 Line density selection system for reader for video information

Country Status (1)

Country Link
JP (1) JPS54114918A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58196759A (en) * 1982-05-12 1983-11-16 Canon Inc Original picture reader
JPS6046659A (en) * 1983-08-25 1985-03-13 Konishiroku Photo Ind Co Ltd Picture reader of film
JPS6046660A (en) * 1983-08-25 1985-03-13 Konishiroku Photo Ind Co Ltd Picture reader of film
JPS6096956A (en) * 1983-10-31 1985-05-30 Konishiroku Photo Ind Co Ltd Film picture reader
JPS6333971A (en) * 1986-07-29 1988-02-13 Nec Corp Picture signal processing circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6434394U (en) * 1987-08-26 1989-03-02

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58196759A (en) * 1982-05-12 1983-11-16 Canon Inc Original picture reader
JPS6046659A (en) * 1983-08-25 1985-03-13 Konishiroku Photo Ind Co Ltd Picture reader of film
JPS6046660A (en) * 1983-08-25 1985-03-13 Konishiroku Photo Ind Co Ltd Picture reader of film
JPH0515097B2 (en) * 1983-08-25 1993-02-26 Konishiroku Photo Ind
JPS6096956A (en) * 1983-10-31 1985-05-30 Konishiroku Photo Ind Co Ltd Film picture reader
JPH0469470B2 (en) * 1983-10-31 1992-11-06 Konishiroku Photo Ind
JPS6333971A (en) * 1986-07-29 1988-02-13 Nec Corp Picture signal processing circuit

Also Published As

Publication number Publication date
JPS6117386B2 (en) 1986-05-07

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