JPS5724167A - Picture information processor - Google Patents

Picture information processor

Info

Publication number
JPS5724167A
JPS5724167A JP9830480A JP9830480A JPS5724167A JP S5724167 A JPS5724167 A JP S5724167A JP 9830480 A JP9830480 A JP 9830480A JP 9830480 A JP9830480 A JP 9830480A JP S5724167 A JPS5724167 A JP S5724167A
Authority
JP
Japan
Prior art keywords
signal
illumination
level
circuit
inputted
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
JP9830480A
Other languages
Japanese (ja)
Other versions
JPH0119311B2 (en
Inventor
Yukihiko Ogata
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP9830480A priority Critical patent/JPS5724167A/en
Publication of JPS5724167A publication Critical patent/JPS5724167A/en
Publication of JPH0119311B2 publication Critical patent/JPH0119311B2/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
    • H04N1/40—Picture signal circuits
    • H04N1/401—Compensating positionally unequal response of the pick-up or reproducing head

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Image Input (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE:To eliminate unstable element of lighting due to uneven lighting and flicker, by eliminating the changing part accompanied with the change in the illumination of lighting out of a video information. CONSTITUTION:A main set signal inputted from a terminal 16b sets an FF19, a clock signal inputted from a terminal 16a is counted at a counter 17, and the count value counts the number of clocks corresponding to the number of bits of an illumination signal, then a comparator 18 resets the FFs 19, 20. The enable signal of the FF19 operates a peak hold circuit 21. Since the circuit 21 controls an AGC circuit 23 so that the succeeding illumination signal level can be arranged to the level of the 1st illumination signal level present at the beginning of the main scanning, the level of the video signal is controlled to the rate corresponding to it. The enable signal of the FF20 is inputted to the circuit 23 and an inverter 22 and an analog switch 24 is controlled to output a video signal.
JP9830480A 1980-07-18 1980-07-18 Picture information processor Granted JPS5724167A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9830480A JPS5724167A (en) 1980-07-18 1980-07-18 Picture information processor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9830480A JPS5724167A (en) 1980-07-18 1980-07-18 Picture information processor

Publications (2)

Publication Number Publication Date
JPS5724167A true JPS5724167A (en) 1982-02-08
JPH0119311B2 JPH0119311B2 (en) 1989-04-11

Family

ID=14216178

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9830480A Granted JPS5724167A (en) 1980-07-18 1980-07-18 Picture information processor

Country Status (1)

Country Link
JP (1) JPS5724167A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60127874A (en) * 1983-12-14 1985-07-08 Fuji Xerox Co Ltd Original reader
JPS61125271A (en) * 1984-11-21 1986-06-12 Canon Inc Original reading device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5334422A (en) * 1976-09-11 1978-03-31 Hitachi Ltd Photo electric converter
JPS5453918A (en) * 1977-10-07 1979-04-27 Ricoh Co Ltd Stablizing method of video signal
JPS54114919A (en) * 1978-02-28 1979-09-07 Ricoh Co Ltd Reader for video information

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5334422A (en) * 1976-09-11 1978-03-31 Hitachi Ltd Photo electric converter
JPS5453918A (en) * 1977-10-07 1979-04-27 Ricoh Co Ltd Stablizing method of video signal
JPS54114919A (en) * 1978-02-28 1979-09-07 Ricoh Co Ltd Reader for video information

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60127874A (en) * 1983-12-14 1985-07-08 Fuji Xerox Co Ltd Original reader
JPS61125271A (en) * 1984-11-21 1986-06-12 Canon Inc Original reading device

Also Published As

Publication number Publication date
JPH0119311B2 (en) 1989-04-11

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