JPS56161777A - Facsimile device - Google Patents

Facsimile device

Info

Publication number
JPS56161777A
JPS56161777A JP6572480A JP6572480A JPS56161777A JP S56161777 A JPS56161777 A JP S56161777A JP 6572480 A JP6572480 A JP 6572480A JP 6572480 A JP6572480 A JP 6572480A JP S56161777 A JPS56161777 A JP S56161777A
Authority
JP
Japan
Prior art keywords
photoelectric conversion
output signal
signal
dispersion
read
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
JP6572480A
Other languages
Japanese (ja)
Inventor
Tsunetoshi Nishimoto
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP6572480A priority Critical patent/JPS56161777A/en
Publication of JPS56161777A publication Critical patent/JPS56161777A/en
Pending 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)
  • Image Input (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE:To enable to compensate the dispersion of performance of each photoelectric conversion elements, by reading in standard black and white signals in advance, storing the output level, and adjusting the amplification factor and subtracting DC component based on the signals. CONSTITUTION:Before reading in an actual original, a standard black signal (e.g., distinguished state of light source) is read in as the 1st step, and a standard white signal is read in as the 2nd step, and the output signal of each photoelectric conversion element at these steps is stored in a storage circuit 8. Further, the output signal of each element of the 1st step mentioned before is subtracted at a DC component subtraction circuit 5 and the amplification factor of a variable amplifying circuit 6 is changed so as to keep the level of the output signal of each element of the 2nd step constant. Thus, the dispersion of the performance of each photoelectric conversion element of a multi-image sensor arranged in array shape is completely compensated.
JP6572480A 1980-05-16 1980-05-16 Facsimile device Pending JPS56161777A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6572480A JPS56161777A (en) 1980-05-16 1980-05-16 Facsimile device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6572480A JPS56161777A (en) 1980-05-16 1980-05-16 Facsimile device

Publications (1)

Publication Number Publication Date
JPS56161777A true JPS56161777A (en) 1981-12-12

Family

ID=13295244

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6572480A Pending JPS56161777A (en) 1980-05-16 1980-05-16 Facsimile device

Country Status (1)

Country Link
JP (1) JPS56161777A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01201778A (en) * 1988-02-08 1989-08-14 Kubota Ltd Image-pickup type boundary detecting device
US6912003B1 (en) * 1997-07-07 2005-06-28 Institute For Mikroelektronik Methods of and circuit array for compensating variations induced by temperature strain and manufacture in CMOS video sensors

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01201778A (en) * 1988-02-08 1989-08-14 Kubota Ltd Image-pickup type boundary detecting device
US6912003B1 (en) * 1997-07-07 2005-06-28 Institute For Mikroelektronik Methods of and circuit array for compensating variations induced by temperature strain and manufacture in CMOS video sensors

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