JPS55162669A - Shading of video signal and gain correction circuit - Google Patents

Shading of video signal and gain correction circuit

Info

Publication number
JPS55162669A
JPS55162669A JP7063679A JP7063679A JPS55162669A JP S55162669 A JPS55162669 A JP S55162669A JP 7063679 A JP7063679 A JP 7063679A JP 7063679 A JP7063679 A JP 7063679A JP S55162669 A JPS55162669 A JP S55162669A
Authority
JP
Japan
Prior art keywords
video signal
shading
envelope
gain correction
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
JP7063679A
Other languages
Japanese (ja)
Inventor
Tetsuya Sakaguchi
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.)
Kowa Co Ltd
Original Assignee
Kowa 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 Kowa Co Ltd filed Critical Kowa Co Ltd
Priority to JP7063679A priority Critical patent/JPS55162669A/en
Publication of JPS55162669A publication Critical patent/JPS55162669A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/80—Camera processing pipelines; Components thereof
    • H04N23/81—Camera processing pipelines; Components thereof for suppressing or minimising disturbance in the image signal generation

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE:To perform the shading and gain correction with a simple constitution, by detecting the envelope of video signal and dividing the video signal with this envelope signal. CONSTITUTION:After amplifying the video signal (a) from the pick up unit 3 at the amplifier 4, it is fed to the envelope detection circuit 5 to form the envelope signal (b). This envelope signal (b) can almost be regarded as the expression of shading. This envelope signal (b) is fed to the division circuit 6 as a divider and the video signal (a) is fed to the division circuit 6 as a dividend for the division. As the quotient of the division, the output video signal (c) corrected for the shading is obtained at the output terminal 7.
JP7063679A 1979-06-07 1979-06-07 Shading of video signal and gain correction circuit Pending JPS55162669A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7063679A JPS55162669A (en) 1979-06-07 1979-06-07 Shading of video signal and gain correction circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7063679A JPS55162669A (en) 1979-06-07 1979-06-07 Shading of video signal and gain correction circuit

Publications (1)

Publication Number Publication Date
JPS55162669A true JPS55162669A (en) 1980-12-18

Family

ID=13437319

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7063679A Pending JPS55162669A (en) 1979-06-07 1979-06-07 Shading of video signal and gain correction circuit

Country Status (1)

Country Link
JP (1) JPS55162669A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4554583A (en) * 1982-04-09 1985-11-19 Fuji Xerox Co., Ltd. Shading correction device
JPH031761A (en) * 1989-05-30 1991-01-08 Fujitsu Ltd Picture input device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4554583A (en) * 1982-04-09 1985-11-19 Fuji Xerox Co., Ltd. Shading correction device
JPH031761A (en) * 1989-05-30 1991-01-08 Fujitsu Ltd Picture input device

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