JPS6439171A - Image pickup device - Google Patents

Image pickup device

Info

Publication number
JPS6439171A
JPS6439171A JP62194406A JP19440687A JPS6439171A JP S6439171 A JPS6439171 A JP S6439171A JP 62194406 A JP62194406 A JP 62194406A JP 19440687 A JP19440687 A JP 19440687A JP S6439171 A JPS6439171 A JP S6439171A
Authority
JP
Japan
Prior art keywords
fixed pattern
sensor
pattern noise
output signal
amplifier
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
JP62194406A
Other languages
Japanese (ja)
Inventor
Shunpei Tanaka
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.)
Olympus Corp
Original Assignee
Olympus Optical 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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP62194406A priority Critical patent/JPS6439171A/en
Publication of JPS6439171A publication Critical patent/JPS6439171A/en
Pending legal-status Critical Current

Links

Landscapes

  • Picture Signal Circuits (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)

Abstract

PURPOSE:To increase an image pickup light quantity area by correcting a signal corresponding to fixed pattern noise in response to the lightness of a subject and therefore eliminating effectively the fixed pattern noise component regardless of the lightness of the subject. CONSTITUTION:A shutter 3 is closed and the photoelectric transducing surface of an image sensor 2 becomes dark with switches S1 and S2 switched to the side opposite to that shown in a diagram. In this case, the output signal received from the sensor 2 is stored in a frame memory 4 via a differential amplifier 5. Then the signal corresponding to the fixed pattern noise read out of the memory 4 is inputted to a variable gain amplifier 10 and corrected in accordance with the output signal of the sensor 2. The output signal of the amplifier 10 is applied to the amplifier 5 simultaneously with the output signal of the sensor 2 that photographed an actual subject. The difference signal of both output signals is outputted. Then the video signals corresponding to only an optical image free from the fixed pattern noise is outputted via a process circuit 7.
JP62194406A 1987-08-05 1987-08-05 Image pickup device Pending JPS6439171A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62194406A JPS6439171A (en) 1987-08-05 1987-08-05 Image pickup device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62194406A JPS6439171A (en) 1987-08-05 1987-08-05 Image pickup device

Publications (1)

Publication Number Publication Date
JPS6439171A true JPS6439171A (en) 1989-02-09

Family

ID=16324073

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62194406A Pending JPS6439171A (en) 1987-08-05 1987-08-05 Image pickup device

Country Status (1)

Country Link
JP (1) JPS6439171A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0715632A (en) * 1993-06-22 1995-01-17 Nec Corp Fixed pattern noise eliminating circuit for solid state image pickup camera
US9325911B2 (en) 2013-08-08 2016-04-26 Canon Kabushiki Kaisha Image capturing apparatus and method of controlling the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0715632A (en) * 1993-06-22 1995-01-17 Nec Corp Fixed pattern noise eliminating circuit for solid state image pickup camera
US9325911B2 (en) 2013-08-08 2016-04-26 Canon Kabushiki Kaisha Image capturing apparatus and method of controlling the same

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