JPS5742275A - Dark current correcting method for ccd sensor - Google Patents

Dark current correcting method for ccd sensor

Info

Publication number
JPS5742275A
JPS5742275A JP55118591A JP11859180A JPS5742275A JP S5742275 A JPS5742275 A JP S5742275A JP 55118591 A JP55118591 A JP 55118591A JP 11859180 A JP11859180 A JP 11859180A JP S5742275 A JPS5742275 A JP S5742275A
Authority
JP
Japan
Prior art keywords
dark current
period
ccd sensor
signal
circuit
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
JP55118591A
Other languages
Japanese (ja)
Inventor
Norio Kanemitsu
Shiyouji Takahashi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP55118591A priority Critical patent/JPS5742275A/en
Publication of JPS5742275A publication Critical patent/JPS5742275A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
    • H04N25/63—Noise processing, e.g. detecting, correcting, reducing or removing noise applied to dark current

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Light Receiving Elements (AREA)
  • Solid State Image Pick-Up Elements (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)

Abstract

PURPOSE:To correct the dark current of a CCD sensor, by taking difference between the dark current stored at the 1st period and a signal obtained throgh the readout and scanning at the 2nd period. CONSTITUTION:The output of a CCD sensor is read out at the 1st part period of A, while a shutter 3 is closed, and it is digitized at an A/D converter 5 and stored in a memory circuit 6. At the 2nd part B, the shutter 3 is opened and an objective 4 is scanned and the signal from the CCD sensor 1 is read out. The signal in this case is a video signal of the objective 4 superimposed on the dark current. The signal read out at the period B is digitized at the circuit 5 and given to a differential circuit 7. A signal read out at the period A stored from the circuit 6 is given to the circuit 7, and the difference between them is taken to obtain the video signal for one scanning period's share with the corrected dark current.
JP55118591A 1980-08-28 1980-08-28 Dark current correcting method for ccd sensor Pending JPS5742275A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55118591A JPS5742275A (en) 1980-08-28 1980-08-28 Dark current correcting method for ccd sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55118591A JPS5742275A (en) 1980-08-28 1980-08-28 Dark current correcting method for ccd sensor

Publications (1)

Publication Number Publication Date
JPS5742275A true JPS5742275A (en) 1982-03-09

Family

ID=14740369

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55118591A Pending JPS5742275A (en) 1980-08-28 1980-08-28 Dark current correcting method for ccd sensor

Country Status (1)

Country Link
JP (1) JPS5742275A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6035883A (en) * 1983-08-05 1985-02-23 Nippon Kogaku Kk <Nikon> Electronic still camera
JPS6171776A (en) * 1984-09-17 1986-04-12 Canon Inc Image pickup device
JPS6295074A (en) * 1985-10-21 1987-05-01 Mitsubishi Electric Corp Picture quality improving device
US6977364B2 (en) 2003-07-28 2005-12-20 Asml Holding N.V. System and method for compensating for dark current in photosensitive devices

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55104174A (en) * 1979-02-05 1980-08-09 Nec Corp Solidstate pick up unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55104174A (en) * 1979-02-05 1980-08-09 Nec Corp Solidstate pick up unit

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6035883A (en) * 1983-08-05 1985-02-23 Nippon Kogaku Kk <Nikon> Electronic still camera
JPS6171776A (en) * 1984-09-17 1986-04-12 Canon Inc Image pickup device
JPH0533588B2 (en) * 1984-09-17 1993-05-19 Canon Kk
JPS6295074A (en) * 1985-10-21 1987-05-01 Mitsubishi Electric Corp Picture quality improving device
JPH0374998B2 (en) * 1985-10-21 1991-11-28
US6977364B2 (en) 2003-07-28 2005-12-20 Asml Holding N.V. System and method for compensating for dark current in photosensitive devices
US7081610B2 (en) 2003-07-28 2006-07-25 Asml Holding N.V. System for compensating for dark current in sensors

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