GB2086687B - Automatic video signal level control circuit - Google Patents

Automatic video signal level control circuit

Info

Publication number
GB2086687B
GB2086687B GB8122608A GB8122608A GB2086687B GB 2086687 B GB2086687 B GB 2086687B GB 8122608 A GB8122608 A GB 8122608A GB 8122608 A GB8122608 A GB 8122608A GB 2086687 B GB2086687 B GB 2086687B
Authority
GB
United Kingdom
Prior art keywords
control circuit
video signal
signal level
level control
automatic video
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.)
Expired
Application number
GB8122608A
Other versions
GB2086687A (en
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.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo 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 Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Publication of GB2086687A publication Critical patent/GB2086687A/en
Application granted granted Critical
Publication of GB2086687B publication Critical patent/GB2086687B/en
Expired 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
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/71—Circuitry for evaluating the brightness variation

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Exposure Control For Cameras (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)
GB8122608A 1980-08-26 1981-07-22 Automatic video signal level control circuit Expired GB2086687B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55117348A JPS5741079A (en) 1980-08-26 1980-08-26 Automatic television camera exposure device by division of picture

Publications (2)

Publication Number Publication Date
GB2086687A GB2086687A (en) 1982-05-12
GB2086687B true GB2086687B (en) 1985-02-06

Family

ID=14709462

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8122608A Expired GB2086687B (en) 1980-08-26 1981-07-22 Automatic video signal level control circuit

Country Status (5)

Country Link
US (1) US4409620A (en)
JP (1) JPS5741079A (en)
DE (1) DE3129356C2 (en)
FR (1) FR2495418B1 (en)
GB (1) GB2086687B (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5783971A (en) * 1980-11-13 1982-05-26 Asahi Optical Co Ltd Spot exposure control circuit
US4918538A (en) * 1982-12-14 1990-04-17 Canon Kabushiki Kashia Electronic photography system with still and motion picture modes
US4468700A (en) * 1983-03-15 1984-08-28 Lectrolarm Custom Systems, Inc. Automatic iris control lens system
JP2501782B2 (en) * 1983-09-16 1996-05-29 株式会社ニコン Image scanning device
GB8333264D0 (en) * 1983-12-13 1987-01-14 British Aerospace Imaging apparatus
US4660091A (en) * 1985-09-16 1987-04-21 Eastman Kodak Company Exposure level correction for film-to-video conversion
JPS62198278A (en) * 1986-02-26 1987-09-01 Asahi Optical Co Ltd Photometric circuit for electronic camera
JPH0789178B2 (en) * 1986-12-19 1995-09-27 オリンパス光学工業株式会社 Automatic light control device for endoscopes using an external camera
DE3643870C2 (en) * 1986-12-22 1994-11-17 Broadcast Television Syst Method and circuit for automatic exposure control of a television camera
JPH0810910B2 (en) * 1987-06-15 1996-01-31 オムロン株式会社 TV camera device for reading license plate of vehicle
AU607033B2 (en) * 1988-01-12 1991-02-21 Sanyo Electric Co., Ltd. Auto iris/gamma correction apparatus for making automatic exposure adjustment and/or automatic gamma correction in response to video signal and image sensing apparatus comprising such auto iris/gamma correction apparatus
GB2219461B (en) * 1988-05-02 1992-11-18 Canon Kk Exposure control device
CA1317493C (en) * 1988-05-11 1993-05-11 Kenichi Kikuchi Image sensing apparatus having automatic focusing function for automatically matching focus in response to video signal
CA1309166C (en) * 1988-05-20 1992-10-20 Toshinobu Haruki Image sensing apparatus having automatic iris function of automatically adjusting exposure in response to video signal
JPH031772A (en) * 1989-05-30 1991-01-08 Sony Corp Image pickup device
US5111301A (en) * 1989-06-28 1992-05-05 Sanyo Electric Co., Ltd. Automatic exposure adjusting apparatus for automatically adjusting exposure by fuzzy inference
JPH03117275A (en) * 1989-09-29 1991-05-20 Sanyo Electric Co Ltd Automatic focus camera
GB9011842D0 (en) * 1990-05-25 1990-07-18 Europ Vision Syst Centre Video image acquisition and optimization
KR930003305B1 (en) * 1991-06-19 1993-04-24 Samsung Electronics Co Ltd Iris controlling circuit
US5959668A (en) * 1996-09-26 1999-09-28 Lockheed Martin Tactical Defense Systems, Inc. Automatic exposure and gain control for a sensor using video feedback

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1241869B (en) * 1962-05-12 1967-06-08 Fernseh Gmbh Circuit arrangement to improve the detail perceptibility of a television picture
US3495037A (en) * 1965-10-27 1970-02-10 Grundig Emv Circuit arrangement for the automatic and continuous adjustment of the optical shutter of a television pick-up camera
US3576393A (en) * 1967-12-15 1971-04-27 Us Navy Automatic exposure control for a slow scan vidicon
US3555181A (en) * 1968-06-05 1971-01-12 Bell Telephone Labor Inc Automatic video level control employing iris and amplifier gain adjustments
AT329652B (en) * 1974-11-13 1976-05-25 Eumig METHOD OF CONTROLLING A TELEVISION CAMERA
JPS51131211A (en) * 1975-05-08 1976-11-15 Teac Co Video camera with automatic fading device
JPS52109826A (en) * 1976-03-11 1977-09-14 Mitsubishi Electric Corp Sensitivity control unit
DE2722055A1 (en) * 1976-05-15 1977-12-15 Elliott Brothers London Ltd OPTICAL OBSERVATION SYSTEM
JPS55121778A (en) * 1979-03-13 1980-09-19 Victor Co Of Japan Ltd Automatic controller for sensitivity of television camera

Also Published As

Publication number Publication date
GB2086687A (en) 1982-05-12
FR2495418A1 (en) 1982-06-04
JPS5741079A (en) 1982-03-06
DE3129356A1 (en) 1982-04-08
US4409620A (en) 1983-10-11
DE3129356C2 (en) 1984-10-25
FR2495418B1 (en) 1986-04-25

Similar Documents

Publication Publication Date Title
GB2086687B (en) Automatic video signal level control circuit
JPS55120257A (en) Automatic signal equalizer circuit
GB8424172D0 (en) Signal level control
GB2133943B (en) Automatic gain control circuit
GB2071959B (en) Signal pick-up circuit arrangements
EP0157598A3 (en) Device operable like an automatic level control circuit for decoding a multivalued signal
DE3170631D1 (en) Automatic frequency control system
JPS56155405A (en) Automatic electronic control mechanism
DE3165109D1 (en) Signal comparison circuit
JPS5558680A (en) Video tube bias automatic control circuit
GB2023906B (en) Automatic recording level controlling circuit
GB2075729B (en) Microprogramm control circuit
GB2021884A (en) Automatic signal attenuation circuit
GB2083318B (en) Video signal processing circuit
GB2097222B (en) Automatic video signal peaking control
DE3379857D1 (en) Automatic level control circuit
GB2083981B (en) Control signal multiplex circuit
DE3169057D1 (en) Video tone control circuit
GB2075303B (en) Video signal reproducing circuits
DE3072119D1 (en) Control circuit
GB8413243D0 (en) Control circuit for television signal
AU566526B2 (en) Kinescope automatic bias control sensing circuit
DE3469397D1 (en) Automatic gain control circuit
JPS56101342A (en) Automatic selection synchronizer circuit
JPS5792279A (en) Control board for automatic operation of shutter

Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee