JPS5726976A - Automatic white balance adjusting circuit for color video camera - Google Patents

Automatic white balance adjusting circuit for color video camera

Info

Publication number
JPS5726976A
JPS5726976A JP10130780A JP10130780A JPS5726976A JP S5726976 A JPS5726976 A JP S5726976A JP 10130780 A JP10130780 A JP 10130780A JP 10130780 A JP10130780 A JP 10130780A JP S5726976 A JPS5726976 A JP S5726976A
Authority
JP
Japan
Prior art keywords
white balance
color temperature
incident light
balance adjusting
video camera
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
JP10130780A
Other languages
Japanese (ja)
Inventor
Michio Ogimoto
Kentaro Hanma
Kaoru Yanagawa
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP10130780A priority Critical patent/JPS5726976A/en
Publication of JPS5726976A publication Critical patent/JPS5726976A/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
    • H04N23/84—Camera processing pipelines; Components thereof for processing colour signals
    • H04N23/88—Camera processing pipelines; Components thereof for processing colour signals for colour balance, e.g. white-balance circuits or colour temperature control

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Color Television Image Signal Generators (AREA)

Abstract

PURPOSE:To prevent the distortion of white balance when an incident light is interrupted, by fixing the white balance to a predetermined balance, when an incident light amount to a color temperature detector is a given value or lower. CONSTITUTION:When a color temperature signal exceeds a threshold voltage level, it is regarded as malfunction, an electronic switch 15 is controlled with a voltage level comparator 14 and a set voltage generator 13 is connected to a control generator 6. As a result, since a set voltage from a set voltage generator 13 is used, white balance adjusting state corresponding to the color temperature represented with this voltage is obtained. Thus, even if malfunction is caused by the interruption of incident light to the color temperature detector 5, a picture with color tone in almost average white balance can be reproduced stably.
JP10130780A 1980-07-25 1980-07-25 Automatic white balance adjusting circuit for color video camera Pending JPS5726976A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10130780A JPS5726976A (en) 1980-07-25 1980-07-25 Automatic white balance adjusting circuit for color video camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10130780A JPS5726976A (en) 1980-07-25 1980-07-25 Automatic white balance adjusting circuit for color video camera

Publications (1)

Publication Number Publication Date
JPS5726976A true JPS5726976A (en) 1982-02-13

Family

ID=14297146

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10130780A Pending JPS5726976A (en) 1980-07-25 1980-07-25 Automatic white balance adjusting circuit for color video camera

Country Status (1)

Country Link
JP (1) JPS5726976A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60253935A (en) * 1984-05-31 1985-12-14 Matsushita Electric Ind Co Ltd Color camera
JPS60253936A (en) * 1984-05-31 1985-12-14 Matsushita Electric Ind Co Ltd Color camera
US4616253A (en) * 1982-06-02 1986-10-07 Nippon Kogaku K.K. White balance control apparatus for color video cameras
US4739392A (en) * 1986-01-07 1988-04-19 Victor Company Of Japan, Ltd. White balance adjusting apparatus having a plurality of standard color references automatically selected by the detected color temperature
US4774564A (en) * 1986-09-09 1988-09-27 Fuji Photo Film Co., Ltd. Electronic still camera for compensating color temperature dependency of color video signals
US4879591A (en) * 1986-01-31 1989-11-07 Canon Kabushiki Kaisha Image pickup apparatus compensating an image signal for variations in color temperature
US5099316A (en) * 1987-05-30 1992-03-24 Canon Kabushiki Kaisha White balance adjusting device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4616253A (en) * 1982-06-02 1986-10-07 Nippon Kogaku K.K. White balance control apparatus for color video cameras
JPS60253935A (en) * 1984-05-31 1985-12-14 Matsushita Electric Ind Co Ltd Color camera
JPS60253936A (en) * 1984-05-31 1985-12-14 Matsushita Electric Ind Co Ltd Color camera
US4739392A (en) * 1986-01-07 1988-04-19 Victor Company Of Japan, Ltd. White balance adjusting apparatus having a plurality of standard color references automatically selected by the detected color temperature
US4879591A (en) * 1986-01-31 1989-11-07 Canon Kabushiki Kaisha Image pickup apparatus compensating an image signal for variations in color temperature
US4774564A (en) * 1986-09-09 1988-09-27 Fuji Photo Film Co., Ltd. Electronic still camera for compensating color temperature dependency of color video signals
US5099316A (en) * 1987-05-30 1992-03-24 Canon Kabushiki Kaisha White balance adjusting device

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