JPS5713878A - Automatic white-balance regulator of color television camera - Google Patents

Automatic white-balance regulator of color television camera

Info

Publication number
JPS5713878A
JPS5713878A JP8812380A JP8812380A JPS5713878A JP S5713878 A JPS5713878 A JP S5713878A JP 8812380 A JP8812380 A JP 8812380A JP 8812380 A JP8812380 A JP 8812380A JP S5713878 A JPS5713878 A JP S5713878A
Authority
JP
Japan
Prior art keywords
color temperature
circuits
white
gate
subtracters
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
JP8812380A
Other languages
Japanese (ja)
Inventor
Shoji Nishikawa
Yoshinori Kitamura
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP8812380A priority Critical patent/JPS5713878A/en
Publication of JPS5713878A publication Critical patent/JPS5713878A/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

Abstract

PURPOSE:To operate in the fully automatic white balanced state without pushing any switch by composing the titled regulator of a device which detects the color temperature of illumination and a device which adjusts white balance automatically. CONSTITUTION:A condenser 21 condenses the external light of a visual field including an object, a color temperature detector 22 detects the color temperature of the condensed light, and a color-temperature fluctuation detector 23 discriminates whether the detected color temperature fluctuates to a prescribed extent or more. When the discrimination results show that the fluctuation exceeds the prescribed extent, a gate signal generator 24 generates a gate signal for turning on gate circuits 19 and 20. Consequently, two negative feedback loops of gain control circuit 4 and 5, detectors 6 and 7, subtracters 8 and 9, smoothing circuits 10 and 11, gate circuits 19 and 20, and storing circuits 14 and 15 are put in operation so that the outputs of the subtracters 8 and 9 are 0s. Consequently, if the color temperature of an object fluctuates during image pickup operation, the circuits 19 and 20 are turned on automatically to operate the function of adjusting white balance, thereby performing the image pickup operation in the white-balanced state.
JP8812380A 1980-06-27 1980-06-27 Automatic white-balance regulator of color television camera Pending JPS5713878A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8812380A JPS5713878A (en) 1980-06-27 1980-06-27 Automatic white-balance regulator of color television camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8812380A JPS5713878A (en) 1980-06-27 1980-06-27 Automatic white-balance regulator of color television camera

Publications (1)

Publication Number Publication Date
JPS5713878A true JPS5713878A (en) 1982-01-23

Family

ID=13934122

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8812380A Pending JPS5713878A (en) 1980-06-27 1980-06-27 Automatic white-balance regulator of color television camera

Country Status (1)

Country Link
JP (1) JPS5713878A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59174084A (en) * 1983-03-24 1984-10-02 Hitachi Ltd Color video camera
JPS60143090A (en) * 1983-12-29 1985-07-29 Matsushita Electric Ind Co Ltd Camera device
EP0159853A2 (en) * 1984-04-09 1985-10-30 Nec Corporation Color imaging apparatus
JPS62104389A (en) * 1985-10-31 1987-05-14 Nippon Tv Housoumou Kk White balance adjustment system for color television camera
US4811086A (en) * 1985-02-12 1989-03-07 Canon Kabushiki Kaisha Image sensing apparatus
US5543836A (en) * 1983-12-28 1996-08-06 Canon Kabushiki Kaisha, P.C. White balance using combined feedback and external color information for control

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59174084A (en) * 1983-03-24 1984-10-02 Hitachi Ltd Color video camera
JPH026473B2 (en) * 1983-03-24 1990-02-09 Hitachi Ltd
US5543836A (en) * 1983-12-28 1996-08-06 Canon Kabushiki Kaisha, P.C. White balance using combined feedback and external color information for control
JPS60143090A (en) * 1983-12-29 1985-07-29 Matsushita Electric Ind Co Ltd Camera device
EP0159853A2 (en) * 1984-04-09 1985-10-30 Nec Corporation Color imaging apparatus
US4700219A (en) * 1984-04-09 1987-10-13 Nec Corporation Color imaging apparatus
US4811086A (en) * 1985-02-12 1989-03-07 Canon Kabushiki Kaisha Image sensing apparatus
JPS62104389A (en) * 1985-10-31 1987-05-14 Nippon Tv Housoumou Kk White balance adjustment system for color television camera
JPH0234236B2 (en) * 1985-10-31 1990-08-02 Nippon Terebi Hosomo Kk

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