JPS604391A - Color temperature compensating device of color television camera - Google Patents

Color temperature compensating device of color television camera

Info

Publication number
JPS604391A
JPS604391A JP11256183A JP11256183A JPS604391A JP S604391 A JPS604391 A JP S604391A JP 11256183 A JP11256183 A JP 11256183A JP 11256183 A JP11256183 A JP 11256183A JP S604391 A JPS604391 A JP S604391A
Authority
JP
Japan
Prior art keywords
color temperature
color
temperature compensation
television camera
signal
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.)
Granted
Application number
JP11256183A
Other languages
Japanese (ja)
Other versions
JPH0473355B2 (en
Inventor
Takao Kinoshita
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP11256183A priority Critical patent/JPH0473355B2/ja
Publication of JPS604391A publication Critical patent/JPS604391A/en
Publication of JPH0473355B2 publication Critical patent/JPH0473355B2/ja
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/64Circuits for processing colour signals
    • H04N9/73Circuits for processing colour signals colour balance circuits, e.g. white balance circuits, colour temperature control
    • H04N9/735Circuits for processing colour signals colour balance circuits, e.g. white balance circuits, colour temperature control for picture signal generators

Abstract

PURPOSE:To obtain a color temperature compensating device of a color television camera capable of executing more appropriate color temperature compensation, by installing plural pairs of color detectors in a photographing lens, and detecting the color temperature of incident light from an object. CONSTITUTION:Reflecting light from an object and their circumferential light detected by color detectors 31 and 32 are converted into electric signals and supplied to a color temperature detector 33 which outputs a color temperature signal. Appropriate color temperature compensation is performed by supplying the color temperature signal outputted from the detector 33 to color temperature compensating devices 34 and 35 and adjusting the gain of a variable gain amplifier 12 for a red signal and a variable gain amplifier 13 for a blue signal with the outputs of the compensating devices 34 and 35. By adding a set value for the focal distance of a photographing lens 36 detected by a detecting means (not shown in the figure) which is separately installed as an evaluating and judging element when a color temperature compensation is performed, to this stage, more appropriate color temperature compensation is executed.
JP11256183A 1983-06-22 1983-06-22 Expired JPH0473355B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11256183A JPH0473355B2 (en) 1983-06-22 1983-06-22

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11256183A JPH0473355B2 (en) 1983-06-22 1983-06-22

Publications (2)

Publication Number Publication Date
JPS604391A true JPS604391A (en) 1985-01-10
JPH0473355B2 JPH0473355B2 (en) 1992-11-20

Family

ID=14589753

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11256183A Expired JPH0473355B2 (en) 1983-06-22 1983-06-22

Country Status (1)

Country Link
JP (1) JPH0473355B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4851897A (en) * 1985-05-22 1989-07-25 Canon Kabushiki Kaisha Image pickup system having a lens assembly and means for providing information relating to the spectral characteristic of the lens assembly
US4855814A (en) * 1985-10-09 1989-08-08 Canon Kabushiki Kaisha Video camera body and detachable lens each containing a memory for storing signals indicative of spectral characteristics
JPH01119280U (en) * 1988-02-03 1989-08-11
JPH0475892U (en) * 1990-11-14 1992-07-02

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4851897A (en) * 1985-05-22 1989-07-25 Canon Kabushiki Kaisha Image pickup system having a lens assembly and means for providing information relating to the spectral characteristic of the lens assembly
US4855814A (en) * 1985-10-09 1989-08-08 Canon Kabushiki Kaisha Video camera body and detachable lens each containing a memory for storing signals indicative of spectral characteristics
JPH01119280U (en) * 1988-02-03 1989-08-11
JPH0475892U (en) * 1990-11-14 1992-07-02

Also Published As

Publication number Publication date
JPH0473355B2 (en) 1992-11-20

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