| 摘要 |
PURPOSE:To adjust white balance automatically without using any white reflecting late, etc., for adjustment and to remove the difference in color balance among cameras by measuring color temperature information on circumferential light, receiving the information and generating a white balance control signal, and supplying the control signal to variable gain amplifiers of plural cameras. CONSTITUTION:The color temperature information obtained by a color temperature measuring instrument 2 is supplied to a transmission unit 4 at intervals of several seconds and converted to an audio signal band and then supplied to the input terminal 6 of a camera 1-1 or an automatic color temperature correction unit 8. Their switching is carried out with the changeover switch of the unit 4. The unit 8 is stored with white balance adjustment data on cameras 1-1-1-8 and the quantity of correction is calculated on the basis of said data and said color temperature information and supplied to the variable gain amplifiers of the respective cameras through camera control unit 9-1-9-8 to adjust the white balance automatically.
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