White balance device

  • Inventors: HIEDA TERUO
  • Assignees: Canon Inc
  • Publication Date: November 30, 1988
  • Publication Number: JP-S63292792-A

Abstract

PURPOSE: To attain a stable and highly accurate white balance by providing a variable processing part for processing a detecting signal from a color temperature detecting means based on a time signal and controlling the gain of a chrominance signal by a signal from the variable processing part. CONSTITUTION: The titled device is provided with a control signal generating part 7 for generating a control signal SC from the control signal of a camera which is not shown and the signals of the respective parts of a camera, a time signal generating part 8 for generating a time signal changing according to a time based on the control signal SC and the varying and processing part 6 for processing the detecting signal from the color temperature detecting means 5 based on the time signal from the time signal generating part to contral the gain of the chrominance signal of a process part 3 by the signal from the variable processing part 6. Thereby, the stable and highly accurate white balance adjustment can be executed even to the change in the status of a photographing. COPYRIGHT: (C)1988,JPO&Japio

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Patent Citations (2)

    Publication numberPublication dateAssigneeTitle
    JP-S61109277-UJuly 10, 1986
    JP-S61238191-AOctober 23, 1986Canon IncWhite balance adjusting device

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Cited By (2)

    Publication numberPublication dateAssigneeTitle
    EP-0467685-A2January 22, 1992Mitsubishi Denki Kabushiki KaishaAutomatic white-balance controlling apparatus
    EP-0467685-B1January 08, 1997Mitsubishi Denki Kabushiki KaishaAutomatic white-balance controlling apparatus