Television – Camera – system and detail – Combined image signal generator and general image signal...
Patent
1992-07-10
1995-03-14
Groody, James J.
Television
Camera, system and detail
Combined image signal generator and general image signal...
348228, 348265, 348270, 348277, H04N 973, H04N 904
Patent
active
053980581
ABSTRACT:
A filter member which can alternatively arrange a proper one of a plurality of kinds of color temperature converting filters onto an optical axis of an image pickup device is provided and the driver of the filter member is controlled by using a plurality of color signals which are generated from the image pickup device, so that a proper color temperature converting filter can always be used. An adjusting mechanism for adjusting relative gains of a plurality of color signals which are generated from the image pickup device is further provided. By also adjusting the adjusting mechanism by using a plurality of color signals which are generated from the image pickup device, an automatic white balance control in a wide color temperature range can be accomplished.
REFERENCES:
patent: 4355325 (1982-10-01), Nakamura et al.
patent: 4851899 (1989-07-01), Yoshida
patent: 5016091 (1991-05-01), Choi
patent: 5046162 (1991-09-01), Ishikawa
patent: 5053871 (1991-10-01), Ogawa
patent: 5155585 (1992-10-01), Ishikawa
European Patent Office: Patent Abstracts of Japan, Publication #: JP59215189, Date: May 12, 1984.
Canon Kabushiki Kaisha
Groody James J.
Hsia Sherrie
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