Television – Camera – system and detail – Combined image signal generator and general image signal...
Patent
1990-11-13
1994-01-25
Groody, James J.
Television
Camera, system and detail
Combined image signal generator and general image signal...
H04N 973
Patent
active
052820220
ABSTRACT:
Sixty-four regions are established on an image sensed picture from a video camera, where each evaluating value r.sub.ij, b.sub.ij, and y.sub.ij is obtained by averaging color difference signals R-Y and B-Y and luminance signal Y obtained from an image sensed signal over 1 field period for each region. When determination is made that luminance evaluating value y.sub.ij out of these evaluating values exceeds a predetermined value, the color evaluating values of the corresponding region are attenuated by a predetermined amount, in response to gain control signals derived from the color difference signals. As a result, the effect of an object of high luminance towards white balance adjustment is reduced.
REFERENCES:
patent: 4709259 (1987-11-01), Suzuki
patent: 4750032 (1988-06-01), Nakayama
patent: 4809061 (1989-02-01), Suzuki
patent: 4829382 (1989-05-01), Hess et al.
patent: 4954884 (1990-09-01), Nakayama et al.
patent: 5049997 (1991-09-01), Arai
Haruki Toshinobu
Kikuchi Kenichi
Groody James J.
Michaelson Peter L.
Moser, Jr. Raymond R.
Murrell Jeffrey S.
Sanyo Electric Co,. Ltd.
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