White balance adjustment device for automatic adjustment of white balance depending on light density information signal and colour information signal from an imaging device

摘要

64 regions are set on an image sensed picture of a video camera, where each evaluating values rij, bij, and yij are 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 yij out of these evaluating values exceeds a predetermined value, the color evaluating values of the corresponding region are attenuated by a predetermined amount, in producing gain control signals regarding color difference signals. As a result, the effect of an object of high luminance towards white balance adjustment is reduced.