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The video image turns bluish (as the left picture below).
The higher the Bgain value, the bluer the image will be. To solve the
problem, reduce the Bgain value, and the video image will become less
blue.
The video image turns yellowish (as the left picture below).
The lower the Bgain value, the yellower the image will be. To solve the
problem, increase the Bgain value, and the video image will become
less yellow.
The following image displays the general color shifts of the scene when different
Rgain/Bgain combinations are applied.