White balance from a gray point: the color (sRGB-encoded, 0-1) of something in the picture that should be neutral gray. Pixels of that color become gray and white keeps its brightness. Take it from the image with sampleColor.
sampleColor
Optional
Red of the gray point. Default 0.5.
Green of the gray point. Default 0.5.
Blue of the gray point. Default 0.5.
White balance from a gray point: the color (sRGB-encoded, 0-1) of something in the picture that should be neutral gray. Pixels of that color become gray and white keeps its brightness. Take it from the image with
sampleColor.