Amount by which to boost (or 'unboost') colors in the image. 1.0 corresponds
to no change, < 1.0 decreases saturation and brightness, > 1.0 increases saturation and brightness.
This method increases saturation, brightness and contrast of the image.
Amount by which to boost (or 'unboost') colors in the image. 1.0 corresponds
to no change, < 1.0 decreases saturation and brightness, > 1.0 increases saturation and brightness.
Remarks
Use this method if you need a simple way to make old and faded images look more vivid.