public Gmagick Gmagick::modulateimage    ( float $brightness   , float $saturation   , float $hue   )

Gmagick::modulateimageControl the brightness, saturation, and hue

brightness

The percent change in brighness (-100 thru +100).

saturation

The percent change in saturation (-100 thru +100)

hue

The percent change in hue (-100 thru +100)