Gmagick::modulateimage
(PECL gmagick >= Unknown)
Gmagick::modulateimage — Control the brightness, saturation, and hue
Description
public Gmagick::modulateimage ( float $brightness , float $saturation , float $hue ) : Gmagick
Lets you control the brightness, saturation, and hue of an image. Hue is the percentage of absolute rotation from the current position. For example 50 results in a counter-clockwise rotation of 90 degrees, 150 results in a clockwise rotation of 90 degrees, with 0 and 200 both resulting in a rotation of 180 degrees.
Parameters
-
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)
Return Values
The Gmagick object on success
Errors/Exceptions
Throws an GmagickException on error.
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https://www.php.net/manual/en/gmagick.modulateimage.php