Gmagick::modulateimage
(PECL gmagick >= Unknown)
Gmagick::modulateimage — Control the brightness, saturation, and hue
Description
public void Gmagick::modulateimage
( float $brightness
, float $saturation
, float $hue
)
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.