imagegammacorrect

(PHP 4, PHP 5)

imagegammacorrect — Apply a gamma correction to a GD image

bool imagegammacorrect ( resource $image , float $inputgamma , float $outputgamma )

Applies gamma correction to the given gd image given an input and an output gamma.

image: An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
inputgamma: The input gamma
outputgamma: The output gamma

Returns TRUE on success or FALSE on failure.