(PHP 4, PHP 5)
imagegammacorrect — Apply a gamma correction to a GD image
Applies gamma correction to the given gd image given an input and an output gamma.
An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
The input gamma.
The output gamma.
Retorna TRUE em caso de sucesso ou FALSE em falhas.
Exemplo #1 imagegammacorrect() usage
<?php
// Create image instance
$im = imagecreatefromgif('php.gif');
// Correct gamma, out = 1.537
imagegammacorrect($im, 1.0, 1.537);
// Save and free image
imagegif($im, './php_gamma_corrected.gif');
imagedestroy($im);
?>