(PHP 4, PHP 5, PHP 7, PHP 8)
imagegammacorrect — Apply a gamma correction to a GD image
Applies gamma correction to the given gd image
given an input and an output gamma.
image
Una risorsa immagine, restituita da una delle funzioni di creazione immagine, come imagecreatetruecolor().
input_gamma
The input gamma.
output_gamma
The output gamma.
Versione | Descrizione |
---|---|
8.0.0 |
image expects a GdImage
instance now; previously, a valid gd resource was expected.
|
Example #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);
?>