(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.
Возвращает TRUE в случае успешного завершения или FALSE в случае возникновения ошибки.
Пример #1 imagegammacorrect() usage
<?php// Create image instance$im = imagecreatefromgif('php.gif');// Correct gamma, out = 1.537imagegammacorrect($im, 1.0, 1.537);// Save and free imageimagegif($im, './php_gamma_corrected.gif');imagedestroy($im);?>