https://www.php.net/manual/fr/gmagick.gammaimage.php
PHP: Gmagick::gammaimage - Manual
Corrige le gamma d'une image
phpmanual
https://www.php.net/manual/uk/gmagick.gammaimage.php
PHP: Gmagick::gammaimage - Manual
Gamma-corrects an image
phpmanual
https://www.php.net/manual/uk/imagick.gammaimage.php
PHP: Imagick::gammaImage - Manual
Gamma-corrects an image
phpimagickmanual