(Информация о версии неизвестна, возможно, только в SVN)
Imagick::autoLevelImage — Description
$CHANNEL
= Imagick::CHANNEL_DEFAULT
] )Adjusts the levels of a particular image channel by scaling the minimum and maximum values to the full quantum range.
CHANNEL
Which channel should the auto-levelling should be done on.
Пример #1 Imagick::autoLevelImage()
<?php
function autoLevelImage($imagePath) {
$imagick = new \Imagick(realpath($imagePath));
$imagick->autoLevelImage();
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>