Imagick::autoLevelImage

(PECL imagick 3 >= 3.3.0)

Imagick::autoLevelImageAdjusts the levels of a particular image channel

Description

public Imagick::autoLevelImage(int $channel = Imagick::CHANNEL_DEFAULT): bool

Adjusts the levels of a particular image channel by scaling the minimum and maximum values to the full quantum range.

Parameters

channel

Which channel should the auto-levelling should be done on.

Return Values

Returns true on success.

Examples

Example #1 Imagick::autoLevelImage()

<?phpfunction autoLevelImage($imagePath) {    $imagick = new \Imagick(realpath($imagePath));    $imagick->autoLevelImage();    header("Content-Type: image/jpg");    echo $imagick->getImageBlob();}?>