Adjusts the levels of a particular image channel

# Imagick::autoLevelImage

(PECL imagick 3 >= 3.3.0)

Imagick::autoLevelImage — Adjusts the levels of a particular image channel

### Beschreibung

public function 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.

### Parameter-Liste

`channel`

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

### Rückgabewerte

Liefert `true` bei Erfolg.

### Beispiele

Beispiel #1 Imagick::autoLevelImage()

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

    ?>

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