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Imagick::autoLevelImage

PHP function Edit on GitHub ✎

(PECL imagick 3 >= 3.3.0)

Adjusts the levels of a particular image channel

Description

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

Success

Examples

Imagick::autoLevelImage()

php

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

?>

Source: reference/imagick/imagick/autolevelimage.xml · from the official PHP manual (php/doc-en)