Imagick::autoLevelImage()

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Description

说明

publicImagick::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.

参数

$channel

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

返回值

成功时返回TRUE。

范例

Example #1 Imagick::autoLevelImage()

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