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    Imagick::autoLevelImage

    (PECL imagick 3 >= 3.3.0)

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

    説明

    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.

    パラメータ

    channel

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

    戻り値

    成功した場合に true を返します。

    例

    例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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