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Imagick::normalizeImage

(PECL imagick 2, PECL imagick 3)

Imagick::normalizeImage — Enhances the contrast of a color image

Descrizione

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

Enhances the contrast of a color image by adjusting the pixels color to span the entire range of colors available.

Elenco dei parametri

channel: Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Refer to this list of channel constants.

Valori restituiti

Restituisce true in caso di successo.

Esempi

Example #1 Imagick::normalizeImage()

<?php
function normalizeImage($imagePath, $channel) {
    $imagick = new \Imagick(realpath($imagePath));
    $original = clone $imagick;
    $original->cropimage($original->getImageWidth() / 2, $original->getImageHeight(), 0, 0);
    $imagick->normalizeImage($channel);
    $imagick->compositeimage($original, \Imagick::COMPOSITE_ATOP, 0, 0);
    header("Content-Type: image/jpg");
    echo $imagick->getImageBlob();
}

?>

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