Imagick::normalizeImage

(PECL imagick 2.0.0)

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

Beschreibung

bool Imagick::normalizeImage ([ int $channel = Imagick::CHANNEL_ALL ] )

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

Parameter-Liste

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.

Rückgabewerte

Liefert TRUE bei Erfolg.

Beispiele

Beispiel #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();
}

?>