The 5th Annual China PHP Conference


(PECL imagick 2.0.0)

Imagick::normalizeImageEnhances the contrast of a color image


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.



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.

Valorile întoarse

Întoarce TRUE în caz de succes.


Example #1 Imagick::normalizeImage()

function normalizeImage($imagePath$channel) {
$imagick = new \Imagick(realpath($imagePath));
$original = clone $imagick;
$original->cropimage($original->getImageWidth() / 2$original->getImageHeight(), 00);
$imagick->compositeimage($original, \Imagick::COMPOSITE_ATOP00);
header("Content-Type: image/jpg");


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