Imagick::normalizeImage
PHP function
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(PECL imagick 2, PECL imagick 3)
Enhances the contrast of a color image
Description
Imagick::normalizeImage(int $channel = Imagick::CHANNEL_DEFAULT): bool
Enhances the contrast of a color image by adjusting the pixels color to span the entire range of colors available.
Parameters
channelProvide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Refer to this list of channel constants.
Return Values
Success
Examples
php
<?php
function normalizeImage($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();
}
?>