Imagick::normalizeImage
(PECL imagick 2.0.0)
Imagick::normalizeImage — Enhances the contrast of a color image
설명
bool Imagick::normalizeImage
([ int
$channel = Imagick::CHANNEL_ALL
] )Enhances the contrast of a color image by adjusting the pixels color to span the entire range of colors available.
인수
-
channel -
Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Refer to this list of channel constants.
반환값
성공시에 TRUE를 반환합니다.
예제
Example #1 Imagick::normalizeImage()
<?php
function normalizeImage($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();
}
?>
add a note
User Contributed Notes
There are no user contributed notes for this page.
