Imagick::separateImageChannel
(PECL imagick 2.0.0)
Imagick::separateImageChannel — Separates a channel from the image
설명
bool Imagick::separateImageChannel
( int
$channel
)Separates a channel from the image and returns a grayscale image. A channel is a particular color component of each pixel in the image.
인수
-
channel -
Which 'channel' to return. For colorspaces other than RGB, you can still use the CHANNEL_RED, CHANNEL_GREEN, CHANNEL_BLUE constants to indicate the 1st, 2nd and 3rd channels.
반환값
성공시에 TRUE를 반환합니다.
오류/예외
오류시에 ImagickException이 발생합니다.
예제
Example #1 Imagick::separateImageChannel()
<?php
function separateImageChannel($imagePath, $channel) {
$imagick = new \Imagick(realpath($imagePath));
$imagick->separateimagechannel($channel);
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
separateImageChannel($imagePath, \Imagick::CHANNEL_GREEN);
?>
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