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このドキュメントでは、 php中国語ネットマニュアル リリース
(PECL imagick 2.0.0)
Imagick::separateImageChannel — Separates a channel from the image
$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.
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.
成功时返回 TRUE
。
错误时抛出 ImagickException。
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 );
?>