Php/docs/imagick.separateimagechannel
From Get docs
Imagick::separateImageChannel
(PECL imagick 2, PECL imagick 3)
Imagick::separateImageChannel — Separates a channel from the image
Description
public Imagick::separateImageChannel
( int $channel
) : bool
Separates a channel from the image and returns a grayscale image. A channel is a particular color component of each pixel in the image.
Parameters
channel- Which 'channel' to return. For colorspaces other than RGB, you can still use the CHANNEL_RED, CHANNEL_GREEN, CHANNEL_BLUE constants to indicate the 1st, 2nd and 3rd channels.
Return Values
Returns TRUE on success.
Errors/Exceptions
Throws ImagickException on error.
Examples
Example #1 Imagick::separateImageChannel()
<?phpfunction separateImageChannel($imagePath, $channel) { $imagick = new \Imagick(realpath($imagePath)); $imagick->separateimagechannel($channel); header("Content-Type: image/jpg"); echo $imagick->getImageBlob();}separateImageChannel($imagePath, \Imagick::CHANNEL_GREEN);?>
