Gmagick::separateimagechannel
Separates a channel from the image
Description
public Gmagick Gmagick::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.
Parameters
-
channel
-
One of the Channel constant
(
Gmagick::CHANNEL_*).
Return Values
The Gmagick object.
Errors/Exceptions
Throws an
GmagickException on error.