Gmagick::separateimagechannel
(PECL gmagick >= Unknown)
Gmagick::separateimagechannel — Separates a channel from the image
Description
public Gmagick::separateimagechannel(int $channel): Gmagick
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.
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https://www.php.net/manual/en/gmagick.separateimagechannel.php
