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 -
Identify which channel to extract: RedChannel, GreenChannel, BlueChannel, OpacityChannel, CyanChannel, MagentaChannel, YellowChannel, BlackChannel.
Return Values
The Gmagick object on success
Errors/Exceptions
Throws an GmagickException on error.
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https://www.php.net/manual/en/gmagick.separateimagechannel.php