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.