Separates a channel from the image

# Gmagick::separateimagechannel

(PECL gmagick >= Unknown)

Gmagick::separateimagechannel — Separates a channel from the image

### Descrierea

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.

### Parametri

`channel`

  Identify which channel to extract: RedChannel, GreenChannel, BlueChannel, OpacityChannel, CyanChannel, MagentaChannel, YellowChannel, BlackChannel.

### Valorile întoarse

The Gmagick object on success

### Erori/Excepții

Emite o GmagickException în caz de eroare.