Gmagick::scaleimage

Gmagick::setCompressionQuality

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: 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.