Gmagick::scaleimage

Gmagick::setCompressionQuality

Gmagick::separateimagechannel

Separates a channel from the image

Beschreibung

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.

Parameter-Liste

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

Rückgabewerte

The Gmagick object on success

Fehler/Exceptions

Wirft bei einem Fehler eine GmagickException.