Gmagick::separateimagechannel
PHP function
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(PECL gmagick >= Unknown)
Separates a channel from the image
Description
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
channelOne of the Channel constant (
Gmagick::CHANNEL_*).
Return Values
The Gmagick object.
Errors/Exceptions
Throw