Imagick::separateImageChannel
Imagick::separateImageChannel
(PECL imagick 2.0.0)
Imagick::separateImageChannel — Separates a channel from the image
Description
bool Imagick::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
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channel
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Which 'channel' to return. For colorspaces other than RGB, you can still use the CHANNEL_RED,