(No version information available, might be only in CVS)
Imagick::separateImageChannel — Separates a channel from the image
This function is currently not documented; only the argument list is available.
This function is EXPERIMENTAL. The behaviour of this function, the name of this function, and anything else documented about this function may change without notice in a future release of PHP. Use this function at your own risk.
Separates a channel from the image and returns a grayscale image. A channel is a particular color component of each pixel in the image.
Returns TRUE on success.