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Imagick::getImageChannelDistortions — Gets channel distortions
$channel= Imagick::CHANNEL_DEFAULT ] )
Compares one or more image channels of an image to a reconstructed image and returns the specified distortion metrics This method is available if Imagick has been compiled against ImageMagick version 6.4.4 or newer.
Imagick object containing the reference image
Refer to this list of metric type constants.
Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channel constants using bitwise operators. Defaults to
Imagick::CHANNEL_DEFAULT. Refer to this list of channel constants
Returns a double describing the channel distortion.
Throws ImagickException on error.