Imagick::getImageChannelDistortions
(PECL imagick 2 >= 2.3.0, PECL imagick 3)
Imagick::getImageChannelDistortions — Gets channel distortions
Description
$reference, int $metric, int $channel = Imagick::CHANNEL_DEFAULT): floatCompares 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.
Parameters
-
reference -
Imagick object containing the reference image
-
metric -
Refer to this list of metric type constants.
-
channel -
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
Return Values
Returns a double describing the channel distortion.
Errors/Exceptions
Throws ImagickException on error.
