Php/docs/imagick.getimagechanneldistortions
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Imagick::getImageChannelDistortions
(PECL imagick 2 >= 2.3.0, PECL imagick 3)
Imagick::getImageChannelDistortions — Gets channel distortions
Description
public Imagick::getImageChannelDistortions
( Imagick $reference
, int $metric
[, int $channel
= Imagick::CHANNEL_DEFAULT
] ) : float
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.
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.