(PECL imagick 2, PECL imagick 3)
Imagick::getImageDistortion — Compares an image to a reconstructed image
public Imagick::getImageDistortion ( MagickWand $reference , int $metric ) : float
Compares an image to a reconstructed image and returns the specified distortion metric.
reference
Imagick object to compare to.
metric
One of the metric type constants.
Returns the distortion metric used on the image (or the best guess thereof).
Throws ImagickException on error.
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https://www.php.net/manual/en/imagick.getimagedistortion.php