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(PECL imagick 2.0.0)
Imagick::getImageDistortion — Compares an image to a reconstructed image
$reference
, int $metric
)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).
错误时抛出 ImagickException。