Imagick::getImageDistortion()
(PECL imagick 2.0.0)
Compares an image to a reconstructed image
说明
Imagick::getImageDistortion(MagickWand$reference,int $metric):float
Compares an image to a reconstructed image and returns the specified distortion metric.
参数
- $reference
Imagick object to compare to.
- $metric
One of the metric type constants.
返回值
Returns the distortion metric used on the image(or the best guess thereof).
错误／异常
错误时抛出 ImagickException。