(PECL imagick 2, PECL imagick 3)
Imagick::compareImageLayers — Returns the maximum bounding region between images
Compares each image with the next in a sequence and returns the maximum bounding region of any pixel differences it discovers. Questo metodo è disponibile se Imagick è stato compilato con ImageMagick versione 6.2.9 o successive.
Restituisce true in caso di successo.
Lancia una ImagickException in caso di errore.
Example #1 Using Imagick::compareImageLayers()
Comparing image layers
<?php
/* create new imagick object */
$im = new Imagick("test.gif");
/* optimize the image layers */
$result = $im->compareImageLayers(imagick::LAYERMETHOD_COALESCE);
/* work on the $result */
?>