Imagick::compareImages

(PECL imagick 2.0.0)

Imagick::compareImages — Compares an image to a reconstructed image

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Imagick::compareImages ( Imagick $compare , int $metric ) : array

Returns an array containing a reconstructed image and the difference between images.

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compare

An image to compare to.

metric

Provide a valid metric type constant. Refer to this list of metric constants.

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Returns an array containing a reconstructed image and the difference between images.

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Example #1 Using Imagick::compareImages():

Compare images and display the reconstructed image

<?php

$image1 = new imagick("image1.png");
$image2 = new imagick("image2.png");

$result = $image1->compareImages($image2, Imagick::METRIC_MEANSQUAREERROR);
$result[0]->setImageFormat("png");

header("Content-Type: image/png");
echo $result[0];

?>