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Imagick::compareImages

Compares an image to a reconstructed image ()
array Imagick::compareImages ( Imagick compare, int metric )

Warning:

This function is currently not documented; only the argument list is available.

Warning:

This function is EXPERIMENTAL. The behaviour of this function, the name of this function, and anything else documented about this function may change without notice in a future release of PHP. Use this function at your own risk.

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

Parameters

compare

An image to compare to.

metric

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

Return Values

Returns TRUE on success.

Examples

Example 1039. Using Imagick::compareImages():

Compare images and display the reconstructed image

<?php

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

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

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

?>