# Imagick::compareImages

(No version information available, might be only in CVS)

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

### Description

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#1 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];
?>`