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<title>Compares an image to a reconstructed image</title>
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<h1 class="refname">Imagick::getImageDistortion</h1>
<p class="verinfo">(PECL imagick 2.0.0)</p><p class="refpurpose"><span class="refname">Imagick::getImageDistortion</span> — <span class="dc-title">Compares an image to a reconstructed image</span></p>
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<div class="refsect1 description" id="refsect1-imagick.getimagedistortion-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">float</span> <span class="methodname"><strong>Imagick::getImageDistortion</strong></span>
( <span class="methodparam"><span class="type"><span class="type MagickWand">MagickWand</span></span> <code class="parameter">$reference</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$metric</code></span>
)</div>
<p class="para rdfs-comment">
Compares an image to a reconstructed image and returns the specified distortion
metric.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-imagick.getimagedistortion-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">reference</code></em></span>
<dd>
<p class="para">
Imagick object to compare to.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">metric</code></em></span>
<dd>
<p class="para">
One of the <a href="imagick.constants.html#imagick.constants.metric" class="link">metric type constants</a>.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-imagick.getimagedistortion-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns the distortion metric used on the image (or the best guess
thereof).
</p>
</div>
<div class="refsect1 errors" id="refsect1-imagick.getimagedistortion-errors">
<h3 class="title">Errors/Exceptions</h3>
<p class="para">
Throws ImagickException on error.
</p>
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