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<h1 class="refname">Imagick::contrastImage</h1>
<p class="verinfo">(PECL imagick 2.0.0)</p><p class="refpurpose"><span class="refname">Imagick::contrastImage</span> — <span class="dc-title">Change the contrast of the image</span></p>
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<div class="refsect1 description" id="refsect1-imagick.contrastimage-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>Imagick::contrastImage</strong></span>
( <span class="methodparam"><span class="type">bool</span> <code class="parameter">$sharpen</code></span>
)</div>
<p class="para rdfs-comment">
Enhances the intensity differences between the lighter and
darker elements of the image. Set sharpen to a value other
than 0 to increase the image contrast otherwise the contrast
is reduced.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-imagick.contrastimage-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<code class="parameter">sharpen</code></dt>
<dd>
<p class="para">
The sharpen value
</p>
</dd>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-imagick.contrastimage-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> on success.
</p>
</div>
<div class="refsect1 errors" id="refsect1-imagick.contrastimage-errors">
<h3 class="title">Errors/Exceptions</h3>
<p class="para">
Throws ImagickException on error.
</p>
</div>
<div class="refsect1 examples" id="refsect1-imagick.contrastimage-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-3900">
<p><strong>Example #1 <span class="function"><strong>Imagick::contrastImage()</strong></span></strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /></span><span style="color: #007700">function </span><span style="color: #0000BB">contrastImage</span><span style="color: #007700">(</span><span style="color: #0000BB">$imagePath</span><span style="color: #007700">, </span><span style="color: #0000BB">$contrastType</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">$imagick </span><span style="color: #007700">= new \</span><span style="color: #0000BB">Imagick</span><span style="color: #007700">(</span><span style="color: #0000BB">realpath</span><span style="color: #007700">(</span><span style="color: #0000BB">$imagePath</span><span style="color: #007700">));<br /> if (</span><span style="color: #0000BB">$contrastType </span><span style="color: #007700">!= </span><span style="color: #0000BB">2</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">$imagick</span><span style="color: #007700">-></span><span style="color: #0000BB">contrastImage</span><span style="color: #007700">(</span><span style="color: #0000BB">$contrastType</span><span style="color: #007700">);<br /> }<br /><br /> </span><span style="color: #0000BB">header</span><span style="color: #007700">(</span><span style="color: #DD0000">"Content-Type: image/jpg"</span><span style="color: #007700">);<br /> echo </span><span style="color: #0000BB">$imagick</span><span style="color: #007700">-></span><span style="color: #0000BB">getImageBlob</span><span style="color: #007700">();<br />}<br /><br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
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