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<title>Performs an ordered dither</title>
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<h1 class="refname">Imagick::orderedPosterizeImage</h1>
<p class="verinfo">(PECL imagick 2.2.2)</p><p class="refpurpose"><span class="refname">Imagick::orderedPosterizeImage</span> — <span class="dc-title">Performs an ordered dither</span></p>
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<div class="refsect1 description" id="refsect1-imagick.orderedposterizeimage-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>Imagick::orderedPosterizeImage</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$threshold_map</code></span>
[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$channel</code><span class="initializer"> = Imagick::CHANNEL_ALL</span></span>
] )</div>
<p class="para rdfs-comment">
Performs an ordered dither based on a number of pre-defined dithering threshold maps,
but over multiple intensity levels, which can be different for different channels,
according to the input arguments. This method is available if Imagick has been compiled against ImageMagick version 6.3.1 or newer.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-imagick.orderedposterizeimage-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">threshold_map</code></em></span>
<dd>
<p class="para">
A string containing the name of the threshold dither map to use
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">channel</code></em></span>
<dd>
<p class="para">
Provide any channel constant that is valid for your channel mode. To
apply to more than one channel, combine channeltype constants using
bitwise operators. Refer to this
list of <a href="imagick.constants.html#imagick.constants.channel" class="link">channel constants</a>.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-imagick.orderedposterizeimage-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.orderedposterizeimage-errors">
<h3 class="title">Errors/Exceptions</h3>
<p class="para">
Throws ImagickException on error.
</p>
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