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<title>Creates a high-contrast, two-color image</title>
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<h1 class="refname">Imagick::randomThresholdImage</h1>
<p class="verinfo">(PECL imagick 2.0.0)</p><p class="refpurpose"><span class="refname">Imagick::randomThresholdImage</span> — <span class="dc-title">Creates a high-contrast, two-color image</span></p>
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<div class="refsect1 description" id="refsect1-imagick.randomthresholdimage-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>Imagick::randomThresholdImage</strong></span>
( <span class="methodparam"><span class="type">float</span> <code class="parameter">$low</code></span>
, <span class="methodparam"><span class="type">float</span> <code class="parameter">$high</code></span>
[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$channel</code><span class="initializer"> = Imagick::CHANNEL_DEFAULT</span></span>
] )</div>
<p class="para rdfs-comment">
Changes the value of individual pixels based on the
intensity of each pixel compared to threshold. The
result is a high-contrast, two color image. This method is available if Imagick has been compiled against ImageMagick version 6.2.9 or newer.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-imagick.randomthresholdimage-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<code class="parameter">low</code></dt>
<dd>
<p class="para">
The low point
</p>
</dd>
<dt>
<code class="parameter">high</code></dt>
<dd>
<p class="para">
The high point
</p>
</dd>
<dt>
<code class="parameter">channel</code></dt>
<dd>
<p class="para">
Provide any channel constant that is valid for your channel mode. To
apply to more than one channel, combine channeltype constants using
bitwise operators. Refer to this
list of <a href="imagick.constants.html#imagick.constants.channel" class="link">channel constants</a>.
</p>
</dd>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-imagick.randomthresholdimage-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> on success.
</p>
</div>
<div class="refsect1 examples" id="refsect1-imagick.randomthresholdimage-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-3988">
<p><strong>Example #1 <span class="function"><strong>Imagick::randomThresholdImage()</strong></span></strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /></span><span style="color: #007700">function </span><span style="color: #0000BB">randomThresholdimage</span><span style="color: #007700">(</span><span style="color: #0000BB">$imagePath</span><span style="color: #007700">, </span><span style="color: #0000BB">$lowThreshold</span><span style="color: #007700">, </span><span style="color: #0000BB">$highThreshold</span><span style="color: #007700">, </span><span style="color: #0000BB">$channel</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">$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">$imagePath</span><span style="color: #007700">));<br /><br /> </span><span style="color: #0000BB">$imagick</span><span style="color: #007700">-></span><span style="color: #0000BB">randomThresholdimage</span><span style="color: #007700">(<br /> </span><span style="color: #0000BB">$lowThreshold </span><span style="color: #007700">* \</span><span style="color: #0000BB">Imagick</span><span style="color: #007700">::</span><span style="color: #0000BB">getQuantum</span><span style="color: #007700">(),<br /> </span><span style="color: #0000BB">$highThreshold </span><span style="color: #007700">* \</span><span style="color: #0000BB">Imagick</span><span style="color: #007700">::</span><span style="color: #0000BB">getQuantum</span><span style="color: #007700">(),<br /> </span><span style="color: #0000BB">$channel<br /> </span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">header</span><span style="color: #007700">(</span><span style="color: #DD0000">"Content-Type: image/jpg"</span><span style="color: #007700">);<br /> echo </span><span style="color: #0000BB">$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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