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<h2><span class="refentrytitle"><a name="libvips-cimg-funcs.top_of_page"></a>cimg_funcs</span></h2>
<p>cimg_funcs — expose operations from the CImg library, mostly noise
removal</p>
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<div class="refsect1" title="Stability Level">
<a name="libvips-cimg-funcs.stability-level"></a><h2>Stability Level</h2>
Stable, unless otherwise indicated
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<div class="refsynopsisdiv" title="Synopsis">
<a name="libvips-cimg-funcs.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include &lt;vips/vips.h&gt;
<span class="returnvalue">int</span> <a class="link" href="libvips-cimg-funcs.html#im-greyc-mask" title="im_greyc_mask ()">im_greyc_mask</a> (<em class="parameter"><code><span class="type">IMAGE</span> *in</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *out</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *mask</code></em>,
<em class="parameter"><code><span class="type">int</span> iterations</code></em>,
<em class="parameter"><code><span class="type">float</span> amplitude</code></em>,
<em class="parameter"><code><span class="type">float</span> sharpness</code></em>,
<em class="parameter"><code><span class="type">float</span> anisotropy</code></em>,
<em class="parameter"><code><span class="type">float</span> alpha</code></em>,
<em class="parameter"><code><span class="type">float</span> sigma</code></em>,
<em class="parameter"><code><span class="type">float</span> dl</code></em>,
<em class="parameter"><code><span class="type">float</span> da</code></em>,
<em class="parameter"><code><span class="type">float</span> gauss_prec</code></em>,
<em class="parameter"><code><span class="type">int</span> interpolation</code></em>,
<em class="parameter"><code><span class="type">int</span> fast_approx</code></em>);
</pre>
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<div class="refsect1" title="Description">
<a name="libvips-cimg-funcs.description"></a><h2>Description</h2>
<p>
The GREYCstoration filter.
</p>
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<div class="refsect1" title="Details">
<a name="libvips-cimg-funcs.details"></a><h2>Details</h2>
<div class="refsect2" title="im_greyc_mask ()">
<a name="im-greyc-mask"></a><h3>im_greyc_mask ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_greyc_mask (<em class="parameter"><code><span class="type">IMAGE</span> *in</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *out</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *mask</code></em>,
<em class="parameter"><code><span class="type">int</span> iterations</code></em>,
<em class="parameter"><code><span class="type">float</span> amplitude</code></em>,
<em class="parameter"><code><span class="type">float</span> sharpness</code></em>,
<em class="parameter"><code><span class="type">float</span> anisotropy</code></em>,
<em class="parameter"><code><span class="type">float</span> alpha</code></em>,
<em class="parameter"><code><span class="type">float</span> sigma</code></em>,
<em class="parameter"><code><span class="type">float</span> dl</code></em>,
<em class="parameter"><code><span class="type">float</span> da</code></em>,
<em class="parameter"><code><span class="type">float</span> gauss_prec</code></em>,
<em class="parameter"><code><span class="type">int</span> interpolation</code></em>,
<em class="parameter"><code><span class="type">int</span> fast_approx</code></em>);</pre>
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