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<div class="refentry" title="mosaicing">
<a name="libvips-mosaicing"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle"><a name="libvips-mosaicing.top_of_page"></a>mosaicing</span></h2>
<p>mosaicing — build image mosaics</p>
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<div class="refsect1" title="Stability Level">
<a name="libvips-mosaicing.stability-level"></a><h2>Stability Level</h2>
Stable, unless otherwise indicated
</div>
<div class="refsynopsisdiv" title="Synopsis">
<a name="libvips-mosaicing.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include &lt;vips/vips.h&gt;
<span class="returnvalue">int</span> <a class="link" href="libvips-mosaicing.html#im-lrmerge" title="im_lrmerge ()">im_lrmerge</a> (<em class="parameter"><code><span class="type">IMAGE</span> *ref</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *sec</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> dx</code></em>,
<em class="parameter"><code><span class="type">int</span> dy</code></em>,
<em class="parameter"><code><span class="type">int</span> mwidth</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-mosaicing.html#im-tbmerge" title="im_tbmerge ()">im_tbmerge</a> (<em class="parameter"><code><span class="type">IMAGE</span> *ref</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *sec</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> dx</code></em>,
<em class="parameter"><code><span class="type">int</span> dy</code></em>,
<em class="parameter"><code><span class="type">int</span> mwidth</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-mosaicing.html#im-lrmerge1" title="im_lrmerge1 ()">im_lrmerge1</a> (<em class="parameter"><code><span class="type">IMAGE</span> *ref</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *sec</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> xr1</code></em>,
<em class="parameter"><code><span class="type">int</span> yr1</code></em>,
<em class="parameter"><code><span class="type">int</span> xs1</code></em>,
<em class="parameter"><code><span class="type">int</span> ys1</code></em>,
<em class="parameter"><code><span class="type">int</span> xr2</code></em>,
<em class="parameter"><code><span class="type">int</span> yr2</code></em>,
<em class="parameter"><code><span class="type">int</span> xs2</code></em>,
<em class="parameter"><code><span class="type">int</span> ys2</code></em>,
<em class="parameter"><code><span class="type">int</span> mwidth</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-mosaicing.html#im-tbmerge1" title="im_tbmerge1 ()">im_tbmerge1</a> (<em class="parameter"><code><span class="type">IMAGE</span> *ref</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *sec</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> xr1</code></em>,
<em class="parameter"><code><span class="type">int</span> yr1</code></em>,
<em class="parameter"><code><span class="type">int</span> xs1</code></em>,
<em class="parameter"><code><span class="type">int</span> ys1</code></em>,
<em class="parameter"><code><span class="type">int</span> xr2</code></em>,
<em class="parameter"><code><span class="type">int</span> yr2</code></em>,
<em class="parameter"><code><span class="type">int</span> xs2</code></em>,
<em class="parameter"><code><span class="type">int</span> ys2</code></em>,
<em class="parameter"><code><span class="type">int</span> mwidth</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-mosaicing.html#im-lrmosaic" title="im_lrmosaic ()">im_lrmosaic</a> (<em class="parameter"><code><span class="type">IMAGE</span> *ref</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *sec</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> bandno</code></em>,
<em class="parameter"><code><span class="type">int</span> xref</code></em>,
<em class="parameter"><code><span class="type">int</span> yref</code></em>,
<em class="parameter"><code><span class="type">int</span> xsec</code></em>,
<em class="parameter"><code><span class="type">int</span> ysec</code></em>,
<em class="parameter"><code><span class="type">int</span> halfcorrelation</code></em>,
<em class="parameter"><code><span class="type">int</span> halfarea</code></em>,
<em class="parameter"><code><span class="type">int</span> balancetype</code></em>,
<em class="parameter"><code><span class="type">int</span> mwidth</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-mosaicing.html#im-tbmosaic" title="im_tbmosaic ()">im_tbmosaic</a> (<em class="parameter"><code><span class="type">IMAGE</span> *ref</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *sec</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> bandno</code></em>,
<em class="parameter"><code><span class="type">int</span> xref</code></em>,
<em class="parameter"><code><span class="type">int</span> yref</code></em>,
<em class="parameter"><code><span class="type">int</span> xsec</code></em>,
<em class="parameter"><code><span class="type">int</span> ysec</code></em>,
<em class="parameter"><code><span class="type">int</span> halfcorrelation</code></em>,
<em class="parameter"><code><span class="type">int</span> halfarea</code></em>,
<em class="parameter"><code><span class="type">int</span> balancetype</code></em>,
<em class="parameter"><code><span class="type">int</span> mwidth</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-mosaicing.html#im-lrmosaic1" title="im_lrmosaic1 ()">im_lrmosaic1</a> (<em class="parameter"><code><span class="type">IMAGE</span> *ref</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *sec</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> bandno</code></em>,
<em class="parameter"><code><span class="type">int</span> xr1</code></em>,
<em class="parameter"><code><span class="type">int</span> yr1</code></em>,
<em class="parameter"><code><span class="type">int</span> xs1</code></em>,
<em class="parameter"><code><span class="type">int</span> ys1</code></em>,
<em class="parameter"><code><span class="type">int</span> xr2</code></em>,
<em class="parameter"><code><span class="type">int</span> yr2</code></em>,
<em class="parameter"><code><span class="type">int</span> xs2</code></em>,
<em class="parameter"><code><span class="type">int</span> ys2</code></em>,
<em class="parameter"><code><span class="type">int</span> halfcorrelation</code></em>,
<em class="parameter"><code><span class="type">int</span> halfarea</code></em>,
<em class="parameter"><code><span class="type">int</span> balancetype</code></em>,
<em class="parameter"><code><span class="type">int</span> mwidth</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-mosaicing.html#im-tbmosaic1" title="im_tbmosaic1 ()">im_tbmosaic1</a> (<em class="parameter"><code><span class="type">IMAGE</span> *ref</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *sec</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> bandno</code></em>,
<em class="parameter"><code><span class="type">int</span> xr1</code></em>,
<em class="parameter"><code><span class="type">int</span> yr1</code></em>,
<em class="parameter"><code><span class="type">int</span> xs1</code></em>,
<em class="parameter"><code><span class="type">int</span> ys1</code></em>,
<em class="parameter"><code><span class="type">int</span> xr2</code></em>,
<em class="parameter"><code><span class="type">int</span> yr2</code></em>,
<em class="parameter"><code><span class="type">int</span> xs2</code></em>,
<em class="parameter"><code><span class="type">int</span> ys2</code></em>,
<em class="parameter"><code><span class="type">int</span> halfcorrelation</code></em>,
<em class="parameter"><code><span class="type">int</span> halfarea</code></em>,
<em class="parameter"><code><span class="type">int</span> balancetype</code></em>,
<em class="parameter"><code><span class="type">int</span> mwidth</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-mosaicing.html#im-global-balance" title="im_global_balance ()">im_global_balance</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">double</span> gamma</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-mosaicing.html#im-global-balancef" title="im_global_balancef ()">im_global_balancef</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">double</span> gamma</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-mosaicing.html#im-correl" title="im_correl ()">im_correl</a> (<em class="parameter"><code><span class="type">IMAGE</span> *ref</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *sec</code></em>,
<em class="parameter"><code><span class="type">int</span> xref</code></em>,
<em class="parameter"><code><span class="type">int</span> yref</code></em>,
<em class="parameter"><code><span class="type">int</span> xsec</code></em>,
<em class="parameter"><code><span class="type">int</span> ysec</code></em>,
<em class="parameter"><code><span class="type">int</span> hwindowsize</code></em>,
<em class="parameter"><code><span class="type">int</span> hsearchsize</code></em>,
<em class="parameter"><code><span class="type">double</span> *correlation</code></em>,
<em class="parameter"><code><span class="type">int</span> *x</code></em>,
<em class="parameter"><code><span class="type">int</span> *y</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-mosaicing.html#im-remosaic" title="im_remosaic ()">im_remosaic</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>const <span class="type">char</span> *old_str</code></em>,
<em class="parameter"><code>const <span class="type">char</span> *new_str</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-mosaicing.html#im-align-bands" title="im_align_bands ()">im_align_bands</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>);
<span class="returnvalue">int</span> <a class="link" href="libvips-mosaicing.html#im-maxpos-subpel" title="im_maxpos_subpel ()">im_maxpos_subpel</a> (<em class="parameter"><code><span class="type">IMAGE</span> *in</code></em>,
<em class="parameter"><code><span class="type">double</span> *x</code></em>,
<em class="parameter"><code><span class="type">double</span> *y</code></em>);
</pre>
</div>
<div class="refsect1" title="Description">
<a name="libvips-mosaicing.description"></a><h2>Description</h2>
<p>
A set of operations for assembling large image mosaics.
</p>
</div>
<div class="refsect1" title="Details">
<a name="libvips-mosaicing.details"></a><h2>Details</h2>
<div class="refsect2" title="im_lrmerge ()">
<a name="im-lrmerge"></a><h3>im_lrmerge ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_lrmerge (<em class="parameter"><code><span class="type">IMAGE</span> *ref</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *sec</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> dx</code></em>,
<em class="parameter"><code><span class="type">int</span> dy</code></em>,
<em class="parameter"><code><span class="type">int</span> mwidth</code></em>);</pre>
</div>
<hr>
<div class="refsect2" title="im_tbmerge ()">
<a name="im-tbmerge"></a><h3>im_tbmerge ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_tbmerge (<em class="parameter"><code><span class="type">IMAGE</span> *ref</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *sec</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> dx</code></em>,
<em class="parameter"><code><span class="type">int</span> dy</code></em>,
<em class="parameter"><code><span class="type">int</span> mwidth</code></em>);</pre>
</div>
<hr>
<div class="refsect2" title="im_lrmerge1 ()">
<a name="im-lrmerge1"></a><h3>im_lrmerge1 ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_lrmerge1 (<em class="parameter"><code><span class="type">IMAGE</span> *ref</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *sec</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> xr1</code></em>,
<em class="parameter"><code><span class="type">int</span> yr1</code></em>,
<em class="parameter"><code><span class="type">int</span> xs1</code></em>,
<em class="parameter"><code><span class="type">int</span> ys1</code></em>,
<em class="parameter"><code><span class="type">int</span> xr2</code></em>,
<em class="parameter"><code><span class="type">int</span> yr2</code></em>,
<em class="parameter"><code><span class="type">int</span> xs2</code></em>,
<em class="parameter"><code><span class="type">int</span> ys2</code></em>,
<em class="parameter"><code><span class="type">int</span> mwidth</code></em>);</pre>
</div>
<hr>
<div class="refsect2" title="im_tbmerge1 ()">
<a name="im-tbmerge1"></a><h3>im_tbmerge1 ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_tbmerge1 (<em class="parameter"><code><span class="type">IMAGE</span> *ref</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *sec</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> xr1</code></em>,
<em class="parameter"><code><span class="type">int</span> yr1</code></em>,
<em class="parameter"><code><span class="type">int</span> xs1</code></em>,
<em class="parameter"><code><span class="type">int</span> ys1</code></em>,
<em class="parameter"><code><span class="type">int</span> xr2</code></em>,
<em class="parameter"><code><span class="type">int</span> yr2</code></em>,
<em class="parameter"><code><span class="type">int</span> xs2</code></em>,
<em class="parameter"><code><span class="type">int</span> ys2</code></em>,
<em class="parameter"><code><span class="type">int</span> mwidth</code></em>);</pre>
</div>
<hr>
<div class="refsect2" title="im_lrmosaic ()">
<a name="im-lrmosaic"></a><h3>im_lrmosaic ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_lrmosaic (<em class="parameter"><code><span class="type">IMAGE</span> *ref</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *sec</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> bandno</code></em>,
<em class="parameter"><code><span class="type">int</span> xref</code></em>,
<em class="parameter"><code><span class="type">int</span> yref</code></em>,
<em class="parameter"><code><span class="type">int</span> xsec</code></em>,
<em class="parameter"><code><span class="type">int</span> ysec</code></em>,
<em class="parameter"><code><span class="type">int</span> halfcorrelation</code></em>,
<em class="parameter"><code><span class="type">int</span> halfarea</code></em>,
<em class="parameter"><code><span class="type">int</span> balancetype</code></em>,
<em class="parameter"><code><span class="type">int</span> mwidth</code></em>);</pre>
</div>
<hr>
<div class="refsect2" title="im_tbmosaic ()">
<a name="im-tbmosaic"></a><h3>im_tbmosaic ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_tbmosaic (<em class="parameter"><code><span class="type">IMAGE</span> *ref</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *sec</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> bandno</code></em>,
<em class="parameter"><code><span class="type">int</span> xref</code></em>,
<em class="parameter"><code><span class="type">int</span> yref</code></em>,
<em class="parameter"><code><span class="type">int</span> xsec</code></em>,
<em class="parameter"><code><span class="type">int</span> ysec</code></em>,
<em class="parameter"><code><span class="type">int</span> halfcorrelation</code></em>,
<em class="parameter"><code><span class="type">int</span> halfarea</code></em>,
<em class="parameter"><code><span class="type">int</span> balancetype</code></em>,
<em class="parameter"><code><span class="type">int</span> mwidth</code></em>);</pre>
</div>
<hr>
<div class="refsect2" title="im_lrmosaic1 ()">
<a name="im-lrmosaic1"></a><h3>im_lrmosaic1 ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_lrmosaic1 (<em class="parameter"><code><span class="type">IMAGE</span> *ref</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *sec</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> bandno</code></em>,
<em class="parameter"><code><span class="type">int</span> xr1</code></em>,
<em class="parameter"><code><span class="type">int</span> yr1</code></em>,
<em class="parameter"><code><span class="type">int</span> xs1</code></em>,
<em class="parameter"><code><span class="type">int</span> ys1</code></em>,
<em class="parameter"><code><span class="type">int</span> xr2</code></em>,
<em class="parameter"><code><span class="type">int</span> yr2</code></em>,
<em class="parameter"><code><span class="type">int</span> xs2</code></em>,
<em class="parameter"><code><span class="type">int</span> ys2</code></em>,
<em class="parameter"><code><span class="type">int</span> halfcorrelation</code></em>,
<em class="parameter"><code><span class="type">int</span> halfarea</code></em>,
<em class="parameter"><code><span class="type">int</span> balancetype</code></em>,
<em class="parameter"><code><span class="type">int</span> mwidth</code></em>);</pre>
</div>
<hr>
<div class="refsect2" title="im_tbmosaic1 ()">
<a name="im-tbmosaic1"></a><h3>im_tbmosaic1 ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_tbmosaic1 (<em class="parameter"><code><span class="type">IMAGE</span> *ref</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *sec</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> bandno</code></em>,
<em class="parameter"><code><span class="type">int</span> xr1</code></em>,
<em class="parameter"><code><span class="type">int</span> yr1</code></em>,
<em class="parameter"><code><span class="type">int</span> xs1</code></em>,
<em class="parameter"><code><span class="type">int</span> ys1</code></em>,
<em class="parameter"><code><span class="type">int</span> xr2</code></em>,
<em class="parameter"><code><span class="type">int</span> yr2</code></em>,
<em class="parameter"><code><span class="type">int</span> xs2</code></em>,
<em class="parameter"><code><span class="type">int</span> ys2</code></em>,
<em class="parameter"><code><span class="type">int</span> halfcorrelation</code></em>,
<em class="parameter"><code><span class="type">int</span> halfarea</code></em>,
<em class="parameter"><code><span class="type">int</span> balancetype</code></em>,
<em class="parameter"><code><span class="type">int</span> mwidth</code></em>);</pre>
</div>
<hr>
<div class="refsect2" title="im_global_balance ()">
<a name="im-global-balance"></a><h3>im_global_balance ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_global_balance (<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">double</span> gamma</code></em>);</pre>
</div>
<hr>
<div class="refsect2" title="im_global_balancef ()">
<a name="im-global-balancef"></a><h3>im_global_balancef ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_global_balancef (<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">double</span> gamma</code></em>);</pre>
</div>
<hr>
<div class="refsect2" title="im_correl ()">
<a name="im-correl"></a><h3>im_correl ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_correl (<em class="parameter"><code><span class="type">IMAGE</span> *ref</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *sec</code></em>,
<em class="parameter"><code><span class="type">int</span> xref</code></em>,
<em class="parameter"><code><span class="type">int</span> yref</code></em>,
<em class="parameter"><code><span class="type">int</span> xsec</code></em>,
<em class="parameter"><code><span class="type">int</span> ysec</code></em>,
<em class="parameter"><code><span class="type">int</span> hwindowsize</code></em>,
<em class="parameter"><code><span class="type">int</span> hsearchsize</code></em>,
<em class="parameter"><code><span class="type">double</span> *correlation</code></em>,
<em class="parameter"><code><span class="type">int</span> *x</code></em>,
<em class="parameter"><code><span class="type">int</span> *y</code></em>);</pre>
</div>
<hr>
<div class="refsect2" title="im_remosaic ()">
<a name="im-remosaic"></a><h3>im_remosaic ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_remosaic (<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>const <span class="type">char</span> *old_str</code></em>,
<em class="parameter"><code>const <span class="type">char</span> *new_str</code></em>);</pre>
</div>
<hr>
<div class="refsect2" title="im_align_bands ()">
<a name="im-align-bands"></a><h3>im_align_bands ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_align_bands (<em class="parameter"><code><span class="type">IMAGE</span> *in</code></em>,
<em class="parameter"><code><span class="type">IMAGE</span> *out</code></em>);</pre>
</div>
<hr>
<div class="refsect2" title="im_maxpos_subpel ()">
<a name="im-maxpos-subpel"></a><h3>im_maxpos_subpel ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_maxpos_subpel (<em class="parameter"><code><span class="type">IMAGE</span> *in</code></em>,
<em class="parameter"><code><span class="type">double</span> *x</code></em>,
<em class="parameter"><code><span class="type">double</span> *y</code></em>);</pre>
</div>
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