s="block">Adds descriptors to train a CPU(trainDescCollectionis) or GPU(utrainDescCollectionis) descriptor
     collection.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/features2d/DescriptorMatcher.html#clear--">clear</a></span>()</code>
<div class="block">Clears the train descriptor collections.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code><a href=