rs.</div>
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<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>descriptors</code> - Descriptors to add. Each descriptors[i] is a set of descriptors from the same
     train image.</dd>
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<h4>clear</h4>
<pre>public&nbsp;void&nbsp;clear()</pre>
<div class="block">Clears the train descriptor collections.</div>
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<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../..