java.lang.String&nbsp;descriptorMatcherType)</code>
<div class="block">Creates a descriptor matcher of a given type with the default parameters (using default
     constructor).</div>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/features2d/DescriptorMatcher.html#empty--">empty</a></span>()</code>
<div class="block">Returns true if there are no train descriptors in the both collecti