ible matches between the input query
     descriptors and stored train descriptors from the i-th image trainDescCollection[i].</dd>
<dd><code>compactResult</code> - Parameter used when the mask (or masks) is not empty. If compactResult is
     false, the matches vector has the same size as queryDescriptors rows. If compactResult is true,
     the matches vector does not contain matches for fully masked-out query descriptors.</dd>
</dl>
</li>
</ul>
<a name="radiusMatch-org.opencv.core.Mat-org.opencv.core.Mat