that are
visible in both cases). A good feature extractor will also be robust to noise
and other distortion. The repeatability is the percentage of detected features
that survive a viewpoint change or some other transformation or disturbance in
going from IMAGEA to IMAGEB and is calculated only based on the frames
overlap. For detail about this test see <a href="#rep.ref1">[1]</a>. </p>

<p> For measuring feature extractors repeatability there is a class
<code>benchmarks.RepeatabilityBenchmarks()</code>. To