Adding a new Detector/Descriptor to Evaluation-Sample [closed]

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Hi,

yesterday i evaluated a few feature detectors and descriptors. I used the detector_descriptor_evaluation.cpp, which is located in the samples folder of the main repo.

After a few modifications the tests worked as expected. Unfortunately the list of the detectors and descriptors is out-of-date (e.g. ORB or FREAK are not included). I added ORB myself and it seems to work...but there is one little problem. All other detectors and descriptors have an xml file with quality results, e.g. SURF_res.xml (located in opencv_extra/testdata/cv/detectors_descriptors_evaluation/detectors)

So my question is: For what exactly is this file good for and how can i generate one for the detectors which are not included?