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The raw output of the Vicon system is a set of 3D point detections in every frame. On the individuals, the markers are arranged to form unique patterns on a 2D planar surface (think of a bunch of markers glued in a particular way onto a billboard).
The Vicon Nexus software detects these patterns within the point cloud on a per frame basis, while an additional tracker software assembles the per-frame detections into tracks, correcting some of the mistakes in per-frame detection. (TODO: is this indeed how it works, or are these independent software packagesdo the different Vicon modules something different? please explain, ideally also in the documentation on the Vicon data format). However, this process is not free of errors, and we thus would like to improve it.
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