To generate 6DOF data for an arrangement of markers in Tracker, you must create objects. For best results, each object must be rigid and consist of at least four asymmetric markers. You create and manage objects in the Tracking panel, which is part of the default layout and is displayed as a tab in the left pane.
You can define multiple objects to track many rigid bodies at the same time and you can apply different smoothing filtration presets to each one.
For more information, see: