Extended Tracking and Detection
This is a new feature where trackables can be extended by automatically creating new markers from the surrounding scene. This means that after being expanded, trackables can be detected and tracked from much further away, as the surrounding environment is gradually learned. Unlike switching to markerless tracking to extent the range of a trackable, this is drift-free and supports re-detection using the new markers. This can be turned on on a per-trackable basis (and should only be used for stationary markers, e.g. posters).
To use: - call the setExtensible(bool) function on an image trackable object to enable/disable extensions - call the clearExtensions() function to remove all existing extensions