tracking opencv 3

edit

I have the background-subtracted Video of a scene with several moving objects: The moving objects are white pixels (1) ; the background is black (0). In OpenCV 2.4, there was this "Legacy" folder containing the blobtrack.hpp file, that was able to track these moving objects and give them an ID. Is there a possibility to do this in OpenCV 3 (C++), too? I need "ID-feature", that can determine which object in the first frame is the object in the second frame.

Thank you very much!