Wepresentanautomatic,real-timehumantrackingandobservationsystem.Robustnessandspeedarethetwomajorbottlenecksoftheexistingapproaches.Weimproveupontherobustnessandspeedofthecurrentstate-of-artbyintegratingamean-shiftbasedmodelupdatetechniquewithanadaptivechangedetectionmethod.Wealsoprovi