Today the weakness of most video analytic products in the market is their detection accuracy. No matter who claims their product has 99% detection rate, it is almost not true in complex environments, rather false alarms are raised as more objects appear in the scene. To address this EyeSoft invents innovative ways to identify humans in complex environments. With our human tracking engine, many demanding reasons like loitering detection or people counting in arbitrary camera angle become possible in complex environments, such as in shopping mall or exhibition Halls.