A context-aware system is one that gracefully adapts to user environment changes, rendering its applications/services more personalized. Location has been long considered as the most important context and numerous Location Based Services have b

背景差和帧差法实现运动人体的跟踪，具有搞噪声和消除大部分阴影功能-Background subtraction and frame difference method to achieve the tracking of the movement of the human body to engage in noise and eliminate most of the shadow function