对两个及两个以上目标提取边缘和特征，并通过边缘画出目标的外接矩形，外界矩形广泛用于目标的识别和跟踪。-two pairs and two more goals and edge extraction features, and painted goal edge through the external rectangular, Rectangular widely used outside the target identificat

对两个及两个以上目标提取边缘和特征，并通过边缘画出目标的外接矩形，外界矩形广泛用于目标的识别和跟踪。-two pairs and two more goals and edge extraction features, and painted goal edge through the external rectangular, Rectangular widely used outside the target identificat

利用外接矩形描述人体目标，在Matlab里实现跌倒检测。-Using external rectangle describes human target, realize the fall detection in Matlab.