运动物体检测，包括背景处理（中值滤波，灰度化，确定匹配中心，得到特征区域，物体轨迹的绘制），运动判定分析（腐蚀膨胀等）-Moving object detection, including background processing (median filter, grayscale, match the center to determine, by feature area, the object trajectory drawing), exercise decision analysis