利用均值法背景建模，即把每一真的对应像素相加除以帧数，即的背景模型-aver background

将视频读取出来，并利用均值法的背景建模方法进行背景消除，并将原先的背景图像显示出来，并将提取出来的背景模型显示。-The video read out, and the use of background modeling method means method to eliminate the background and the background of the original image is displayed, and extracted the background model