第一段代码：只建立一个背景模型，摄像头不能动。首先累加前 T 帧图像，求均值，作为背景，然后当前帧减去求的背景，即为前景。 //Averaging background Method.

第二段代码：不断更新背景，摄像头可以动。-The first piece of code: create a background model, the camera can not move. First of all, cumulative T frame averaging, as a background, and then subtracting the current frame seeking the background is the prospect.// Averaging background Method.

The second paragraph of the code: continuously updated background, the camera can move.