常见的目标检测方法主要有光流法，帧差法和背景模型法。光流法利用背景和运动目标的运动速度不同进行目标检测，计算量较大；帧差法对连续几帧图像的背景进行配准，通过前后帧的差分图像分离出运动物体；背景差法根据已知背景对图像进行差分，在运动背景下需要对背景模型进行更新。-Common target detection methods are mainly optical flow method, frame differential method and background model method. Optical flow method with different background and moving target movement speed target detection, large amount of calculation　In successive frames image frame differential method for registration, the background of moving object was isolated through front and rear frame difference image　Background difference method based on the background of image difference known, under the background of sports need to update the background model.