中文说明：简单的运动目标检测算法，适合初学者。使用的原理是帧间查分算法，比较简单。可以改进成三帧查分算法或者可以结合其他算法。这个代码可以给初学者一个很好的参考。
English Description：
Moving object detection algorithm for simple, suitable for beginners. Is the rationale for using inter-frame search algorithm is relatively simple. Could be improved into a three-frame search algorithm, or can be combined with other algorithms. This code can be a good reference for beginners.