基于opencv的运动人流分类，采用了帧差法、DBSCAN聚类算法实现-Based on opencv motion flow classification, using the frame difference, DBSCAN clustering algorithm

DBSCAN是一个基于密度的聚类算法,改算法将具有足够高度的区域划分为簇(DBSCAN is a density based clustering algorithm, the algorithm will have enough height area is divided into clusters)