Three-dimensional(3 D) point cloud data are widely used in intelligent driving, remote sensing, and virtual reality. This study presents a 3 D point cloud classification algorithm that classifies large outdoor scenes effectively and accurately. First, the algorithm eliminates outliers from the original point cloud. Then, based on the off-the-shelf ground-filtering algorithm, it leverages difference of norms to filter ground points. Then, it uses the density-based spatial clustering of applications with nois...