Abstract: Point cloud of 3D segmentation is an important task to extract the point cloud data space based on geometric information.It is the basis of point cloud data feature extraction and analysis.At the same time,the point cloud data are usually discrete and unstructured.The segmentation of point cloud data is not a simple data processing task,and the segmentation efficiency and accuracy determine the data processing results of the work.Therefore,the research of point cloud data segmentation has important significance.This paper presented a cutting algorithm for 3D point cloud based on adaptive angle,in which the PCA algorithm is used to find the optimal dimension projection direction to reduce the dimension of the original point cloud data,and the concept of projection cluster is used to obtain cutting of the original target point cloud.

Key words: Point cloud model,Point cloud segmentation,PCA algorithm,Adaptive angle