基于特征的点云全局配准算法： NARF特征点提取+PFH描述子计算+SAC-IA位姿变换计算。(Feature based global registration algorithm for point cloud: The NARF feature points are extracted + PFH descr iptors, and the calculation of + SAC-IA position and attitude transformation is calculate

特征点提取，法向量估计，fpfh描叙特征点，SAC-IA粗配准。ICP精确配准(Feature point extraction, normal vector estimation, FPFH descr iption of feature points, sac-ia rough registration. Accurate registration of ICP)