对古建筑激光扫描点云进行分割、识别,并利用Hough变换和最小二乘法从点云中提取直线和圆,取得了较满意的结果。对两种算法的提取效果进行了比较。 The segmentation and recognition of point cloud of laser scanning in ancient architecture were made, and Hough transform and least square method were used to extract straight lines and circles from point cloud. Satisfactory results were obtained. The extraction results of the two algorithms are compared.