Cross section extraction and measurement method and system based on point cloud slice

The invention relates to a section extraction and measurement method and system based on point cloud slices. The method comprises the following steps: obtaining a first point cloud set corresponding to a part model; determining a reference surface according to the first point cloud set; determining a vertical section according to the reference surface; determining target point cloud data in the first point cloud set according to the vertical section and the first point cloud set, and determining a second point cloud set according to the target point cloud data; and determining the section contour of the part model according to the second point cloud set. The problems that the data size of the point cloud data is large, and the spatial data of the part contour cannot be directly obtained from the point cloud data of three-dimensional modeling are solved. 本发明涉及一种基于点云切片的截面提取及测量方法及系统，包括以下步骤：获取零件模型对应的第一点云集；根据第一点云集，确定基准面；根据基准面，确定垂直切面；根据垂直切面和第一点云集，确定第一点云集中的目标点云数据，并根据各个目标点云数据，确定第二点云集；根据第二点云集，确定零件模型的截面轮廓。解决了点云数据的数据量庞大