Thin-walled cylinder size precision analysis and AR visualization method based on point cloud

The invention discloses a thin-walled cylinder size precision analysis and AR visualization method based on a point cloud, and the method comprises the steps: carrying out the differential division of a thin-walled cylinder point cloud into slices, carrying out the fitting of an axis through the central point of each slice, calculating an out-of-tolerance part, removing the out-of-tolerance part and a neighborhood point cloud, continuing the differential-slicing-fitting-point removal, and carrying out the iterative circulation, therefore, the size out-of-tolerance part of the thin-walled cylinder is accurately calculated, the mark point cloud is segmented, the mark pose is solved and used for virtual-real fusion registration of the point cloud, and the size precision analysis result is superposed on the entity of the thin-walled cylinder and used for guiding shape correction. According to the method, automatic analysis of the thin-walled cylinder size error can be realized, the influence of an out-of-toleranc