Fig 1.
Point cloud coarse alignment process.
Fig 2.
(a) Free-form data after noise addition. (b) Single filtering. (c) This paper filtering.
Table 1.
Number of noise points removed by different filters.
Fig 3.
Original point cloud data.
Fig 4.
Original method (deficiency).
Fig 5.
Sampling by this method.
Fig 6.
SHOT feature division.
Fig 7.
Visual feature matching.
Fig 8.
Point cloud edge feature extraction.
Fig 9.
After false match rejection.
Fig 10.
Processing and measuring equipment.
(a) Free-form machining. (b) Workpiece model. (c) Free-form surface measurement. (d) Self-measured point cloud data.
Table 2.
Analysis of the results of the rough alignment experiments.
Fig 11.
(a) Bunny point cloud data. (b) Free-form surface.