Author Affiliations
1 School of Automation, Southeast University, Nanjing, Jiangsu 210096, China2 Key Laboratory of Measurement and Control of Complex Systems of Engineering, Ministry of Education, Nanjing, Jiangsu 210096, Chinashow less
Fig. 1. Flowchart of the proposed algorithm
Fig. 2. Bounding box schematic and local enlargement details. (a) Bounding box schematic of kettle model; (b) local enlargement details of kettle model; (c) bounding box schematic of bunny model; (d) local enlargement details of bunny model
Fig. 3. Octree segmentation, each voxel containing at least one point. (a) n=1, Pvoxel=9; (b) n=2, Pvoxel=40; (c) n=3, Pvoxel=137; (d) n=4, Pvoxel=435; (e)n=5, Pvoxel=1426; (f) n=6, Pvoxel=4815; (g) n=7, Pvoxel=15845; (h) n=8, Pvoxel=45859
Fig. 4. Mask architecture of two layer octree
Fig. 5. Detail encoding of point position
Fig. 6. Point cloud models used in experiment. (a) Bunny model, point is 31607; (b) cat model, point is 10000; (c) kettle model, point is 19062; (d) face model, point is 46111; (e) plastic model, point is 24673
Fig. 7. Results of removing outliers. (a) Initial data; (b) point cloud data after removing outliers; (c) removed outliers
Fig. 8. Decompression schematic of bunny model. (a) Bunny model before decompression; (b) local amplification details of Fig. (a); (c) decompression result when t=0.25; (d) local amplification details of Fig. (c); (e) decompression result when t=0.005; (f) local amplification details of Fig. (e)
Fig. 9. Comparison of compression ratio and compression time
Model | λ | Number of plies | t |
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Kettle | 0.00180 | 7 | 0.0042 | Plastic | 0.00183 | 8 | 0.0050 |
|
Table 1. Octree segmentation