Laser & Optoelectronics Progress, Volume. 59, Issue 12, 1212001(2022)
Three-Dimensional Reconstruction and Calculation of Shape Parameters of Movable Cultural Relics
Figures & Tables(14)
Fig. 3. Variation trend of reconstructed rotation angle error with proportion of matching feature points
Fig. 4. Reconstruction results of sparse point cloud at different proportions of matching points. (a) 0.635; (b) 0.522; (c) 0.415; (d) 0.323; (e) 0.244; (f) 0.194; (g) 0.144; (h) 0.105
Fig. 5. Dense point cloud reconstruction results. (a) Front view; (b) side view; (c) vertical view
Fig. 6. Comparison of point cloud before and after denoising. (a) Before denoising; (b) after denoising
Fig. 7. Comparison before and after deleting outliers of point cloud. (a) Before deleting; (b) after deleting
Fig. 8. Reconstruction results of sparse point cloud at different proportions of matching points. (a) 0.582; (b) 0.483; (c) 0.398; (d) 0.321; (e) 0.191
Fig. 9. Before and after transformation of coordinate system of point cloud model. (a) Before transformation; (b) after transformation
Table 1. Proportion of matching feature points at different angular intervals
View tableTable 1. Proportion of matching feature points at different angular intervals
Angular interval /（°） 5 10 15 20 25 30 35 40 Proportion of matching feature points 0.635 0.522 0.415 0.323 0.244 0.194 0.144 0.105
Table 2. Number of sparse point clouds and dense point clouds reconstructed under different proportions of matching feature points
View tableTable 2. Number of sparse point clouds and dense point clouds reconstructed under different proportions of matching feature points
Proportion of matching feature points Number of sparse point clouds Number of dense point clouds Reconstruction time-consuming /min 0.635 56490 903597 23.5 0.522 38109 896083 10.6 0.415 24970 884367 9.2 0.323 20006 874717 7.6 0.244 16130 805342 7.2 0.194 10717 757275 5.7 0.144 7711 570826 4.3 0.105 5303 182643 2.1
Table 3. Reconstruction angle error and time-consuming at different proportions of matching points
View tableTable 3. Reconstruction angle error and time-consuming at different proportions of matching points
Proportion of matching feature points 0.582 0.483 0.398 0.321 0.191 0.092 Angular interval /（°） 3 6 9 12 15 18 Reconstructed rotation angle error /（°） 0.021 0.036 0.094 0.132 0.320 Failed Reconstruction time-consuming /min 25.2 12.1 10.6 8.8 5.4
Table 4. Results of shape parameters of vase calculated by improved oriented bounding box algorithm
View tableTable 4. Results of shape parameters of vase calculated by improved oriented bounding box algorithm
Serial number Shape parameter Length Width Height Diameter of bottom True value 122.932 140.088 255.285 96.009 1 122.83 140.13 255.45 95.94 2 123.13 140.01 255.36 95.92 3 122.92 139.91 255.48 96.12 4 123.04 139.94 255.23 95.83 5 122.81 140.05 255.52 95.93 6 122.75 139.98 255.12 95.78 7 122.74 140.18 255.34 96.02
Table 5. Comparison between original algorithm and proposed algorithm
View tableTable 5. Comparison between original algorithm and proposed algorithm
Project Shape parameter Length Width Height Diameter of bottom Original algorithm Standard deviation 0.238 0.138 0.247 0.153 Max error 0.337 -0.328 0.385 -0.339 Proposed algorithm Standard deviation 0.149 0.099 0.143 0.113 Max error -0.198 0.178 -0.235 0.229
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Zepeng Su, Min Zhao, Lingjian Zhu, Xiaogang Li, Wei Shao. Three-Dimensional Reconstruction and Calculation of Shape Parameters of Movable Cultural Relics[J]. Laser & Optoelectronics Progress, 2022, 59(12): 1212001
Paper Information
Category: Instrumentation, Measurement and Metrology
Received: Sep. 1, 2021
Accepted: Sep. 23, 2021
Published Online: May. 23, 2022
The Author Email: Min Zhao (zhaomin1973@xaut.edu.cn)
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