Chinese Journal of Lasers, Volume. 44, Issue 10, 1010006(2017)
Segmentation of Point Cloud in Tank of Plane Bulkhead Type
Figures & Tables(10)
Fig. 2. Normals in spherical coordinates. (a) Spherical coordinate; (b) EGI; (c) irrelevant normal removal
Fig. 4. Data incompleteness of longitudinal bulkhead plate. (a) Data acquisition; (b) point cloud of longitudinal plane bulkhead
Fig. 6. Grayscale, size information and registered point cloud of experimental data. (a) Image of tank A; (b) image of tank B; (c) point cloud of tank A; (d) point cloud of tank B
Fig. 7. Point cloud segmentation results of tank A. (a) Original point cloud; (b) bulkhead plate segmentation; (c) floor segmentation; (d) horizontal girder segmentation; (e) stiffener segmentation; (f) transverse framing member mergence
Fig. 8. Detail maps of point cloud segmentation results of tank B. (a) Original point cloud; (b) segmentation result; (c) detail of segmentation result
Table 1. Parameters of experiment
View tableTable 1. Parameters of experiment
Parameter Descriptor Value t SThickness of seed sets for bulkhead plate segmentation 3 m ε Maximum number of iterations for RANSAC method 1000 d BMaximum distance from points to planar model for bulkhead plate segmentation 4 cm d FMaximum distance from points to planar model for floor segmentation 4 cm d HGMaximum distance from points to planar model for horizontal girder segmentation 18 cm t HGDistance threshold from points to the nearest longitudinal bulkhead plate for horizontal girder segmentation 1 m t DLDistance threshold from points to deck for deck longitudinal segmentation 0.5 m t LSDistance threshold from points to bulkhead plate for longitudinal-bulkhead-plate-stiffener segmentation 0.5 m t TSDistance threshold from points to bulkhead plate for transverse-bulkhead-plate-stiffener segmentation 0.6 m t TFMDistance threshold from points to floor for transverse framing member segmentation 0.8 m
Table 2. Analysis of segmentation results
View tableTable 2. Analysis of segmentation results
Member Tank A Tank B Precision /% Recall /% Precision /% Recall /% Inner bottom platting 98.46 99.94 98.31 99.90 Deck 98.82 99.89 98.10 99.92 Longitudinal bulkhead plate 97.23 98.77 98.13 99.78 Transverse bulkhead plate 98.79 99.03 98.91 99.85 Margin plate 99.78 97.91 Transverse framing member 99.65 98.13 99.48 99.01 Horizontal girder 98.63 98.01 99.72 97.52 Stiffener 97.56 95.76 96.49 94.61
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Yang Zexin, Cheng Xiaojun, Li Quan, Hu Minjie, Ou Jian, Xin Peikang, Guo Wang. Segmentation of Point Cloud in Tank of Plane Bulkhead Type[J]. Chinese Journal of Lasers, 2017, 44(10): 1010006
Paper Information
Category: Remote Sensing and Sensors
Received: May. 17, 2017
Accepted: --
Published Online: Oct. 18, 2017
The Author Email: Yang Zexin (zxyang15@163.com)
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