Opening-Hole Repairing in Point Cloud Based on Improved Curve Contraction Flows

Qi, 张琦 Zhang; Suzhen, 蔺素珍 Lin; Jialu, 白佳璐 Bai; Jiarang, 钟家让 Zhong

doi:10.3788/lop55.091002

Cited by 2 publications

(2 citation statements)

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“…Liu Zhen [4] and others used the dynamic programming method to shrink the hole area boundary layer by layer and add surface details layer by layer to the area center through the characteristic line of the hole boundary to complete the hole repair. EA [5] et al Repair holes by creating contour curves in the boundaries. This algorithm can not only repair complex holes, but also repair holes in sharp areas.…”

Section: Introductionmentioning

confidence: 99%

Aero-engine compressor blades point cloud hole repairing method

Cai

Hao

Shi

2023

International Conference on Electronic Information Engineering and Computer Science (EIECS 2022)

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A new method for repairing point cloud model holes of aero-engine compressor blades is presented in this paper, which can be used to repair point cloud model holes of aero-engine compressor blades accurately. Firstly, by constructing the boundary diffusion mechanism, the generation judgment of hole repair points was defined, and the generation method of hole repair points based on boundary diffusion mechanism was designed, which unifies the diversified hole repair modes; Secondly, the implicit surface based on radial basis function was constructed, the position of repair points was corrected accurately, the repair area with uniform density was generated, and the hole repair was completed. Finally, it was verified by an example and compared with the central diffusion repair method. The results show that: By using the method in this paper, various holes in the point cloud model of aero-engine compressor blades, such as plane hole, curved face, island hole and cross-face, can be repaired evenly. It also avoids noise confusion caused by irregular hole boundary, and realizes better fitting between hole repair point and curved surface, thus providing accurate data support for aero-engine compressor blade damage detection.

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Section: Introductionmentioning

confidence: 99%

Aero-engine compressor blades point cloud hole repairing method

Cai

Hao

Shi

2023

International Conference on Electronic Information Engineering and Computer Science (EIECS 2022)

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show abstract

“…However, open holes cannot be repaired in this way because of the incompleteness of the adjacent information due to the lack of edge boundaries, which inevitably leads to poor repair effects or even problems beyond filling. Therefore, Zhang et al [15] proposed an open hole filling method based on an improved curve shortening flow method by extending a closed hole method based on point cloud data. However, this method can be used only for open holes with simple shapes.…”

Section: Introductionmentioning

confidence: 99%

A Parallel Method for Open Hole Filling in Large-Scale 3D Automatic Modeling Based on Oblique Photography

et al. 2021

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Common methods of filling open holes first reaggregate them into closed holes and then use a closed hole filling method to repair them. These methods have problems such as long calculation times, high memory consumption, and difficulties in filling large-area open holes. Hence, this paper proposes a parallel method for open hole filling in large-scale 3D automatic modeling. First, open holes are automatically identified and divided into two categories (internal and external). Second, the hierarchical relationships between the open holes are calculated in accordance with the adjacency relationships between partitioning cells, and the open holes are filled through propagation from the outer level to the inner level with topological closure and height projection transformation. Finally, the common boundaries between adjacent open holes are smoothed based on the Laplacian algorithm to achieve natural transitions between partitioning cells. Oblique photography data from an area of 28 km2 in Dongying, Shandong, were used for validation. The experimental results reveal the following: (i) Compared to the Han method, the proposed approach has a 12.4% higher filling success rate for internal open holes and increases the filling success rate for external open holes from 0% to 100%. (ii) Concerning filling efficiency, the Han method can achieve hole filling only in a small area, whereas with the proposed method, the size of the reconstruction area is not restricted. The time and memory consumption are improved by factors of approximately 4–5 and 7–21, respectively. (iii) In terms of filling accuracy, the two methods are basically the same.

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Opening-Hole Repairing in Point Cloud Based on Improved Curve Contraction Flows

Cited by 2 publications

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Aero-engine compressor blades point cloud hole repairing method

Aero-engine compressor blades point cloud hole repairing method

A Parallel Method for Open Hole Filling in Large-Scale 3D Automatic Modeling Based on Oblique Photography

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