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Aggregate Point Cloud Geometric Features for Processing

Yinghao Li1,2,3, Renbo Xia1,2,*, Jibin Zhao1,2,*, Yueling Chen1,2, Liming Tao1,2,3, Hangbo Zou1,2,3, Tao Zhang1,2,3

1 Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang, 110016, China
2 Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang, 110169, China
3 University of Chinese Academy of Sciences, Beijing, 100049, China

* Corresponding Authors: Renbo Xia. Email: ; Jibin Zhao. Email:

(This article belongs to this Special Issue: Recent Advances in Virtual Reality)

Computer Modeling in Engineering & Sciences 2023, 136(1), 555-571. https://doi.org/10.32604/cmes.2023.024470

Abstract

As 3D acquisition technology develops and 3D sensors become increasingly affordable, large quantities of 3D point cloud data are emerging. How to effectively learn and extract the geometric features from these point clouds has become an urgent problem to be solved. The point cloud geometric information is hidden in disordered, unstructured points, making point cloud analysis a very challenging problem. To address this problem, we propose a novel network framework, called Tree Graph Network (TGNet), which can sample, group, and aggregate local geometric features. Specifically, we construct a Tree Graph by explicit rules, which consists of curves extending in all directions in point cloud feature space, and then aggregate the features of the graph through a cross-attention mechanism. In this way, we incorporate more point cloud geometric structure information into the representation of local geometric features, which makes our network perform better. Our model performs well on several basic point clouds processing tasks such as classification, segmentation, and normal estimation, demonstrating the effectiveness and superiority of our network. Furthermore, we provide ablation experiments and visualizations to better understand our network.

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Cite This Article

Li, Y., Xia, R., Zhao, J., Chen, Y., Tao, L. et al. (2023). Aggregate Point Cloud Geometric Features for Processing. CMES-Computer Modeling in Engineering & Sciences, 136(1), 555–571.



This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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