Residential College | false |
Status | 已發表Published |
HiTPR: Hierarchical Transformer for Place Recognition in Point Cloud | |
Zhixing Hou1; Yan Yan1; Chengzhong Xu2; Hui Kong3 | |
2022-05 | |
Conference Name | IEEE International Conference on Robotics and Automation (ICRA) |
Source Publication | 2022 International Conference on Robotics and Automation (ICRA) |
Conference Date | 23-27 May 2022 |
Conference Place | Philadelphia, PA, USA |
Abstract | Place recognition or loop closure detection is one of the core components in a full SLAM system. In this paper, aiming at strengthening the relevancy of local neighboring points and the contextual dependency among global points simultaneously, we investigate the exploitation of transformer-based network for feature extraction, and propose a Hierarchical Transformer for Place Recognition (HiTPR). The HiTPR consists of four major parts: point cell generation, short-range transformer (SRT), long-range transformer (LRT) and global descriptor aggregation. Specifically, the point cloud is initially divided into a sequence of small cells by down-sampling and nearest neighbors searching. In the SRT, we extract the local feature for each point cell. While in the LRT, we build the global dependency among all of the point cells in the whole point cloud. Experiments on several standard benchmarks demonstrate the superiority of the HiTPR in terms of average recall rate, achieving 93.71 % at top 1 % and 86.63 % at top 1 on the Oxford RobotCar dataset for example. |
Keyword | Place Recognition Loop Closure Detection Hierarchical Transformer Point Cloud |
DOI | 10.1109/ICRA46639.2022.9811737 |
Scopus ID | 2-s2.0-85136322609 |
Fulltext Access | |
Citation statistics | |
Document Type | Conference paper |
Collection | DEPARTMENT OF COMPUTER AND INFORMATION SCIENCE Faculty of Science and Technology THE STATE KEY LABORATORY OF INTERNET OF THINGS FOR SMART CITY (UNIVERSITY OF MACAU) |
Corresponding Author | Hui Kong |
Affiliation | 1.School of Computer Science and Engineering, Nanjing University of Science and Technology, Nanjing, China 2.Department of Computer Science, University of Macau, Macau, China 3.Faculty of Science and Technology, University of Macau, Macau, China |
Corresponding Author Affilication | Faculty of Science and Technology |
Recommended Citation GB/T 7714 | Zhixing Hou,Yan Yan,Chengzhong Xu,et al. HiTPR: Hierarchical Transformer for Place Recognition in Point Cloud[C], 2022. |
APA | Zhixing Hou., Yan Yan., Chengzhong Xu., & Hui Kong (2022). HiTPR: Hierarchical Transformer for Place Recognition in Point Cloud. 2022 International Conference on Robotics and Automation (ICRA). |
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