OLM-SLAM: online lifelong memory system for simultaneous localization and mapping

• Published in: Measurement science & technology Vol. 36; no. 1; p. 16328
• Main Authors: Lu, Haoran, Shen, Yehu, Zhang, Qingkui, Jiang, Quansheng, Zhu, Qixin, Fu, Guizhong, Niu, Xuemei, Li, Jingbin
• Format: Journal Article
• Language: English
• Published: 31.01.2025
• ISSN: 0957-0233; 1361-6501
• DOI: 10.1088/1361-6501/ad9347

Simultaneous Localization and Mapping is a fundamental task for robots in unknown environments. However, the poor generalization ability of learning-based algorithms in unknown environments hinders their widespread adoption. Additionally, artificial neural networks are subject to catastrophic forgetting. We propose a lifelong SLAM framework called OLM-SLAM that effectively solves the neural network catastrophic forgetting problem. To ensure the generalization of the neural network, this paper proposes a method for the sensitivity analysis of the network weight parameters. Meanwhile, inspired by human memory storage mechanisms, we design a dual memory storages mechanism that retains dynamic memory and static memory. A novel memory filtering mechanism is proposed to maximize image diversity within a fixed-size memory storage area addressing the problem of limited storage capacity of embedded devices in real-world situations. We have extensively evaluated the model on a variety of real-world datasets. Compared with CL-SLAM, the overall translation error of the test sequence is improved by 44.9%. The translation and rotation errors of Retention Ability (RA) were improved by 111.6% and 66.7%, respectively. The results demonstrate that OLM-SLAM can outperform previous methods of the same type, and OLM-SLAM has high RA when facing different sequences of the same type of environment.