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LiDAR-BIND-T: Improved and Temporally Consistent Sensor Modality Translation and Fusion for Robotic Applications

Created by
  • Haebom

Author

Niels Balemans, Ali Anwar, Jan Steckel, Siegfried Mercelis

Outline

This paper proposes a technique that explicitly enhances temporal consistency by extending LiDAR-BIND, a modular multimodal fusion framework that combines heterogeneous sensors (radar and sonar) into a LiDAR-defined latent space. Key contributions include (i) temporal embedding similarity, which aligns continuous latent representations; (ii) a motion-aligned loss, which matches displacements between predictions and ground-based LiDAR; and (iii) window-based temporal fusion using a specialized temporal module. Furthermore, we update the model architecture to better preserve spatial structure. Evaluation of the radar/sonar-to-LiDAR conversion demonstrates improved temporal and spatial consistency, leading to reduced absolute trajectory error and improved occupancy map accuracy in cartographer-based SLAM. We propose various metrics based on the Frequent Video Motion Distance (FVMD) and the correlation peak distance metric, providing practical temporal quality metrics for evaluating SLAM performance. The proposed Temporal LiDAR-BIND (LiDAR-BIND-T) significantly improves temporal stability while maintaining modular modality fusion, thereby enhancing the robustness and performance of downstream SLAM.

Takeaways, Limitations

Takeaways:
Improving SLAM performance (reducing absolute trajectory error, improving occupancy map accuracy) through techniques that explicitly enforce temporal consistency.
Maintaining the flexibility of a modular multi-modal fusion framework.
Providing SLAM performance evaluation metrics using FVMD and correlation peak distance metrics.
Limitations:
The specific Limitations is not specified based on the paper alone (e.g., it may only be suitable for certain sensor combinations, increases computational cost, etc.).
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