# PinNet: Keypoint-Aware Local Descriptors with Geometric Embedding for LiDAR SLAM Loop Closure Detection

- Source: arXiv cs.RO
- Published: 2026-10-19T04:00:00.000Z
- RoboHot: https://robohot.news/en/items/noxraszhq30owehc8xyyrb3le
- Original: https://arxiv.org/abs/2606.28637

## Summary

PinNet generates point cloud keypoints and their descriptors, and uses a plane-based geometric self-attention module to model spatial relationships between keypoints, thereby improving descriptor discriminability for loop closure detection and point cloud registration. The method was evaluated on datasets collected with various different LiDAR sensors; experimental results show strong place recognition performance, precise relative pose estimation, and successful single-shot localization in different environments.