BUFFER-X: Towards Zero-Shot Point Cloud Registration in Diverse Scenes

• URL: http://arxiv.org/abs/2503.07940v1
• Date: Tue, 11 Mar 2025 00:40:45 GMT
• Title: BUFFER-X: Towards Zero-Shot Point Cloud Registration in Diverse Scenes
• Authors: Minkyun Seo, Hyungtae Lim, Kanghee Lee, Luca Carlone, Jaesik Park,
• Abstract summary: Key factors limiting generalization are reliance on environment-specific voxel size and search radius, poor out-of-domain robustness of learning-based keypoint detectors, and raw coordinate usage.<n>We present a zero-shot registration pipeline called BUFFER-X by adaptively determining voxel size/search radius, using farthest point sampling to bypass learned detectors, and (c) leveraging patch-wise scale normalization for consistent coordinate bounds.
• Score: 34.71850178233064
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Recent advances in deep learning-based point cloud registration have improved generalization, yet most methods still require retraining or manual parameter tuning for each new environment. In this paper, we identify three key factors limiting generalization: (a) reliance on environment-specific voxel size and search radius, (b) poor out-of-domain robustness of learning-based keypoint detectors, and (c) raw coordinate usage, which exacerbates scale discrepancies. To address these issues, we present a zero-shot registration pipeline called BUFFER-X by (a) adaptively determining voxel size/search radii, (b) using farthest point sampling to bypass learned detectors, and (c) leveraging patch-wise scale normalization for consistent coordinate bounds. In particular, we present a multi-scale patch-based descriptor generation and a hierarchical inlier search across scales to improve robustness in diverse scenes. We also propose a novel generalizability benchmark using 11 datasets that cover various indoor/outdoor scenarios and sensor modalities, demonstrating that BUFFER-X achieves substantial generalization without prior information or manual parameter tuning for the test datasets. Our code is available at https://github.com/MIT-SPARK/BUFFER-X.

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