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arXiv 2408.12062cs.CVcs.AI
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增强针对损坏的点云分类采样协议

Enhancing Sampling Protocol for Point Cloud Classification Against Corruptions

School of Computing and Artificial Intelligence, Southwest Jiaotong University(西南交通大学计算机与人工智能学院);College of Computing, City University of Hong Kong(香港城市大学计算机学院);SWJTU-Leeds Joint School, Southwest Jiaotong University(西南交通大学-利兹学院)

Chongshou Li, Pin Tang, Xinke Li, Yuheng Liu, Tianrui Li

AI总结:

针对3D点云采样协议在噪声下鲁棒性差的问题,提出架构无关的增强采样协议PointSP,通过关键点重加权、局部-全局平衡下采样和切平面插值提升抗损坏能力,在多个基准上显著提高分类准确性与鲁棒性。

摘要:

3D点云学习中已有的采样协议,如最远点采样(FPS)和固定样本大小(FSS),长期以来一直被依赖。然而,现实世界的数据经常遭受损坏,例如传感器噪声,这违反了当前协议中关于良性数据的假设。因此,这些协议极易受到噪声影响,在自动驾驶等关键应用中构成重大安全风险。为了解决这些问题,我们提出了一种增强的点云采样协议PointSP,旨在提高对点云损坏的鲁棒性。PointSP结合了关键点重新加权,以减轻对异常值的敏感性并确保选择具有代表性的点。它还引入了局部-全局平衡下采样策略,在保持几何一致性的同时实现可扩展和自适应的采样。此外,使用轻量级切平面插值方法来保留局部几何形状,同时增强点云的密度。与需要额外模型训练的基于学习的方法不同,PointSP是架构无关的,不需要对网络进行额外的学习或修改。这使得它能够无缝集成到现有流程中。在合成和现实世界损坏数据集上的大量实验表明,PointSP显著提高了点云分类的鲁棒性和准确性,在多个基准上优于最先进的方法。

英文摘要:

Established sampling protocols for 3D point cloud learning, such as Farthest Point Sampling (FPS) and Fixed Sample Size (FSS), have long been relied upon. However, real-world data often suffer from corruptions, such as sensor noise, which violates the benign data assumption in current protocols. As a result, these protocols are highly vulnerable to noise, posing significant safety risks in critical applications like autonomous driving. To address these issues, we propose an enhanced point cloud sampling protocol, PointSP, designed to improve robustness against point cloud corruptions. PointSP incorporates key point reweighting to mitigate outlier sensitivity and ensure the selection of representative points. It also introduces a local-global balanced downsampling strategy, which allows for scalable and adaptive sampling while maintaining geometric consistency. Additionally, a lightweight tangent plane interpolation method is used to preserve local geometry while enhancing the density of the point cloud. Unlike learning-based approaches that require additional model training, PointSP is architecture-agnostic, requiring no extra learning or modification to the network. This enables seamless integration into existing pipelines. Extensive experiments on synthetic and real-world corrupted datasets show that PointSP significantly improves the robustness and accuracy of point cloud classification, outperforming state-of-the-art methods across multiple benchmarks.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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