提出新型点云修复框架,统一处理缺失、噪声等多种退化问题。
PQDT: Pseudo-Query Dual Transformer for Robust Point Cloud Restoration

- 用伪查询机制在Transformer中分两阶段重构几何结构
- 在多个基准上优于当前最优方法,可应对复杂退化组合
- 适合需要鲁棒3D感知的自动驾驶与机器人应用
点云是计算机视觉中的基础3D表示,广泛用于各类感知任务。然而真实场景下的点云常因传感器限制或遮挡导致不完整、含噪、异常点及密度不均等问题。从退化数据中恢复清晰、细节丰富的形状对下游应用至关重要。现有基于学习的方法虽在单任务如补全或去噪上取得进展,但通常依赖全局瓶颈特征,损失细粒度几何信息且对输入质量变化敏感。本文提出一种统一的3D修复网络,直接以点云为输入,自适应地在多种退化场景下重建高质量几何结构。核心在于基于Transformer骨干的伪查询模块,将几何变换重构为两个协同阶段,提升结构清晰度、鲁棒性及局部细节保留能力。在多个精心构建的基准测试中,该方法超越当前最优性能,有效处理补全、形变与去噪的复杂组合。本工作提供了一种新颖的纯点云骨干统一框架,推动更灵活的3D感知发展。
原文摘要 · Abstract (English)
Point clouds are a fundamental 3D representation in computer vision, enabling a wide range of perception tasks. However, real-world point clouds often suffer from degradations such as incompleteness, noise, outliers, and irregular density, caused by sensor limitations or occlusions. Recovering clean and detailed shapes from such degraded data is crucial for downstream applications. While existing learning-based methods achieve progress on individual tasks like completion or denoising, they typically rely on global bottleneck features, which lose fine-grained geometry and remain sensitive to varying input quality. We propose a unified 3D restoration network that directly takes point clouds as input and adaptively reconstructs high-quality geometry under diverse degradation scenarios. At the core of our approach is a Pseudo-Query module, implemented within a Transformer backbone, which reformulates geometric translation into two cooperative stages to enhance structural clarity, robustness, and local detail preservation. Extensive experiments on curated benchmarks demonstrate that our approach surpasses state-of-the-art performance in general 3D restoration. It effectively handles complex combinations of completion, deformation, and denoising degradations. With this work, we provide a novel unified, point-only backbone for robust 3D restoration, enabling more versatile 3D perception.
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