Point cloud denoising aims to restore clean point clouds from raw observations corrupted by noise and outliers while preserving the fine-grained details. We present a novel deep learning-based denoising model, that incorporates normalizing flows and noise disentanglement techniques to achieve high denoising accuracy. Unlike existing works that extract features of point clouds for point-wise correction, we formulate the denoising process from the perspective of distribution learning and feature disentanglement. By considering noisy point clouds as a joint distribution of clean points and noise, the denoised results can be derived from disentangling the noise counterpart from latent point representation, and the mapping between Euclidean and latent spaces is modeled by normalizing flows. We evaluate our method on synthesized 3D models and real-world datasets with various noise settings. Qualitative and quantitative results show that our method outperforms previous state-of-the-art deep learning-based approaches. %in terms of detail preservation and distribution uniformity.

介绍一种基于深度学习、归一化流以及噪音解缠技术的点云去噪方法，通过对噪声进行解缠并建立欧几里得空间和潜在空间之间的映射，从而实现高精度的去噪。在合成和真实世界数据集上的定性和定量实验表明，其性能优于现有的基于深度学习的方法。

PD-Flow：一种带有归一化流的点云去噪框架