In this paper, we propose a new method for mapping a 3D point cloud to the latent space of a 3D generative adversarial network. Our generative model for 3D point clouds is based on SP-GAN, a state-of-the-art sphere-guided 3D point cloud generator. We derive an efficient way to encode an input 3D point cloud to the latent space of the SP-GAN. Our point cloud encoder can resolve the point ordering issue during inversion, and thus can determine the correspondences between points in the generated 3D point cloud and those in the canonical sphere used by the generator. We show that our method outperforms previous GAN inversion methods for 3D point clouds, achieving state-of-the-art results both quantitatively and qualitatively. Our code is available at https://github.com/hkust-vgd/point_inverter.

本文提出了一种新的方法，将三维点云映射到三维生成对抗网络的潜在空间。我们的生成模型基于SP-GAN，它是一种最先进的球引导三维点云生成器。我们提出了一种有效的编码方式，可将输入的三维点云编码到SP-GAN的潜在空间中。我们的对点云编码器可以解决反演过程中的点排序问题，从而确定生成的三维点云中的点与生成器使用的规范球中的点之间的对应关系。我们展示了我们的方法在三维点云的GAN反演上优于以前的方法，定量和定性地获得了最先进的结果。我们的代码可在此 https URL 上获得。

PointInverter: 利用具有形状先验知识的生成模型进行点云重建和编辑