Point clouds have become increasingly vital across various applications thanks to their ability to realistically depict 3D objects and scenes. Nevertheless, effectively compressing unstructured, high-precision point cloud data remains a significant challenge. In this paper, we present a pioneering point cloud compression framework capable of handling both geometry and attribute components. Unlike traditional approaches and existing learning-based methods, our framework utilizes two coordinate-based neural networks to implicitly represent a voxelized point cloud. The first network generates the occupancy status of a voxel, while the second network determines the attributes of an occupied voxel. To tackle an immense number of voxels within the volumetric space, we partition the space into smaller cubes and focus solely on voxels within non-empty cubes. By feeding the coordinates of these voxels into the respective networks, we reconstruct the geometry and attribute components of the original point cloud. The neural network parameters are further quantized and compressed. Experimental results underscore the superior performance of our proposed method compared to the octree-based approach employed in the latest G-PCC standards. Moreover, our method exhibits high universality when contrasted with existing learning-based techniques.

本论文介绍了一个能够处理几何和属性组件的点云压缩框架，利用两个基于坐标的神经网络来隐式表示体素化的点云，通过将空间划分为小的立方体并专注于非空立方体内的体素来重建原始点云的几何和属性组件。实验结果表明，与最新的G-PCC标准中采用的八叉树方法相比，我们提出的方法具有更优越的性能，并且与现有的基于学习的技术相比具有高度的普适性。

使用隐式神经表示的点云压缩：一个统一框架