Recent approaches representing 3D objects and scenes using Gaussian splats
show increased rendering speed across a variety of platforms and devices. While
rendering such representations is indeed extremely efficient, storing and
transmitting them is often prohibitively expensive. To represent large-scale
scenes, one often needs to store millions of 3D Gaussians, occupying gigabytes
of disk space. This poses a very practical limitation, prohibiting widespread
adoption.Several solutions have been proposed to strike a balance between disk
size and rendering quality, noticeably reducing the visual quality. In this
work, we propose a new representation that dramatically reduces the hard drive
footprint while featuring similar or improved quality when compared to the
standard 3D Gaussian splats. When compared to other compact solutions, ours
offers higher quality renderings with significantly reduced storage, being able
to efficiently run on a mobile device in real-time. Our key observation is that
nearby points in the scene can share similar representations. Hence, only a
small ratio of 3D points needs to be stored. We introduce an approach to
identify such points which are called parent points. The discarded points
called children points along with attributes can be efficiently predicted by
tiny MLPs.

这篇论文主要研究了使用高斯喷洒表示三维物体和场景，以提高渲染速度，但存储和传输开销较大的问题。作者提出了一种新的表示方法，在保持类似或改善质量的同时极大地减小硬盘占用空间，并能够在移动设备上实时高效地运行。他们的关键观察是场景中的相邻点可以共享相似的表示，因此只需要存储少量的三维点。作者还引入了一种方法来识别这些相邻点，称为父点，通过小型多层感知器可以有效地预测被丢弃的子点及其属性。