In plain words: A system turns a text prompt into a 3D point cloud by first drawing one picture from the words, then using a second model to build the 3D shape from that picture. It needs just 1-2 minutes on one GPU, 10-100 times faster than the best text-to-3D tools, though its shapes look worse.
Abstract
While recent work on text-conditional 3D object generation has shown promising results, the state-of-the-art methods typically require multiple GPU-hours to produce a single sample. This is in stark contrast to state-of-the-art generative image models, which produce samples in a number of seconds or minutes. In this paper, we explore an alternative method for 3D object generation which produces 3D models in only 1-2 minutes on a single GPU. Our method first generates a single synthetic view using a text-to-image diffusion model, and then produces a 3D point cloud using a second diffusion model which conditions on the generated image. While our method still falls short of the state-of-the-art in terms of sample quality, it is one to two orders of magnitude faster to sample from, offering a practical trade-off for some use cases. We release our pre-trained point cloud diffusion models, as well as evaluation code and models, at https://github.com/openai/point-e.
Alex Nichol, Heewoo Jun, Prafulla Dhariwal, Pamela Mishkin, Mark Chen
arXiv:2212.08751 · cs.CV, cs.LG · submitted Dec 16, 2022
abstract · pdf · html · 8 pages, 11 figures