In plain words: They paint a 3D scene stored in a neural network that renders views from any angle, switching between training the scene and applying style so it fits in memory. Painting each frame flickers when the camera moves; the look stays steady from any angle.
Abstract
This paper presents a stylized novel view synthesis method. Applying state-of-the-art stylization methods to novel views frame by frame often causes jittering artifacts due to the lack of cross-view consistency. Therefore, this paper investigates 3D scene stylization that provides a strong inductive bias for consistent novel view synthesis. Specifically, we adopt the emerging neural radiance fields (NeRF) as our choice of 3D scene representation for their capability to render high-quality novel views for a variety of scenes. However, as rendering a novel view from a NeRF requires a large number of samples, training a stylized NeRF requires a large amount of GPU memory that goes beyond an off-the-shelf GPU capacity. We introduce a new training method to address this problem by alternating the NeRF and stylization optimization steps. Such a method enables us to make full use of our hardware memory capacity to both generate images at higher resolution and adopt more expressive image style transfer methods. Our experiments show that our method produces stylized NeRFs for a wide range of content, including indoor, outdoor and dynamic scenes, and synthesizes high-quality novel views with cross-view consistency.
Thu Nguyen-Phuoc, Feng Liu, Lei Xiao
arXiv:2207.02363 · cs.CV · submitted Jul 5, 2022
abstract · pdf · html · SIGGRAPH 2022 (Journal track). Project page: https://research.facebook.com/publications/snerf-stylized-neural-implicit-representations-for-3d-scenes/