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arXiv · 2012.05903

Portrait Neural Radiance Fields from a Single Image

Chen Gao·Yichang Shih·Wei-Sheng Lai·Chia-Kai Liang·Jia-Bin Huang
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Abstract

We present a method for estimating Neural Radiance Fields (NeRF) from a single headshot portrait. While NeRF has demonstrated high-quality view synthesis, it requires multiple images of static scenes and thus impractical for casual captures and moving subjects. In this work, we propose to pretrain the weights of a multilayer perceptron (MLP), which implicitly models the volumetric density and colors, with a meta-learning framework using a light stage portrait dataset. To improve the generalization to unseen faces, we train the MLP in the canonical coordinate space approximated by 3D face morphable models. We quantitatively evaluate the method using controlled captures and demonstrate the generalization to real portrait images, showing favorable results against state-of-the-arts.

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Chen Gao, Yichang Shih, Wei-Sheng Lai, Chia-Kai Liang, Jia-Bin Huang. 2020-12-10. Portrait Neural Radiance Fields from a Single Image. https://arxiv.org/abs/2012.05903

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