Abstract:

Human portraits exhibit various appearances when observed from different views under different lighting conditions. We can easily imagine how the face will look like in another setup, but computer algorithms still fail on this problem given limited observations. To this end, we present a system for portrait view synthesis and relighting: given multiple portraits, we use a neural network to predict the light-transport field in 3D space, and from the predicted Neural Light-transport Field (NeLF) produce a portrait from a new camera view under a new environmental lighting. Our system is trained on a large number of synthetic models, and can generalize to different synthetic and real portraits under various lighting conditions. Our method achieves simultaneous view synthesis and relighting given multi-view portraits as the input, and achieves state-of-the-art results.

Download

Paper
Code

Bibtex

@inproceedings {sun2021nelf,
    booktitle = {Eurographics Symposium on Rendering},
    title = {NeLF: Neural Light-transport Field for Portrait View Synthesis and Relighting},
    author = {Sun, Tiancheng and Lin, Kai-En and Bi, Sai and Xu, Zexiang and Ramamoorthi, Ravi},
    year = {2021},
}