filename     : Yan24a.pdf
entry        : inproceedings
conference   : SIGGRAPH 2024, Denver, US, 28 July–1 August, 2024
pages        : 1-14
year         : 2024
month        : December
title        : Learning a Generalized Physical Face Model From Data
subtitle     :
author       : Lingchen Yang, Gaspard Zoss, Prashanth Chandran, Markus Gross, Barbara Solenthaler, Eftychios Sifakis, Derek Bradley
booktitle    : ACM Transactions on Graphics (TOG) - SIGGRAPH 2024 Conference Proceedings
editor       : ACM New York, NY, USA 
publisher    : Association for Computing Machinery
publ.place   : New York, NY, USA
volume       : 43
issue        : 4
language     : English
keywords     : Differentiable Physics, Deep Learning, Digital Human
abstract     : Physically-based simulation is a powerful approach for 3D facial animation as the resulting deformations are governed by physical constraints, allowing to easily resolve self-collisions, respond to external forces and perform realistic anatomy edits. Today's methods are data-driven, where the actuations for finite elements are inferred from captured skin geometry. Unfortunately, these approaches have not been widely adopted due to the complexity of initializing the material space and learning the deformation model for each character separately, which often requires a skilled artist followed by lengthy network training. In this work, we aim to make physics-based facial animation more accessible by proposing a generalized physical face model that we learn from a large 3D face dataset. Once trained, our model can be quickly fit to any unseen identity and produce a ready-to-animate physical face model automatically. Fitting is as easy as providing a single 3D face scan, or even a single face image. After fitting, we offer intuitive animation controls, as well as the ability to retarget animations across characters. All the while, the resulting animations allow for physical effects like collision avoidance, gravity, paralysis, bone reshaping and more.