Kaifeng Zou Sylvain Faisan Boyang Yu 0002 Sébastien Valette Hyewon Seo 4D Facial Expression Diffusion Model. 2023 abs/2303.16611 CoRR https://doi.org/10.48550/arXiv.2303.16611 db/journals/corr/corr2303.html#abs-2303-16611