arXiv:2505.22416cs.GRcs.CV2025-05被引 6

让任意人脸网格都能精准还原表情细节并自由控制。

Neural Face Skinning for Mesh-agnostic Facial Expression Cloning

  • 用局部权重将全局表情代码聚焦到具体区域,实现精细控制。
  • 在不同结构的网格上均表现更优,表情还原度提升显著。
  • 适合需要高精度表情克隆与编辑的动画制作人员。

准确地将面部表情重定向到目标面网格并支持灵活操控,是面部动画重定向的核心挑战。现有深度学习方法通过全局隐变量编码表情,但常忽略局部细节。部分方法虽通过局部变形传递提升局部精度,却增加整体控制复杂度。为此,本文提出结合全局与局部变形优势的新方法:通过预定义分割标签的间接监督,学习目标网格各顶点的皮肤权重,使全局隐变量的影响局部化,从而在未见形状的网格上实现精确且区域特异的形变。我们采用基于面部动作编码系统(FACS)的混合形状对隐变量进行监督,确保表达可解释性,并支持直观编辑生成动画。大量实验表明,该方法在表情保真度、形变迁移准确率及跨多样网格结构的适应性方面均优于当前最优方法。

原文摘要 · Abstract (English)

Accurately retargeting facial expressions to a face mesh while enabling manipulation is a key challenge in facial animation retargeting. Recent deep-learning methods address this by encoding facial expressions into a global latent code, but they often fail to capture fine-grained details in local regions. While some methods improve local accuracy by transferring deformations locally, this often complicates overall control of the facial expression. To address this, we propose a method that combines the strengths of both global and local deformation models. Our approach enables intuitive control and detailed expression cloning across diverse face meshes, regardless of their underlying structures. The core idea is to localize the influence of the global latent code on the target mesh. Our model learns to predict skinning weights for each vertex of the target face mesh through indirect supervision from predefined segmentation labels. These predicted weights localize the global latent code, enabling precise and region-specific deformations even for meshes with unseen shapes. We supervise the latent code using Facial Action Coding System (FACS)-based blendshapes to ensure interpretability and allow straightforward editing of the generated animation. Through extensive experiments, we demonstrate improved performance over state-of-the-art methods in terms of expression fidelity, deformation transfer accuracy, and adaptability across diverse mesh structures.

表情克隆网格无关皮肤权重面部动画

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