Accurate 3D Facial Paralysis Analysis Using Multi-View Infrared Structured Light System

Facial paralysis is a prevalent disorder affecting the facial nerve. In clinical settings, the severity of facial paralysis is typically assessed by physicians based on their subjective experience, evaluating the range of facial muscle movements and facial symmetry. To address these limitations, this paper proposes a method for the quantifiable evaluation of facial paralysis. We have developed a multi-view real-time facial acquisition system utilizing three infrared structured light units, enabling high-precision dynamic capture. Through non-rigid registration of the collected point cloud sequences, we generated a unified topological mesh sequence. Subsequently, we employed a novel facial asymmetry operator to quantitatively assess facial paralysis. Extensive experimental results demonstrate that the proposed method is both effective and accurate.