仅用表面波视频就能推算材料内部厚度和刚度。
Visual Surface Wave Elastography: Revealing Subsurface Physical Properties via Visible Surface Waves
- 从视频中提取波动色散关系，反演物理参数。
- 模拟与真实数据均与真实值高度吻合。
- 适合医疗健康监测和人机交互场景。
材料表面的波传播蕴含其内部物理属性信息。本文提出一种仅通过表面波视频推断结构厚度与刚度的方法。该方法从视频中提取色散关系，再通过基于物理的优化问题求解最优的厚度与刚度参数。我们在模拟与真实数据上验证了该方法，结果均与真实测量值高度一致。该技术为居家健康监测组织力学特性提供了可行性验证，并可拓展至人机交互等领域。
原文摘要 · Abstract (English)
Wave propagation on the surface of a material contains information about physical properties beneath its surface. We propose a method for inferring the thickness and stiffness of a structure from just a video of waves on its surface. Our method works by extracting a dispersion relation from the video and then solving a physics-based optimization problem to find the best-fitting thickness and stiffness parameters. We validate our method on both simulated and real data, in both cases showing strong agreement with ground-truth measurements. Our technique provides a proof-of-concept for at-home health monitoring of medically-informative tissue properties, and it is further applicable to fields such as human-computer interaction.
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