Pb4U-GNet: Resolution-Adaptive Garment Simulation via Propagation-before-Update Graph Network
This addresses a fundamental challenge in computer vision and graphics for applications like virtual try-on and digital human modeling, though it is incremental as it builds on existing GNN approaches.
The paper tackled the problem of poor cross-resolution generalization in neural garment simulation by introducing Pb4U-GNet, a resolution-adaptive graph network that decouples message propagation from feature updates, resulting in strong generalizability across diverse mesh resolutions even when trained only on low-resolution meshes.
Garment simulation is fundamental to various applications in computer vision and graphics, from virtual try-on to digital human modelling. However, conventional physics-based methods remain computationally expensive, hindering their application in time-sensitive scenarios. While graph neural networks (GNNs) offer promising acceleration, existing approaches exhibit poor cross-resolution generalisation, demonstrating significant performance degradation on higher-resolution meshes beyond the training distribution. This stems from two key factors: (1) existing GNNs employ fixed message-passing depth that fails to adapt information aggregation to mesh density variation, and (2) vertex-wise displacement magnitudes are inherently resolution-dependent in garment simulation. To address these issues, we introduce Propagation-before-Update Graph Network (Pb4U-GNet), a resolution-adaptive framework that decouples message propagation from feature updates. Pb4U-GNet incorporates two key mechanisms: (1) dynamic propagation depth control, adjusting message-passing iterations based on mesh resolution, and (2) geometry-aware update scaling, which scales predictions according to local mesh characteristics. Extensive experiments show that even trained solely on low-resolution meshes, Pb4U-GNet exhibits strong generalisability across diverse mesh resolutions, addressing a fundamental challenge in neural garment simulation.