It is now possible to reconstruct dynamic human motion and shape from a
sparse set of cameras using Neural Radiance Fields (NeRF) driven by an
underlying skeleton. However, a challenge remains to model the deformation of
cloth and skin in relation to skeleton pose. Unlike existing avatar models that
are learned implicitly or rely on a proxy surface, our approach is motivated by
the observation that different poses necessitate unique frequency assignments.
Neglecting this distinction yields noisy artifacts in smooth areas or blurs
fine-grained texture and shape details in sharp regions. We develop a
two-branch neural network that is adaptive and explicit in the frequency
domain. The first branch is a graph neural network that models correlations
among body parts locally, taking skeleton pose as input. The second branch
combines these correlation features to a set of global frequencies and then
modulates the feature encoding. Our experiments demonstrate that our network
outperforms state-of-the-art methods in terms of preserving details and
generalization capabilities.

通过神经放射场（NeRF）驱动底层骨骼，现在可以从一组稀疏的摄像机中重构动态人体动作和形状。我们开发了一个自适应和显式的频域两支神经网络来建模与骨骼姿态相关的衣物和皮肤的变形。通过模拟不同姿势所需的唯一频率分配，我们的网络在保留细节和泛化能力方面优于现有的方法。