We present Manifold Diffusion Fields (MDF), an approach to learn generative
models of continuous functions defined over Riemannian manifolds. Leveraging
insights from spectral geometry analysis, we define an intrinsic coordinate
system on the manifold via the eigen-functions of the Laplace-Beltrami
Operator. MDF represents functions using an explicit parametrization formed by
a set of multiple input-output pairs. Our approach allows to sample continuous
functions on manifolds and is invariant with respect to rigid and isometric
transformations of the manifold. Empirical results on several datasets and
manifolds show that MDF can capture distributions of such functions with better
diversity and fidelity than previous approaches.

本文提出了一种名为 Manifold Diffusion Fields（MDF）的方法来学习定义在黎曼流形上的连续函数的生成模型，该方法利用了谱几何分析的见解，在流形上定义了一种内在坐标系统，MDF 使用由多个输入输出对形成的显式参数化来表示函数，该方法允许在流形上采样连续函数，并且对于流形的刚性和等距变换是不变的，实证结果表明，与之前的方法相比，MDF 可以更好地捕捉这些函数的分布，具有更好的多样性和保真度。