NAM: Neural Adjoint Maps for refining shape correspondences

In this paper, we propose a novel approach to refine 3D shape correspon- dences by leveraging multi-layer perceptions within the framework of func- tional maps. Central to our contribution is the concept of Neural Adjoint Maps, a novel neural representation that generalizes the traditional solution of functional maps for estimating correspondence between manifolds. Fos- tering our neural representation, we propose an iterative algorithm explicitly designed to enhance the precision and robustness of shape correspondence across diverse modalities such as meshes and point clouds. By harnessing the expressive power of non-linear solutions, our method captures intricate geometric details and feature correspondences that conventional linear ap- proaches often overlook. Extensive evaluations on standard benchmarks and challenging datasets demonstrate that our approach achieves state-of- the-art accuracy for both isometric and non-isometric meshes and for point clouds where traditional methods frequently struggle. Moreover, we show the versatility of our method in tasks such as signal and neural field transfer, highlighting its broad applicability to domains including computer graphics, medical imaging, and other fields demanding precise transfer of information among 3D shapes. Our work sets a new standard for shape correspondence refinement, offering robust tools across various applications.