Representing shapes as level sets of neural networks has been recently proved to be useful for different shape analysis and reconstruction tasks So far, such representations were computed using either: (i) pre-computed implicit shape representations; or (ii) loss functions explicitly defined over the neural level sets. In this paper we offer a new paradigm for computing high fidelity implicit neural representations directly from raw data (i.e., point clouds, with or without normal information). We observe that a rather simple loss function, encouraging the neural network to vanish on the input point cloud and to have a unit norm gradient, possesses an implicit geometric regularization property that favors smooth and natural zero level set surfaces, avoiding bad zero-loss solutions. We provide a theoretical analysis of this property for the linear case, and show that, in practice, our method leads to state of the art implicit neural representations with higher level-of-details and fidelity compared to previous methods.

本文提出了一种从原始数据（即点云）中直接计算高保真度隐式神经表示的新范式，它鼓励神经网络在输入点云上消失并具有单位范数梯度的简单损失函数具有几何正则化特性，利用神经网络表示任务的表面形状的零水平集，避免不良零损失解，实验表明该方法与之前的方法相比具有更高的细节和保真度。

学习形状的隐式几何规则化