Papers › Continuous Generative Neural Networks: A Wavelet-Based Architecture in Function Spaces

Continuous Generative Neural Networks: A Wavelet-Based Architecture in Function Spaces

29 May 2022arXiv:2205.14627archive 2025-07-28

Giovanni S. Alberti, Matteo Santacesaria, Silvia Sciutto

In this work, we present and study Continuous Generative Neural Networks (CGNNs), namely, generative models in the continuous setting: the output of a CGNN belongs to an infinite-dimensional function space. The architecture is inspired by DCGAN, with one fully connected layer, several convolutional layers and nonlinear activation functions. In the continuous L² setting, the dimensions of the spaces of each layer are replaced by the scales of a multiresolution analysis of a compactly supported wavelet. We present conditions on the convolutional filters and on the nonlinearity that guarantee that a CGNN is injective. This theory finds applications to inverse problems, and allows for deriving Lipschitz stability estimates for (possibly nonlinear) infinite-dimensional inverse problems with unknowns belonging to the manifold generated by a CGNN. Several numerical simulations, including signal deblurring, illustrate and validate this approach.

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DeblurringImage Deblurring

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Batch NormalizationCGNNConvolutionDCGANMPNNReLU

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