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Training Lightweight Graph Convolutional Networks with Phase-field Models

2022-12-19 12:49:03
Hichem Sahbi
arXiv_CV
         
Abstract

In this paper, we design lightweight graph convolutional networks (GCNs) using a particular class of regularizers, dubbed as phase-field models (PFMs). PFMs exhibit a bi-phase behavior using a particular ultra-local term that allows training both the topology and the weight parameters of GCNs as a part of a single "end-to-end" optimization problem. Our proposed solution also relies on a reparametrization that pushes the mask of the topology towards binary values leading to effective topology selection and high generalization while implementing any targeted pruning rate. Both masks and weights share the same set of latent variables and this further enhances the generalization power of the resulting lightweight GCNs. Extensive experiments conducted on the challenging task of skeleton-based recognition show the outperformance of PFMs against other staple regularizers as well as related lightweight design methods.

Abstract (translated)

URL

https://arxiv.org/abs/2212.09415

PDF

https://arxiv.org/pdf/2212.09415.pdf

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