Temporal Reversal Regularization for Spiking Neural Networks: Hybrid Spatio-Temporal Invariance for Generalization

• URL: http://arxiv.org/abs/2408.09108v3
• Date: Mon, 10 Mar 2025 08:30:52 GMT
• Title: Temporal Reversal Regularization for Spiking Neural Networks: Hybrid Spatio-Temporal Invariance for Generalization
• Authors: Lin Zuo, Yongqi Ding, Wenwei Luo, Mengmeng Jing, Kunshan Yang,
• Abstract summary: Spiking neural networks (SNNs) have received widespread attention as an ultra-low power computing paradigm.<n>Recent studies have shown that SNNs suffer from severe overfitting, which limits their generalization performance.<n>We propose a simple yet effective Temporal Reversal Regularization to mitigate overfitting during training and facilitate generalization of SNNs.
• Score: 3.7748662901422807
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Spiking neural networks (SNNs) have received widespread attention as an ultra-low power computing paradigm. Recent studies have shown that SNNs suffer from severe overfitting, which limits their generalization performance. In this paper, we propose a simple yet effective Temporal Reversal Regularization (TRR) to mitigate overfitting during training and facilitate generalization of SNNs. We exploit the inherent temporal properties of SNNs to perform input/feature temporal reversal perturbations, prompting the SNN to produce original-reversed consistent outputs and learn perturbation-invariant representations. To further enhance generalization, we utilize the lightweight ``star operation" (Hadamard product) for feature hybridization of original and temporally reversed spike firing rates, which expands the implicit dimensionality and acts as a spatio-temporal regularizer. We show theoretically that our method is able to tighten the upper bound of the generalization error, and extensive experiments on static/neuromorphic recognition as well as 3D point cloud classification tasks demonstrate its effectiveness, versatility, and adversarial robustness. In particular, our regularization significantly improves the recognition accuracy of low-latency SNN for neuromorphic objects, contributing to the real-world deployment of neuromorphic computational software-hardware integration.

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