LocalNorm: Robust image classification through dynamically regularized normalization
While modern convolutional neural networks achieve outstanding accuracy on many image classification tasks, they are, compared to humans, much more sensitive to image degradation. Here, we describe a variant of Batch Normalization, LocalNorm, that regularizes the normalization layer in the spirit of Dropout while dynamically adapting to the local image intensity and contrast at test-time. We show that the resulting deep neural networks are much more resistant to noise-induced image degradation, improving accuracy by up to three times, while achieving the same or slightly better accuracy on non-degraded classical benchmarks. In computational terms, LocalNorm adds negligible training cost and little or no cost at inference time, and can be applied to already-trained networks in a straightforward manner.
|Lecture Notes in Computer Science|
|30th International Conference on Artificial Neural Networks, ICANN 2021|
Yin, B, Scholte, H.S, & Bohte, S.M. (2021). LocalNorm: Robust image classification through dynamically regularized normalization. In Proceedings of the International Conference of Artificial Neural Networks (pp. 240–252).