- Garay-Maestre, Unai; Gallego, Antonio-Javier; Calvo-Zaragoza, Jorge
"Data Augmentation via Variational Auto-Encoders"
Progress in Pattern Recognition, Image Analysis, Computer Vision, and Applications, ISBN: 978-3-030-13469-3, pp. 29--37
Data augmentation is a widely considered technique to improve the performance of Convolutional Neural Networks during training. This step consists in synthetically generate new labeled data by perturbing the samples of the training set, which is expected to provide more robustness to the learning process. The problem is that the augmentation procedure has to be adjusted manually because the perturbations considered must make sense for the task at issue. In this paper we propose the use of Variational Auto-Encoders (VAEs) to generate new synthetic samples, instead of resorting to heuristic strategies. VAEs are powerful generative models that learn a parametric latent space of the input domain from which new samples can be generated. In our experiments over the well-known MNIST dataset, the data augmentation by VAEs improves the base results, yet to a lesser extent of that obtained by a well-adjusted conventional data augmentation. However, the combination of both conventional and VAE-guided data augmentations outperforms all the results, thereby demonstrating the goodness of our proposal.
author = "Garay-Maestre, Unai; Gallego, Antonio-Javier; Calvo-Zaragoza, Jorge",
title = "Data Augmentation via Variational Auto-Encoders",
booktitle = "Progress in Pattern Recognition, Image Analysis, Computer Vision, and Applications",
isbn = "978-3-030-13469-3",
pages = "29--37",
year = "2019"
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