Affinity and Diversity: Quantifying Mechanisms of Data Augmentation

2020/02/20 by Raphael Gontijo-Lopes, Gontijo-Lopes, Raphael, Sylvia Smullin +5 · 11 citations
Computer Science · #Domain Adaptation and Few-Shot Learning #Stochastic Gradient Optimization Techniques #Adversarial Robustness in Machine Learning

paper · pdf · doi:10.48550/arxiv.2002.08973

Abstract

Though data augmentation has become a standard component of deep neural network training, the underlying mechanism behind the effectiveness of these techniques remains poorly understood. In practice, augmentation policies are often chosen using heuristics of either distribution shift or augmentation diversity. Inspired by these, we seek to quantify how data augmentation improves model generalization. To this end, we introduce interpretable and easy-to-compute measures: Affinity and Diversity. We find that augmentation performance is predicted not by either of these alone but by jointly optimizing the two.

Citations

• Auto-Encoding Variational Bayes
• ImageNet classification with deep convolutional neural networks

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