Unsupervised Data Augmentation for Consistency Training

Unsupervised Data Augmentation for Consistency Training Qizhe Xie1,2 , Zihang Dai1,2 , Eduard Hovy2 , Minh-Thang Luong1 , Quoc V. Le1. 1. Google Research, Brain Team, 2 Carnegie Mellon University {qizhex, dzihang, {thangluong, Abstract Semi-supervised learning lately has shown much promise in improving deep learn- ing models when labeled data is scarce. Common among recent approaches is the use of Consistency Training on a large amount of unlabeled data to constrain model predictions to be invariant to input noise. In this work, we present a new perspective on how to effectively noise unlabeled examples and argue that the quality of noising, specifically those produced by advanced data Augmentation methods, plays a crucial role in semi-supervised learning.}}

various supervised settings to inject noise and optimize the same consistency training objective on unlabeled examples. When jointly trained with labeled examples, we utilize a weighting factor to balance the supervised cross entropy and the unsupervised consistency training loss, which is illustrated in Figure 1.

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