TokenMixup: Efficient Attention-guided Token-level Data Augmentation for TransformersDownload PDF

Published: 31 Oct 2022, 18:00, Last Modified: 11 Oct 2022, 09:46NeurIPS 2022 AcceptReaders: Everyone
Keywords: data augmentation, mixup, vision transformer
TL;DR: TokenMixup is a general token-level augmentation method, which provides an efficient augmentation means for vision transformer models.
Abstract: Mixup is a commonly adopted data augmentation technique for image classification. Recent advances in mixup methods primarily focus on mixing based on saliency. However, many saliency detectors require intense computation and are especially burdensome for parameter-heavy transformer models. To this end, we propose TokenMixup, an efficient attention-guided token-level data augmentation method that aims to maximize the saliency of a mixed set of tokens. TokenMixup provides ×15 faster saliency-aware data augmentation compared to gradient-based methods. Moreover, we introduce a variant of TokenMixup which mixes tokens within a single instance, thereby enabling multi-scale feature augmentation. Experiments show that our methods significantly improve the baseline models’ performance on CIFAR and ImageNet-1K, while being more efficient than previous methods. We also reach state-of-the-art performance on CIFAR-100 among from-scratch transformer models. Code is available at https://github.com/mlvlab/TokenMixup.
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