DMT: Dynamic Mutual Training for Semi-Supervised Learning

• URL: http://arxiv.org/abs/2004.08514v4
• Date: Wed, 11 May 2022 10:23:22 GMT
• Title: DMT: Dynamic Mutual Training for Semi-Supervised Learning
• Authors: Zhengyang Feng, Qianyu Zhou, Qiqi Gu, Xin Tan, Guangliang Cheng, Xuequan Lu, Jianping Shi, Lizhuang Ma
• Abstract summary: Self-training methods usually rely on single model prediction confidence to filter low-confidence pseudo labels. We propose mutual training between two different models by a dynamically re-weighted loss function, called Dynamic Mutual Training. Our experiments show that DMT achieves state-of-the-art performance in both image classification and semantic segmentation.
• Score: 69.17919491907296
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Recent semi-supervised learning methods use pseudo supervision as core idea, especially self-training methods that generate pseudo labels. However, pseudo labels are unreliable. Self-training methods usually rely on single model prediction confidence to filter low-confidence pseudo labels, thus remaining high-confidence errors and wasting many low-confidence correct labels. In this paper, we point out it is difficult for a model to counter its own errors. Instead, leveraging inter-model disagreement between different models is a key to locate pseudo label errors. With this new viewpoint, we propose mutual training between two different models by a dynamically re-weighted loss function, called Dynamic Mutual Training (DMT). We quantify inter-model disagreement by comparing predictions from two different models to dynamically re-weight loss in training, where a larger disagreement indicates a possible error and corresponds to a lower loss value. Extensive experiments show that DMT achieves state-of-the-art performance in both image classification and semantic segmentation. Our codes are released at https://github.com/voldemortX/DST-CBC .

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