Unlike the conventional Knowledge Distillation (KD), Self-KD allows a network to learn knowledge from itself without any guidance from extra networks. This paper proposes to perform Self-KD from image Mixture (MixSKD), which integrates these two techniques into a unified framework. MixSKD mutually distills feature maps and probability distributions between the random pair of original images and their mixup images in a meaningful way. Therefore, it guides the network to learn cross-image knowledge by modelling supervisory signals from mixup images. Moreover, we construct a self-teacher network by aggregating multi-stage feature maps for providing soft labels to supervise the backbone classifier, further improving the efficacy of self-boosting. Experiments on image classification and transfer learning to object detection and semantic segmentation demonstrate that MixSKD outperforms other state-of-the-art Self-KD and data augmentation methods. The code is available at https://github.com/winycg/Self-KD-Lib.
@article{arxiv.2208.05768,
title = {MixSKD: Self-Knowledge Distillation from Mixup for Image Recognition},
author = {Chuanguang Yang and Zhulin An and Helong Zhou and Linhang Cai and Xiang Zhi and Jiwen Wu and Yongjun Xu and Qian Zhang},
journal= {arXiv preprint arXiv:2208.05768},
year = {2022}
}