Meta-Ensemble Parameter Learning

• URL: http://arxiv.org/abs/2210.01973v1
• Date: Wed, 5 Oct 2022 00:47:24 GMT
• Title: Meta-Ensemble Parameter Learning
• Authors: Zhengcong Fei, Shuman Tian, Junshi Huang, Xiaoming Wei, Xiaolin Wei
• Abstract summary: In this paper, we study if we can utilize the meta-learning strategy to directly predict the parameters of a single model with comparable performance of an ensemble. We introduce WeightFormer, a Transformer-based model that can predict student network weights layer by layer in a forward pass.
• Score: 35.6391802164328
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Ensemble of machine learning models yields improved performance as well as robustness. However, their memory requirements and inference costs can be prohibitively high. Knowledge distillation is an approach that allows a single model to efficiently capture the approximate performance of an ensemble while showing poor scalability as demand for re-training when introducing new teacher models. In this paper, we study if we can utilize the meta-learning strategy to directly predict the parameters of a single model with comparable performance of an ensemble. Hereto, we introduce WeightFormer, a Transformer-based model that can predict student network weights layer by layer in a forward pass, according to the teacher model parameters. The proprieties of WeightFormer are investigated on the CIFAR-10, CIFAR-100, and ImageNet datasets for model structures of VGGNet-11, ResNet-50, and ViT-B/32, where it demonstrates that our method can achieve approximate classification performance of an ensemble and outperforms both the single network and standard knowledge distillation. More encouragingly, we show that WeightFormer results can further exceeds average ensemble with minor fine-tuning. Importantly, our task along with the model and results can potentially lead to a new, more efficient, and scalable paradigm of ensemble networks parameter learning.

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