Learning to Select Base Classes for Few-Shot Classification

Linjun Zhou, Peng Cui, Xu Jia, Shiqiang Yang, Qi Tian; Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR), 2020, pp. 4624-4633

Abstract


Few-shot learning has attracted intensive research attention in recent years. Many methods have been proposed to generalize a model learned from provided base classes to novel classes, but no previous work studies how to select base classes, or even whether different base classes will result in different generalization performance of the learned model. In this paper, we utilize a simple yet effective measure, the Similarity Ratio, as an indicator for the generalization performance of a few-shot model. We then formulate the base class selection problem as a submodular optimization problem over Similarity Ratio. We further provide theoretical analysis on the optimization lower bound of different optimization methods, which could be used to identify the most appropriate algorithm for different experimental settings. The extensive experiments on ImageNet, Caltech256 and CUB-200-2011 demonstrate that our proposed method is effective in selecting a better base dataset.

Related Material


[pdf] [supp] [arXiv]
[bibtex]
@InProceedings{Zhou_2020_CVPR,
author = {Zhou, Linjun and Cui, Peng and Jia, Xu and Yang, Shiqiang and Tian, Qi},
title = {Learning to Select Base Classes for Few-Shot Classification},
booktitle = {Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR)},
month = {June},
year = {2020}
}