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SimpleShot: Revisiting Nearest-Neighbor Classification for Few-Shot Learning

Yan Wang Wei-Lun Chao Kilian Q. Weinberger Laurens van der Maaten

Abstract

Few-shot learners aim to recognize new object classes based on a small number of labeled training examples. To prevent overfitting, state-of-the-art few-shot learners use meta-learning on convolutional-network features and perform classification using a nearest-neighbor classifier. This paper studies the accuracy of nearest-neighbor baselines without meta-learning. Surprisingly, we find simple feature transformations suffice to obtain competitive few-shot learning accuracies. For example, we find that a nearest-neighbor classifier used in combination with mean-subtraction and L2-normalization outperforms prior results in three out of five settings on the miniImageNet dataset.


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SimpleShot: Revisiting Nearest-Neighbor Classification for Few-Shot Learning | Papers | HyperAI