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Meta Variance Transfer: Learning to Augment from the Others

ICML 2020 · Label-efficient and robust learning › Zero-/few-shot and meta-learning · approach: Fine-tuning strategies for few-shot

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
add meta variance transfer (MVT) to Matching networkMatching network (Conv4+) · miniImageNet 5-way 5-shotaccuracy: +2.79 (64.88 to 67.67)Helped
add meta variance transfer (MVT) to Matching networkMatching network (Conv4+) · CUB 5-way 5-shotaccuracy: +3.35 (76.98 to 80.33)Helped
add meta variance transfer (MVT) to Matching networkMatching network (Conv4+) · miniImageNet 5-way 10-shotaccuracy: +2.98 (68.85 to 71.83)Helped
add meta variance transfer (MVT) to ResNet-10 backboneResNet-10 Matching network · CUB 5-way 5-shotaccuracy: +1.34 (84.01 to 85.35)Helped
add meta variance transfer (MVT) to Matching network with Conv4 backboneMatching network (Conv4) · miniImageNet 5-way 5-shotaccuracy: +0.61 (64.63 to 65.24)Helped
add meta variance transfer (MVT) to Matching networkMatching network (Conv4+) on Omniglot and mini-VGG · mini-VGG 5-way 5-shotaccuracy: +1.18 (85.95 to 87.13)Helped
naive variance transfer by adding one class's variations to another class mean without learning (ablation)Matching network baseline · miniImageNet 5-way 5-shotaccuracy: -32.13 (64.88 to 32.76)Hurt
add manifold regularization loss alone (ablation)Matching network baseline · miniImageNet 5-way 5-shotaccuracy: -0.51 (64.88 to 64.37)No clear effect
add manifold regularization to meta variance transfer (ablation)Meta variance transfer · miniImageNet 5-way 5-shotaccuracy: +0.99 (66.68 to 67.67)Helped
add manifold regularization to meta variance transfer (ablation)Meta variance transfer · CUB 5-way 5-shotaccuracy: +0.41 (79.92 to 80.33)Helped
add MVT on top of conventional augmentations (random crop, flip, color jitter) (ablation)ResNet-10+ Matching network · CUB 5-shot / miniVGG / miniCASIA 5-shotaccuracy: CUB +1.34; miniVGG +0.33; miniCASIA +1.65 (with aug)Helped
add MVT to Matching network across 10-way and 20-way 5-shotMatching network (Conv4+) · miniImageNet 10-way / 20-way 5-shotaccuracy: +2.80 (10-way); +2.72 (20-way)Helped

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