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Masked Images Are Counterfactual Samples for Robust Fine-Tuning

CVPR 2023 · Label-efficient and robust learning › OOD and anomaly detection · approach: Robust fine-tuning for OOD generalization · 16 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Fine-tune with object-masked counterfactual images refilled from one other imageCLIP ViT-B/32 · OOD avg. (five OOD datasets)average top-1 accuracy: 44.2 -> 53.1Helped
Fine-tune with object-masked counterfactual images refilled from one other imageCLIP ViT-B/16 · OOD avg. (five OOD datasets)average top-1 accuracy: 52.8 -> 63.3Helped
Use object-mask rather than random-mask or context-mask (ablation)Masked-image fine-tuning · OOD avg. (five OOD datasets)average top-1 accuracy: 51.2 -> 53.1; 52.6 -> 53.1Mixed
Refill masked regions from one other image instead of dropping them (ablation)Object-mask fine-tuning · OOD avg. (five OOD datasets)average top-1 accuracy: 51.9 -> 53.1Helped
Refill masked regions from multiple images instead of dropping them (ablation)Object-mask fine-tuning · OOD avg. (five OOD datasets)average top-1 accuracy: 51.9 -> 52.6Helped
Use single-fill rather than multi-fill (ablation)Object-mask fine-tuning · ImageNettop-1 accuracy: 77.9 -> 77.5Hurt
Use single-fill rather than multi-fill (ablation)Object-mask fine-tuning · OOD avg. (five OOD datasets)average top-1 accuracy: 52.6 -> 53.1Helped
Apply random-mask with no-fill instead of no masking (ablation)Masked-image fine-tuning · OOD avg. (five OOD datasets)average top-1 accuracy: 51.3 -> 51.2No clear effect
Apply context-mask with no-fill instead of no masking (ablation)Masked-image fine-tuning · OOD avg. (five OOD datasets)average top-1 accuracy: 51.3 -> 51.1No clear effect
Apply object-mask with no-fill instead of no masking (ablation)Masked-image fine-tuning · OOD avg. (five OOD datasets)average top-1 accuracy: 51.3 -> 51.9Helped
Use WiSE-FT weight averaging with the proposed fine-tuned model (ablation)Ours (single-fill) · ImageNet ID and OOD accuracytop-1 accuracyMixed
Distill from a WiSE-FT teacher in addition to counterfactual feature distillation (ablation)Ours · ImageNet ID and OOD accuracytop-1 accuracyHelped

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