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CutPaste: Self-Supervised Learning for Anomaly Detection and Localization

CVPR 2021 · Label-efficient and robust learning › OOD and anomaly detection · approach: Unified multi-class anomaly detection · 1,006 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Use CutPaste augmentation rather than Cutout (ablation)Self-supervised defect detector · MVTec ADimage-level AUC: 71.3 -> 90.9Helped
Add CutPaste-Scar as a separate prediction class alongside CutPaste (ablation)CutPaste defect detector · MVTec ADimage-level AUC: 90.9 -> 95.2Helped
Model CutPaste and CutPaste-Scar as separate classes rather than one union class (ablation)CutPaste defect detector · MVTec ADimage-level AUC: 94.3 -> 95.2Helped
Replace standard Cutout fill with mean pixel values (ablation)Self-supervised defect detector · MVTec ADimage-level AUC: 71.3 -> 73.9Helped
Replace standard Cutout fill with random colors (ablation)Self-supervised defect detector · MVTec ADimage-level AUC: 71.3 -> 76.1Helped
Use Confetti noise instead of Cutout (ablation)Self-supervised defect detector · MVTec ADimage-level AUC: 71.3 -> 77.8Helped
Fine-tune ImageNet-pretrained EfficientNet-B4 using CutPaste (3-way) (ablation)EfficientNet-B4 anomaly detector · MVTec ADimage-level AUC, pool feature: 94.5 -> 96.6Helped
Fine-tune ImageNet-pretrained EfficientNet-B4 using CutPaste (3-way) (ablation)EfficientNet-B4 anomaly detector · MVTec ADimage-level AUC, level-7 feature: 96.8 -> 97.1Helped
Use patch-level representations for localization instead of image-level GradCAM (ablation)CutPaste localization model · MVTec ADpixel-level localization AUC: 88.3 -> 96.0Helped
Use CutPaste (3-way) rather than Cutout for synthetic anomalies (ablation)Anomaly detector · Synthetic anomaly detectionAUC: 81.5 -> 98.3Helped
Use CutPaste rather than Cutout (ablation)Semantic anomaly detector · CIFAR-10AUC: 60.2 -> 69.4Helped
Use rotation prediction rather than CutPasteSemantic anomaly detector · CIFAR-10AUC: 69.4 -> 91.3Helped

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