Papers › Out-of-Distribution Detection Without Class Labels
Out-of-Distribution Detection Without Class Labels
Niv Cohen, Ron Abutbul, Yedid Hoshen
Out-of-distribution detection seeks to identify novelties, samples that deviate from the norm. The task has been found to be quite challenging, particularly in the case where the normal data distribution consists of multiple semantic classes (e.g., multiple object categories). To overcome this challenge, current approaches require manual labeling of the normal images provided during training. In this work, we tackle multi-class novelty detection without class labels. Our simple but effective solution consists of two stages: we first discover "pseudo-class" labels using unsupervised clustering. Then using these pseudo-class labels, we are able to use standard supervised out-of-distribution detection methods. We verify the performance of our method by a favorable comparison to the state-of-the-art, and provide extensive analysis and ablations.
Code
No code repository is listed for this paper in the archive or in Syntology's graph.
Code Syntology ran Syntology
Not run by Syntology. Nothing on this page verifies that the listed code works.
Tasks
Results from the paper archive 2025-07-28
| Task | Dataset | Model | Metric | Value | Rank at snapshot | Leaderboard | Report |
|---|---|---|---|---|---|---|---|
| Anomaly Detection | Anomaly Detection on Anomaly Detection on Unlabeled ImageNet-30 vs Flowers-102 | PsudoLabels CLIP ViT | Network | ViT | #1 of 5 | Archive leaderboard | report |
| Anomaly Detection | Anomaly Detection on Anomaly Detection on Unlabeled ImageNet-30 vs Flowers-102 | PsudoLabels CLIP ViT | ROC-AUC | 98.3 | #1 of 5 | Archive leaderboard | report |
| Anomaly Detection | Anomaly Detection on Unlabeled CIFAR-10 vs LSUN (Fix) | PsudoLabels ViT | Network | ViT | #1 of 8 | Archive leaderboard | report |
| Anomaly Detection | Anomaly Detection on Unlabeled CIFAR-10 vs LSUN (Fix) | PsudoLabels ViT | ROC-AUC | 99.1 | #1 of 8 | Archive leaderboard | report |
| Anomaly Detection | Anomaly Detection on Unlabeled CIFAR-10 vs LSUN (Fix) | PsudoLabels ResNet-152 | Network | ResNet-152 | #3 of 8 | Archive leaderboard | report |
| Anomaly Detection | Anomaly Detection on Unlabeled CIFAR-10 vs LSUN (Fix) | PsudoLabels ResNet-152 | ROC-AUC | 95.7 | #3 of 8 | Archive leaderboard | report |
| Anomaly Detection | Anomaly Detection on Unlabeled CIFAR-10 vs LSUN (Fix) | PsudoLabels ResNet-18 | Network | ResNet-18 | #4 of 8 | Archive leaderboard | report |
| Anomaly Detection | Anomaly Detection on Unlabeled CIFAR-10 vs LSUN (Fix) | PsudoLabels ResNet-18 | ROC-AUC | 94.3 | #4 of 8 | Archive leaderboard | report |
| Anomaly Detection | Anomaly Detection on Unlabeled CIFAR-10 vs LSUN (Fix) | SCAN Features | Network | ResNet-18 | #7 of 8 | Archive leaderboard | report |
| Anomaly Detection | Anomaly Detection on Unlabeled CIFAR-10 vs LSUN (Fix) | SCAN Features | ROC-AUC | 90.2 | #7 of 8 | Archive leaderboard | report |
| Anomaly Detection | Anomaly Detection on Unlabeled ImageNet-30 vs CUB-200 | PsudoLabels CLIP ViT | Network | ViT | #1 of 5 | Archive leaderboard | report |
| Anomaly Detection | Anomaly Detection on Unlabeled ImageNet-30 vs CUB-200 | PsudoLabels CLIP ViT | ROC-AUC | 99.4 | #1 of 5 | Archive leaderboard | report |
| Anomaly Detection | Unlabeled CIFAR-10 vs CIFAR-100 | PsudoLabels ViT | AUROC | 96.7 | #1 of 13 | Archive leaderboard | report |
| Anomaly Detection | Unlabeled CIFAR-10 vs CIFAR-100 | PsudoLabels ViT | Network | ViT | #1 of 13 | Archive leaderboard | report |
| Anomaly Detection | Unlabeled CIFAR-10 vs CIFAR-100 | PsudoLabels ResNet-152 | AUROC | 93.3 | #2 of 13 | Archive leaderboard | report |
| Anomaly Detection | Unlabeled CIFAR-10 vs CIFAR-100 | PsudoLabels ResNet-152 | Network | ResNet-152 | #2 of 13 | Archive leaderboard | report |
| Anomaly Detection | Unlabeled CIFAR-10 vs CIFAR-100 | PsudoLabels ResNet-18 | AUROC | 90.8 | #3 of 13 | Archive leaderboard | report |
| Anomaly Detection | Unlabeled CIFAR-10 vs CIFAR-100 | PsudoLabels ResNet-18 | Network | ResNet-18 | #3 of 13 | Archive leaderboard | report |
| Anomaly Detection | Unlabeled CIFAR-10 vs CIFAR-100 | SCAN Features | AUROC | 90.2 | #4 of 13 | Archive leaderboard | report |
| Anomaly Detection | Unlabeled CIFAR-10 vs CIFAR-100 | SCAN Features | Network | ResNet-18 | #4 of 13 | Archive leaderboard | report |
Ranks are positions in the archive's leaderboards as they stood at the 2025-07-28 snapshot. Results published since then are not among these rows, so a rank here is not a current standing.
Report a problem or propose a change · a person checks every report against the paper or source before anything changes; decisions are listed on /corrections