Combine and Conquer: A Meta-Analysis on Data Shift and Out-of-Distribution Detection
Résumé
This paper introduces a universal approach to seamlessly combine out-of-distribution (OOD)
detection scores. These scores encompass a wide range of techniques that leverage the self-
confidence of deep learning models and the anomalous behavior of features in the latent
space. Not surprisingly, combining such a varied population using simple statistics proves
inadequate. To overcome this challenge, we propose a quantile normalization to map these
scores into p-values, effectively framing the problem into a multi-variate hypothesis test.
Then, we combine these tests using established meta-analysis tools, resulting in a more effec-
tive detector with consolidated decision boundaries. Furthermore, we create a probabilistic
interpretable criterion by mapping the final statistics into a distribution with known param-
eters. Through empirical investigation, we explore different types of shifts, each exerting
varying degrees of impact on data. Our results demonstrate that our approach significantly
improves overall robustness and performance across diverse OOD detection scenarios. No-
tably, our framework is easily extensible for future developments in detection scores and
stands as the first to combine decision boundaries in this context. The code and artifacts
associated with this work are publicly available.
Domaines
Intelligence artificielle [cs.AI]Origine | Fichiers produits par l'(les) auteur(s) |
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