Igeood: An Information Geometry Approach to Out-of-Distribution Detection
Eduardo Dadalto Camara Gomes, Florence Alberge, Pierre Duhamel, Pablo Piantanida
Abstract
Reliable out-of-distribution (OOD) detection is fundamental to implementing safer modern machine learning (ML) systems. In this paper, we introduce Igeood, an effective method for detecting OOD samples. Igeood applies to any pre-trained neural network, works under various degrees of access to the ML model, does not require OOD samples or assumptions on the OOD data but can also benefit (if available) from OOD samples. By building on the geodesic (Fisher-Rao) distance between the underlying data distributions, our discriminator can combine confidence scores from the logits outputs and the learned features of a deep neural network. Empirically, we show that Igeood outperforms competing state-of-the-art methods on a variety of network architectures and datasets.
BibTeX
@inproceedings{
gomes2022igeood,
title={Igeood: An Information Geometry Approach to Out-of-Distribution Detection},
author={Eduardo Dadalto Camara Gomes and Florence Alberge and Pierre Duhamel and Pablo Piantanida},
booktitle={International Conference on Learning Representations},
year={2022},
url={https://openreview.net/forum?id=mfwdY3U_9ea}
}