Igeood: An Information Geometry Approach to Out-of-Distribution Detection

• URL: http://arxiv.org/abs/2203.07798v1
• Date: Tue, 15 Mar 2022 11:26:35 GMT
• Title: Igeood: An Information Geometry Approach to Out-of-Distribution Detection
• Authors: Eduardo Dadalto Camara Gomes, Florence Alberge, Pierre Duhamel and Pablo Piantanida
• Abstract summary: We introduce Igeood, an effective method for detecting out-of-distribution (OOD) samples. Igeood applies to any pre-trained neural network, works under various degrees of access to the machine learning model. We show that Igeood outperforms competing state-of-the-art methods on a variety of network architectures and datasets.
• Score: 35.04325145919005
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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.

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