Out of Distribution Data Detection Using Dropout Bayesian Neural Networks

• URL: http://arxiv.org/abs/2202.08985v1
• Date: Fri, 18 Feb 2022 02:23:43 GMT
• Title: Out of Distribution Data Detection Using Dropout Bayesian Neural Networks
• Authors: Andre T. Nguyen, Fred Lu, Gary Lopez Munoz, Edward Raff, Charles Nicholas, James Holt
• Abstract summary: We first show how previous attempts to leverage the randomized embeddings induced by the intermediate layers of a dropout BNN can fail due to the distance metric used. We introduce an alternative approach to measuring embedding uncertainty, justify its use theoretically, and demonstrate how incorporating embedding uncertainty improves OOD data identification across three tasks: image classification, language classification, and malware detection.
• Score: 29.84998820573774
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We explore the utility of information contained within a dropout based Bayesian neural network (BNN) for the task of detecting out of distribution (OOD) data. We first show how previous attempts to leverage the randomized embeddings induced by the intermediate layers of a dropout BNN can fail due to the distance metric used. We introduce an alternative approach to measuring embedding uncertainty, justify its use theoretically, and demonstrate how incorporating embedding uncertainty improves OOD data identification across three tasks: image classification, language classification, and malware detection.

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