Weakly-supervised anomaly detection for multimodal data distributions

• URL: http://arxiv.org/abs/2406.09147v1
• Date: Thu, 13 Jun 2024 14:14:27 GMT
• Title: Weakly-supervised anomaly detection for multimodal data distributions
• Authors: Xu Tan, Junqi Chen, Sylwan Rahardja, Jiawei Yang, Susanto Rahardja,
• Abstract summary: We propose the Weakly-supervised Variational-mixture-model-based Anomaly Detector (WVAD) WVAD excels in multimodal datasets. Experimental results on three real-world datasets demonstrate WVAD's superiority.
• Score: 25.60381244912307
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Weakly-supervised anomaly detection can outperform existing unsupervised methods with the assistance of a very small number of labeled anomalies, which attracts increasing attention from researchers. However, existing weakly-supervised anomaly detection methods are limited as these methods do not factor in the multimodel nature of the real-world data distribution. To mitigate this, we propose the Weakly-supervised Variational-mixture-model-based Anomaly Detector (WVAD). WVAD excels in multimodal datasets. It consists of two components: a deep variational mixture model, and an anomaly score estimator. The deep variational mixture model captures various features of the data from different clusters, then these features are delivered to the anomaly score estimator to assess the anomaly levels. Experimental results on three real-world datasets demonstrate WVAD's superiority.

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