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Variational Autoencoder based Anomaly Detection using ...

SNU Data Mining Center 2015-2 Special Lecture on IE. Variational Autoencoder based Anomaly Detection using Reconstruction Probability Jinwon An Sungzoon Cho December 27, 2015. Abstract We propose an Anomaly Detection method using the reconstruction probability from the Variational Autoencoder . The reconstruction probability is a probabilistic measure that takes into account the variability of the distribution of variables. The reconstruction probability has a theoretical background making it a more principled and objective Anomaly score than the reconstruction error, which is used by Autoencoder and principal components based Anomaly Detection methods.

Among many anomaly detection methods, spectral anomaly detection techniques try to nd ... For clustering based anomaly detection, a clustering algorithm is applied to the data to identify dense regions or clusters that are present in the data. Next, the relationships of the data points to each cluster is evaluated to form an anomaly

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