3260 papers • 126 benchmarks • 313 datasets
Outlier Detection is a task of identifying a subset of a given data set which are considered anomalous in that they are unusual from other instances. It is one of the core data mining tasks and is central to many applications. In the security field, it can be used to identify potentially threatening users, in the manufacturing field it can be used to identify parts that are likely to fail. Source: Coverage-based Outlier Explanation
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This work proposes PatchCore, which uses a maximally representative memory bank of nominal patch-features, which offers competitive inference times while achieving state-of-the-art performance for both detection and localization.
This work proposes a Long Short Term Memory Networks based Encoder-Decoder scheme for Anomaly Detection (EncDec-AD) that learns to reconstruct 'normal' time-series behavior, and thereafter uses reconstruction error to detect anomalies.
The augmentation of fully convolutional networks with long short term memory recurrent neural network (LSTM RNN) sub-modules for time series classification with attention mechanism and refinement as a method to enhance the performance of trained models are proposed.
This work presents Deep SAD, an end-to-end deep methodology for general semi-supervised anomaly detection, and introduces an information-theoretic framework for deep anomaly detection based on the idea that the entropy of the latent distribution for normal data should be lower than the entropy the anomalous distribution, which can serve as a theoretical interpretation for the method.
The main theorem characterizes the permutation invariant objective functions and provides a family of functions to which any permutation invincible objective function must belong, which enables the design of a deep network architecture that can operate on sets and which can be deployed on a variety of scenarios including both unsupervised and supervised learning tasks.
The results on MNIST and Caltech-256 image datasets, along with the challenging UCSD Ped2 dataset for video anomaly detection illustrate that the proposed method learns the target class effectively and is superior to the baseline and state-of-the-art methods.
PyOD provides access to a wide range of outlier detection algorithms, including established outlier ensembles and more recent neural network-based approaches, under a single, well-documented API designed for use by both practitioners and researchers.
This work conducts the most comprehensive anomaly detection benchmark with 30 algorithms on 57 benchmark datasets, named ADBench, to identify meaningful insights into the role of supervision and anomaly types, and unlock future directions for researchers in algorithm selection and design.
This paper introduces a ranking model-based framework, called RAMODO, that unifies representation learning and outlier detection to learn low-dimensional representations that are tailored for a state-of-the-art outlier Detection approach - the random distance-based approach.
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