Semi-supervised Anomaly Detection

28 papers with code • 1 benchmarks • 2 datasets

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Libraries

Use these libraries to find Semi-supervised Anomaly Detection models and implementations

Most implemented papers

Generative Neural Networks for Anomaly Detection in Crowded Scenes

tianwangbuaa/VAE-for-abnormal-event-detection 29 Oct 2018

Security surveillance is critical to social harmony and people's peaceful life.

Semi-supervised Anomaly Detection using AutoEncoders

msminhas93/anomaly-detection-using-autoencoders Journal of Computational Vision and Imaging Systems 2020

But for defect detection lack of availability of a large number of anomalous instances and labelled data is a problem.

Semi-supervised Anomaly Detection on Attributed Graphs

tuananh0305/GCN_ANOMALY_DETECTION 27 Feb 2020

To learn node embeddings specialized for anomaly detection, in which there is a class imbalance due to the rarity of anomalies, the parameters of a GCN are trained to minimize the volume of a hypersphere that encloses the node embeddings of normal instances while embedding anomalous ones outside the hypersphere.

$\text{A}^3$: Activation Anomaly Analysis

Fraunhofer-AISEC/A3 3 Mar 2020

Based on the activation values in the target network, the alarm network decides if the given sample is normal.

A Characteristic Function for Shapley-Value-Based Attribution of Anomaly Scores

thetak11/pca_shapley 9 Apr 2020

In anomaly detection, the degree of irregularity is often summarized as a real-valued anomaly score.

Anomaly Detection by Recombining Gated Unsupervised Experts

Fraunhofer-AISEC/ARGUE 31 Aug 2020

Inspired by mixture-of-experts models and the analysis of the hidden activations of neural networks, we introduce a novel data-driven anomaly detection method called ARGUE.

Change-point detection in wind turbine SCADA data for robust condition monitoring with normal behaviour models

sltzgs/KernelCPD_WindSCADA Wind Energy Science 2020

For an automated change-point-free sequence selection, the most severe 60 % of all change points (CPs) could be automatically removed with a precision of more than 0. 96 and therefore without any significant loss of training data.

Understanding Bias in Anomaly Detection: A Semi-Supervised View with PAC Guarantees

ZIYU-DEEP/Understanding-Bias-in-Deep-Anomaly-Detection-PyTorch 1 Jan 2021

Given two different anomaly score functions, we formally define their difference in performance as the relative scoring bias of the anomaly detectors.

Iterative weak/self-supervised classification framework for abnormal events detection

DegardinBruno/human_self_learning_anomaly 3 Jan 2021

The detection of abnormal events in surveillance footage remains a challenge and has been the scope of various research works.

Self-Taught Semi-Supervised Anomaly Detection on Upper Limb X-rays

antoine-spahr/SELF-TAUGHT-SEMI-SUPERVISED-ANOMALY-DETECTION 19 Feb 2021

Detecting anomalies in musculoskeletal radiographs is of paramount importance for large-scale screening in the radiology workflow.