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As a special type of object detection, pedestrian detection in generic scenes has made a significant progress trained with large amounts of labeled training data manually. While the models trained with generic dataset work bad when they are…

Computer Vision and Pattern Recognition · Computer Science 2017-12-27 Wenwen Zhang , Kunfeng Wang , Hua Qu , Jihong Zhao , Fei-Yue Wang

Existing research on sensor data anomaly detection for industrial sensor networks still has several inherent limitations. First, most detection models usually consider centralized detection. Thus, all sensor data have to be uploaded to the…

Cryptography and Security · Computer Science 2025-09-19 Tao Yang , Xuefeng Jiang , Wei Li , Peiyu Liu , Jinming Wang , Weijie Hao , Qiang Yang

Anomalies are samples that significantly deviate from the rest of the data and their detection plays a major role in building machine learning models that can be reliably used in applications such as data-driven design and novelty…

Machine Learning · Statistics 2023-06-19 Amin Yousefpour , Mehdi Shishehbor , Zahra Zanjani Foumani , Ramin Bostanabad

Among prerequisites for a synthetic agent to interact with dynamic scenes, the ability to identify independently moving objects is specifically important. From an application perspective, nevertheless, standard cameras may deteriorate…

Computer Vision and Pattern Recognition · Computer Science 2021-11-08 Xiuyuan Lu , Yi Zhou , Shaojie Shen

Autonomous agents need large repertoires of skills to act reasonably on new tasks that they have not seen before. However, acquiring these skills using only a stream of high-dimensional, unstructured, and unlabeled observations is a tricky…

Machine Learning · Computer Science 2021-02-09 Andrii Zadaianchuk , Maximilian Seitzer , Georg Martius

The ability to predict the future trajectories of traffic participants is crucial for the safe and efficient operation of autonomous vehicles. In this paper, a diffusion-based generative model for multi-agent trajectory prediction is…

Computer Vision and Pattern Recognition · Computer Science 2024-03-19 Theodor Westny , Björn Olofsson , Erik Frisk

Anomaly detection aims to identify observations that deviate from expected behavior. Because anomalous events are inherently sparse, most frameworks are trained exclusively on normal data to learn a single reference model of normality. This…

In medical imaging, obtaining large amounts of labeled data is often a hurdle, because annotations and pathologies are scarce. Anomaly detection is a method that is capable of detecting unseen abnormal data while only being trained on…

Computer Vision and Pattern Recognition · Computer Science 2022-06-09 Djennifer K. Madzia-Madzou , Hugo J. Kuijf

In this paper, we propose a method for real-time anomaly detection and localization in crowded scenes. Each video is defined as a set of non-overlapping cubic patches, and is described using two local and global descriptors. These…

Computer Vision and Pattern Recognition · Computer Science 2015-11-24 Mohammad Sabokrou , Mahmood Fathy , Mojtaba Hosseini , Reinhard Klette

We propose a general self-supervised learning approach for spatial perception tasks, such as estimating the pose of an object relative to the robot, from onboard sensor readings. The model is learned from training episodes, by relying on: a…

Robotics · Computer Science 2021-07-20 Mirko Nava , Antonio Paolillo , Jérôme Guzzi , Luca Maria Gambardella , Alessandro Giusti

Due to the issue that existing wireless sensor network (WSN)-based anomaly detection methods only consider and analyze temporal features, in this paper, a self-supervised learning-based anomaly node detection method based on an autoencoder…

Machine Learning · Computer Science 2022-12-29 Miao Ye , Qinghao Zhang , Xingsi Xue , Yong Wang , Qiuxiang Jiang , Hongbing Qiu

Unsupervised anomaly detection from high dimensional data like mobility networks is a challenging task. Study of different approaches of feature engineering from such high dimensional data have been a focus of research in this field. This…

Machine Learning · Computer Science 2019-12-09 Urwa Muaz , Stanislav Sobolevsky

Given the temporal GPS coordinates from a large set of human agents, how can we model their mobility behavior toward effective anomaly (e.g. bad-actor or malicious behavior) detection without any labeled data? Human mobility and trajectory…

Artificial Intelligence · Computer Science 2025-05-07 Haomin Wen , Shurui Cao , Zeeshan Rasheed , Khurram Hassan Shafique , Leman Akoglu

Detecting anomalous activity in human mobility data has a number of applications including road hazard sensing, telematic based insurance, and fraud detection in taxi services and ride sharing. In this paper we address two challenges that…

Machine Learning · Computer Science 2018-09-11 Kathryn Gray , Daniel Smolyak , Sarkhan Badirli , George Mohler

A contextual anomaly detection method is proposed and applied to the physical motions of a robot swarm executing a coverage task. Using simulations of a swarm's normal behavior, a normalizing flow is trained to predict the likelihood of a…

Robotics · Computer Science 2025-11-25 Ingeborg Wenger , Peter Eberhard , Henrik Ebel

Embodied scene understanding serves as the cornerstone for autonomous agents to perceive, interpret, and respond to open driving scenarios. Such understanding is typically founded upon Vision-Language Models (VLMs). Nevertheless, existing…

Computer Vision and Pattern Recognition · Computer Science 2024-03-08 Yunsong Zhou , Linyan Huang , Qingwen Bu , Jia Zeng , Tianyu Li , Hang Qiu , Hongzi Zhu , Minyi Guo , Yu Qiao , Hongyang Li

Although unsupervised generative modeling of an image dataset using a Variational AutoEncoder (VAE) has been used to detect anomalous images, or anomalous regions in images, recent works have shown that this method often identifies images…

Computer Vision and Pattern Recognition · Computer Science 2020-08-13 David Dehaene , Pierre Eline

This paper proposes an anomaly detection method based on federated learning to address key challenges in multi-tenant cloud environments, including data privacy leakage, heterogeneous resource behavior, and the limitations of centralized…

Machine Learning · Computer Science 2025-08-15 Yuxi Wang , Heyao Liu , Nyutian Long , Guanzi Yao

Neural network-based anomaly detection remains challenging in clinical applications with little or no supervised information and subtle anomalies such as hardly visible brain lesions. Among unsupervised methods, patch-based auto-encoders…

Image and Video Processing · Electrical Eng. & Systems 2023-02-28 Nicolas Pinon , Geoffroy Oudoumanessah , Robin Trombetta , Michel Dojat , Florence Forbes , Carole Lartizien

Most classification algorithms used in high energy physics fall under the category of supervised machine learning. Such methods require a training set containing both signal and background events and are prone to classification errors…

Data Analysis, Statistics and Probability · Physics 2015-06-03 Mikael Kuusela , Tommi Vatanen , Eric Malmi , Tapani Raiko , Timo Aaltonen , Yoshikazu Nagai