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Anomaly detection is an essential problem in machine learning. Application areas include network security, health care, fraud detection, etc., involving high-dimensional datasets. A typical anomaly detection system always faces the…

Machine Learning · Computer Science 2021-12-30 Inderjeet Singh , Nandyala Hemachandra

A single unexpected object on the road can cause an accident or may lead to injuries. To prevent this, we need a reliable mechanism for finding anomalous objects on the road. This task, called anomaly segmentation, can be a stepping stone…

Computer Vision and Pattern Recognition · Computer Science 2023-08-07 Alexey Nekrasov , Alexander Hermans , Lars Kuhnert , Bastian Leibe

Medical imaging data suffers from the limited availability of annotation because annotating 3D medical data is a time-consuming and expensive task. Moreover, even if the annotation is available, supervised learning-based approaches suffer…

Image and Video Processing · Electrical Eng. & Systems 2020-11-12 Abinav Ravi Venkatakrishnan , Seong Tae Kim , Rami Eisawy , Franz Pfister , Nassir Navab

Different from the current node-level anomaly detection task, the goal of graph-level anomaly detection is to find abnormal graphs that significantly differ from others in a graph set. Due to the scarcity of research on the work of…

Machine Learning · Computer Science 2023-08-07 Fu Lin , Xuexiong Luo , Jia Wu , Jian Yang , Shan Xue , Zitong Wang , Haonan Gong

Supervised anomaly detection methods perform well in identifying known anomalies that are well represented in the training set. However, they often struggle to generalise beyond the training distribution due to decision boundaries that lack…

Machine Learning · Computer Science 2025-11-18 Zahra Zamanzadeh Darban , Qizhou Wang , Charu C. Aggarwal , Geoffrey I. Webb , Ehsan Abbasnejad , Mahsa Salehi

This paper proposes to go beyond the state-of-the-art deep convolutional neural network (CNN) by incorporating the information from object detection, focusing on dealing with fine-grained image classification. Unfortunately, CNN suffers…

Computer Vision and Pattern Recognition · Computer Science 2014-12-11 Xiaoyu Wang , Tianbao Yang , Guobin Chen , Yuanqing Lin

Category-level articulated object pose estimation focuses on the pose estimation of unknown articulated objects within known categories. Despite its significance, this task remains challenging due to the varying shapes and poses of objects,…

Computer Vision and Pattern Recognition · Computer Science 2025-12-05 Yuchen Che , Ryo Furukawa , Asako Kanezaki

To train a robust deep learning model, one usually needs a balanced set of categories in the training data. The data acquired in a medical domain, however, frequently contains an abundance of healthy patients, versus a small variety of…

Image and Video Processing · Electrical Eng. & Systems 2020-03-09 Jevgenij Gamper , Brandon Chan , Yee Wah Tsang , David Snead , Nasir Rajpoot

Objects, in the real world, rarely occur in isolation and exhibit typical arrangements governed by their independent utility, and their expected interaction with humans and other objects in the context. For example, a chair is expected near…

Computer Vision and Pattern Recognition · Computer Science 2024-11-21 Sharat Agarwal

Classical global convergence results for first-order methods rely on uniform smoothness and the \L{}ojasiewicz inequality. Motivated by properties of objective functions that arise in machine learning, we propose a non-uniform refinement of…

Machine Learning · Computer Science 2022-06-03 Jincheng Mei , Yue Gao , Bo Dai , Csaba Szepesvari , Dale Schuurmans

Anomaly activities such as robbery, explosion, accidents, etc. need immediate actions for preventing loss of human life and property in real world surveillance systems. Although the recent automation in surveillance systems are capable of…

Computer Vision and Pattern Recognition · Computer Science 2021-08-23 Snehashis Majhi , Srijan Das , Francois Bremond , Ratnakar Dash , Pankaj Kumar Sa

We study the problem of learning to assign a characteristic pose, i.e., scale and orientation, for an image region of interest. Despite its apparent simplicity, the problem is non-trivial; it is hard to obtain a large-scale set of image…

Computer Vision and Pattern Recognition · Computer Science 2022-06-16 Jongmin Lee , Yoonwoo Jeong , Minsu Cho

Deep models trained with noisy labels are prone to over-fitting and struggle in generalization. Most existing solutions are based on an ideal assumption that the label noise is class-conditional, i.e., instances of the same class share the…

Computer Vision and Pattern Recognition · Computer Science 2022-08-01 Ganlong Zhao , Guanbin Li , Yipeng Qin , Feng Liu , Yizhou Yu

Recently, a new class of non-convex optimization problems motivated by the statistical problem of learning an acyclic directed graphical model from data has attracted significant interest. While existing work uses standard first-order…

Machine Learning · Computer Science 2023-07-03 Chang Deng , Kevin Bello , Bryon Aragam , Pradeep Ravikumar

Within the context of autonomous driving, encountering unknown objects becomes inevitable during deployment in the open world. Therefore, it is crucial to equip standard semantic segmentation models with anomaly awareness. Many previous…

Computer Vision and Pattern Recognition · Computer Science 2023-08-22 Dan Zhang , Kaspar Sakmann , William Beluch , Robin Hutmacher , Yumeng Li

Deep learning models suffer from catastrophic forgetting of the classes in the older phases as they get trained on the classes introduced in the new phase in the class-incremental learning setting. In this work, we show that the effect of…

Computer Vision and Pattern Recognition · Computer Science 2021-12-24 Mohammed Asad Karim , Indu Joshi , Pratik Mazumder , Pravendra Singh

Anomaly segmentation plays a pivotal role in identifying atypical objects in images, crucial for hazard detection in autonomous driving systems. While existing methods demonstrate noteworthy results on synthetic data, they often fail to…

Computer Vision and Pattern Recognition · Computer Science 2023-10-17 Ji Zhang , Xiao Wu , Zhi-Qi Cheng , Qi He , Wei Li

Occlusions are a significant challenge to human pose estimation algorithms, often resulting in inaccurate and anatomically implausible poses. Although current occlusion-robust human pose estimation algorithms exhibit impressive performance…

Computer Vision and Pattern Recognition · Computer Science 2025-01-07 Arindam Dutta , Sarosij Bose , Saketh Bachu , Calvin-Khang Ta , Konstantinos Karydis , Amit K. Roy-Chowdhury

Human analysts that use anomaly detection systems in practice want to retain the use of simple and explainable global anomaly detectors. In this paper, we propose a novel human-in-the-loop learning algorithm called GLAD (GLocalized Anomaly…

Machine Learning · Computer Science 2020-07-17 Md Rakibul Islam , Shubhomoy Das , Janardhan Rao Doppa , Sriraam Natarajan

In this paper, we consider the task of one-shot object detection, which consists in detecting objects defined by a single demonstration. Differently from the standard object detection, the classes of objects used for training and testing do…

Computer Vision and Pattern Recognition · Computer Science 2020-08-20 Anton Osokin , Denis Sumin , Vasily Lomakin