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Video anomaly detection (VAD) often learns the distribution of normal samples and detects the anomaly through measuring significant deviations, but the undesired generalization may reconstruct a few anomalies thus suppressing the…

Computer Vision and Pattern Recognition · Computer Science 2026-05-26 Jiahao Lyu , Minghua Zhao , Jing Hu , Xuewen Huang , Shuangli Du , Cheng Shi , Zhiyong Lv

Graph anomaly detection (GAD) aims to identify abnormal nodes that differ from the majority of the nodes in a graph, which has been attracting significant attention in recent years. Existing generalist graph models have achieved remarkable…

Machine Learning · Computer Science 2025-06-03 Hezhe Qiao , Chaoxi Niu , Ling Chen , Guansong Pang

Few-shot object detection (FSOD) aims to extract semantic knowledge from limited object instances of novel categories within a target domain. Recent advances in FSOD focus on fine-tuning the base model based on a few objects via…

Computer Vision and Pattern Recognition · Computer Science 2023-12-01 Weikai Li , Hongfeng Wei , Yanlai Wu , Jie Yang , Yudi Ruan , Yuan Li , Ying Tang

Unsupervised anomaly detection (UAD) learns one-class classifiers exclusively with normal (i.e., healthy) images to detect any abnormal (i.e., unhealthy) samples that do not conform to the expected normal patterns. UAD has two main…

Computer Vision and Pattern Recognition · Computer Science 2021-07-01 Yu Tian , Guansong Pang , Fengbei Liu , Yuanhong chen , Seon Ho Shin , Johan W. Verjans , Rajvinder Singh , Gustavo Carneiro

Few-shot segmentation (FSS) aims to rapidly learn novel class concepts from limited examples to segment specific targets in unseen images, and has been widely applied in areas such as medical diagnosis and industrial inspection. However,…

Computer Vision and Pattern Recognition · Computer Science 2026-03-31 Qianyu Guo , Jingrong Wu , Jieji Ren , Weifeng Ge , Wenqiang Zhang

Few-shot object detection (FSOD) seeks to detect novel categories with limited data by leveraging prior knowledge from abundant base data. Generalized few-shot object detection (G-FSOD) aims to tackle FSOD without forgetting previously seen…

Computer Vision and Pattern Recognition · Computer Science 2022-04-12 Karim Guirguis , Ahmed Hendawy , George Eskandar , Mohamed Abdelsamad , Matthias Kayser , Juergen Beyerer

Current state-of-the-art anomaly detection (AD) methods exploit the powerful representations yielded by large-scale ImageNet training. However, catastrophic forgetting prevents the successful fine-tuning of pre-trained representations on…

Computer Vision and Pattern Recognition · Computer Science 2022-06-14 Oliver Rippel , Arnav Chavan , Chucai Lei , Dorit Merhof

Given a model well-trained with a large-scale base dataset, Few-Shot Class-Incremental Learning (FSCIL) aims at incrementally learning novel classes from a few labeled samples by avoiding overfitting, without catastrophically forgetting all…

Computer Vision and Pattern Recognition · Computer Science 2023-01-25 Yawen Cui , Wanxia Deng , Haoyu Chen , Li Liu

Remote sensing object detection is particularly challenging due to the high resolution, multi-scale features, and diverse ground object characteristics inherent in satellite and UAV imagery. These challenges necessitate more advanced…

Computer Vision and Pattern Recognition · Computer Science 2025-02-12 Hui Lin , Nan Li , Pengjuan Yao , Kexin Dong , Yuhan Guo , Danfeng Hong , Ying Zhang , Congcong Wen

The goal of few-shot image recognition (FSIR) is to identify novel categories with a small number of annotated samples by exploiting transferable knowledge from training data (base categories). Most current studies assume that the…

Computer Vision and Pattern Recognition · Computer Science 2021-03-17 Shuqiang Jiang , Yaohui Zhu , Chenlong Liu , Xinhang Song , Xiangyang Li , Weiqing Min

Recent progress on few-shot learning largely relies on annotated data for meta-learning: base classes sampled from the same domain as the novel classes. However, in many applications, collecting data for meta-learning is infeasible or…

Computer Vision and Pattern Recognition · Computer Science 2020-07-21 Yunhui Guo , Noel C. Codella , Leonid Karlinsky , James V. Codella , John R. Smith , Kate Saenko , Tajana Rosing , Rogerio Feris

Open Set Video Anomaly Detection (OpenVAD) aims to identify abnormal events from video data where both known anomalies and novel ones exist in testing. Unsupervised models learned solely from normal videos are applicable to any testing…

Computer Vision and Pattern Recognition · Computer Science 2022-08-24 Yuansheng Zhu , Wentao Bao , Qi Yu

Anomaly detection (AD) aims at detecting abnormal samples that deviate from the expected normal patterns. Generally, it can be trained merely on normal data, without a requirement for abnormal samples, and thereby plays an important role in…

Computer Vision and Pattern Recognition · Computer Science 2025-02-20 Yu Cai , Weiwen Zhang , Hao Chen , Kwang-Ting Cheng

Few-shot class-incremental learning (FSCIL) aims at recognizing novel classes continually with limited novel class samples. A mainstream baseline for FSCIL is first to train the whole model in the base session, then freeze the feature…

Computer Vision and Pattern Recognition · Computer Science 2024-02-02 Li-Jun Zhao , Zhen-Duo Chen , Zi-Chao Zhang , Xin Luo , Xin-Shun Xu

The objective of this paper is few-shot object detection (FSOD) -- the task of expanding an object detector for a new category given only a few instances for training. We introduce a simple pseudo-labelling method to source high-quality…

Computer Vision and Pattern Recognition · Computer Science 2022-03-30 Prannay Kaul , Weidi Xie , Andrew Zisserman

With increased reliance on Internet based technologies, cyberattacks compromising users' sensitive data are becoming more prevalent. The scale and frequency of these attacks are escalating rapidly, affecting systems and devices connected to…

Cryptography and Security · Computer Science 2023-04-18 Rahul Kale , Vrizlynn L. L. Thing

Semi-supervised anomaly detection (SSAD) methods have demonstrated their effectiveness in enhancing unsupervised anomaly detection (UAD) by leveraging few-shot but instructive abnormal instances. However, the dominance of homogeneous normal…

Machine Learning · Computer Science 2023-09-07 Yixuan Zhou , Peiyu Yang , Yi Qu , Xing Xu , Zhe Sun , Andrzej Cichocki

Humans detect real-world object anomalies by perceiving, interacting, and reasoning based on object-conditioned physical knowledge. The long-term goal of Industrial Anomaly Detection (IAD) is to enable machines to autonomously replicate…

Computer Vision and Pattern Recognition · Computer Science 2025-03-27 Wenqiao Li , Yao Gu , Xintao Chen , Xiaohao Xu , Ming Hu , Xiaonan Huang , Yingna Wu

In contemporary society, surveillance anomaly detection, i.e., spotting anomalous events such as crimes or accidents in surveillance videos, is a critical task. As anomalies occur rarely, most training data consists of unlabeled videos…

Computer Vision and Pattern Recognition · Computer Science 2022-08-05 MyeongAh Cho , Taeoh Kim , Woo Jin Kim , Suhwan Cho , Sangyoun Lee

Cross-domain few-shot learning (CD-FSL) requires models to generalize from limited labeled samples under significant distribution shifts. While recent methods enhance adaptability through lightweight task-specific modules, they operate…

Computer Vision and Pattern Recognition · Computer Science 2025-05-14 Ruixiao Shi , Fu Feng , Yucheng Xie , Jing Wang , Xin Geng