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This paper considers few-shot anomaly detection (FSAD), a practical yet under-studied setting for anomaly detection (AD), where only a limited number of normal images are provided for each category at training. So far, existing FSAD studies…

计算机视觉与模式识别 · 计算机科学 2022-07-18 Chaoqin Huang , Haoyan Guan , Aofan Jiang , Ya Zhang , Michael Spratling , Yan-Feng Wang

Anomaly detection is a critical and challenging task that aims to identify data points deviating from normal patterns and distributions within a dataset. Various methods have been proposed using a one-class-one-model approach, but these…

机器学习 · 计算机科学 2023-12-07 Jae Young Lee , Wonjun Lee , Jaehyun Choi , Yongkwi Lee , Young Seog Yoon

Few-shot graph anomaly detection (GAD) has recently garnered increasing attention, which aims to discern anomalous patterns among abundant unlabeled test nodes under the guidance of a limited number of labeled training nodes. Existing…

机器学习 · 计算机科学 2024-10-14 Jiazhen Chen , Sichao Fu , Zhibin Zhang , Zheng Ma , Mingbin Feng , Tony S. Wirjanto , Qinmu Peng

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…

密码学与安全 · 计算机科学 2023-04-18 Rahul Kale , Vrizlynn L. L. Thing

Over the past few years, there has been a significant improvement in the domain of few-shot learning. This learning paradigm has shown promising results for the challenging problem of anomaly detection, where the general task is to deal…

计算机视觉与模式识别 · 计算机科学 2022-11-24 Soumyajit Karmakar , Abeer Banerjee , Prashant Sadashiv Gidde , Sumeet Saurav , Sanjay Singh

Anomaly detection methods typically require extensive normal samples from the target class for training, limiting their applicability in scenarios that require rapid adaptation, such as cold start. Zero-shot and few-shot anomaly detection…

计算机视觉与模式识别 · 计算机科学 2026-03-03 Zhaopeng Gu , Bingke Zhu , Guibo Zhu , Yingying Chen , Ming Tang , Jinqiao Wang

In this paper, we explore how to utilize pre-trained language model to perform few-shot text classification where only a few annotated examples are given for each class. Since using traditional cross-entropy loss to fine-tune language model…

计算与语言 · 计算机科学 2022-10-03 Liwen Sun , Jiawei Han

Video anomaly detection aims to identify abnormal events that occurred in videos. Since anomalous events are relatively rare, it is not feasible to collect a balanced dataset and train a binary classifier to solve the task. Thus, most…

计算机视觉与模式识别 · 计算机科学 2022-11-24 Guangyu Sun , Zhang Liu , Lianggong Wen , Jing Shi , Chenliang Xu

Anomaly detection presents a unique challenge in machine learning, due to the scarcity of labeled anomaly data. Recent work attempts to mitigate such problems by augmenting training of deep anomaly detection models with additional labeled…

机器学习 · 计算机科学 2021-05-18 Ziyu Ye , Yuxin Chen , Haitao Zheng

Most existing anomaly detection (AD) methods require a dedicated model for each category. Such a paradigm, despite its promising results, is computationally expensive and inefficient, thereby failing to meet the requirements for realworld…

计算机视觉与模式识别 · 计算机科学 2024-10-10 Chaoqin Huang , Haoyan Guan , Aofan Jiang , Ya Zhang , Michael Spratling , Xinchao Wang , Yanfeng Wang

Graph anomaly detection has long been an important problem in various domains pertaining to information security such as financial fraud, social spam and network intrusion. The majority of existing methods are performed in an unsupervised…

机器学习 · 计算机科学 2024-08-27 Xiongxiao Xu , Kaize Ding , Canyu Chen , Kai Shu

Recent Anomaly Detection techniques have progressed the field considerably but at the cost of increasingly complex training pipelines. Such techniques require large amounts of training data, resulting in computationally expensive algorithms…

机器学习 · 计算机科学 2023-06-14 Niamh Belton , Misgina Tsighe Hagos , Aonghus Lawlor , Kathleen M. Curran

We consider the problem of anomaly detection with a small set of partially labeled anomaly examples and a large-scale unlabeled dataset. This is a common scenario in many important applications. Existing related methods either exclusively…

机器学习 · 计算机科学 2021-06-11 Guansong Pang , Anton van den Hengel , Chunhua Shen , Longbing Cao

Anomaly detection from graph data is an important data mining task in many applications such as social networks, finance, and e-commerce. Existing efforts in graph anomaly detection typically only consider the information in a single scale…

机器学习 · 计算机科学 2024-08-02 Yu Zheng , Ming Jin , Yixin Liu , Lianhua Chi , Khoa T. Phan , Yi-Ping Phoebe Chen

Recent vision-language models (e.g., CLIP) have demonstrated remarkable class-generalizable ability to unseen classes in few-shot anomaly segmentation (FSAS), leveraging supervised prompt learning or fine-tuning on seen classes. However,…

计算机视觉与模式识别 · 计算机科学 2025-08-22 Zhen Qu , Xian Tao , Xinyi Gong , ShiChen Qu , Xiaopei Zhang , Xingang Wang , Fei Shen , Zhengtao Zhang , Mukesh Prasad , Guiguang Ding

Few-shot Learning aims to learn and distinguish new categories with a very limited number of available images, presenting a significant challenge in the realm of deep learning. Recent researchers have sought to leverage the additional…

计算机视觉与模式识别 · 计算机科学 2024-03-26 Chunpeng Zhou , Haishuai Wang , Xilu Yuan , Zhi Yu , Jiajun Bu

Few-shot learning aims to build classifiers for new classes from a small number of labeled examples and is commonly facilitated by access to examples from a distinct set of 'base classes'. The difference in data distribution between the…

计算机视觉与模式识别 · 计算机科学 2021-04-26 Zitian Chen , Subhransu Maji , Erik Learned-Miller

Few-shot learning is a type of classification through which predictions are made based on a limited number of samples for each class. This type of classification is sometimes referred to as a meta-learning problem, in which the model learns…

音频与语音处理 · 电气工程与系统科学 2022-11-02 Leah Chowenhill , Gaurav Satyanath , Shubhranshu Singh , Madhav Mahendra Wagh

Test-time task adaptation in few-shot learning aims to adapt a pre-trained task-agnostic model for capturing taskspecific knowledge of the test task, rely only on few-labeled support samples. Previous approaches generally focus on…

计算机视觉与模式识别 · 计算机科学 2023-12-19 Ji Zhang , Lianli Gao , Xu Luo , Hengtao Shen , Jingkuan Song

Large pre-trained language models have shown promise for few-shot learning, completing text-based tasks given only a few task-specific examples. Will models soon solve classification tasks that have so far been reserved for human research…