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We present a refined version of the Anomaly Awareness framework for enhancing unsupervised anomaly detection. Our approach introduces minimal supervision into Variational Autoencoders (VAEs) through a two-stage training strategy: the model…

高能物理 - 唯象学 · 物理学 2025-04-17 Adam Banda , Charanjit K. Khosa , Veronica Sanz

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…

计算机视觉与模式识别 · 计算机科学 2022-06-09 Djennifer K. Madzia-Madzou , Hugo J. Kuijf

Generative Models are a valuable tool for the controlled creation of high-quality image data. Controlled diffusion models like the ControlNet have allowed the creation of labeled distributions. Such synthetic datasets can augment the…

计算机视觉与模式识别 · 计算机科学 2025-10-14 Joshua Niemeijer , Jan Ehrhardt , Heinz Handels , Hristina Uzunova

Generating high-quality labeled image datasets is crucial for training accurate and robust machine learning models in the field of computer vision. However, the process of manually labeling real images is often time-consuming and costly. To…

计算机视觉与模式识别 · 计算机科学 2023-09-04 Michael Shenoda , Edward Kim

Visual surface anomaly detection aims to detect local image regions that significantly deviate from normal appearance. Recent surface anomaly detection methods rely on generative models to accurately reconstruct the normal areas and to fail…

计算机视觉与模式识别 · 计算机科学 2021-09-28 Vitjan Zavrtanik , Matej Kristan , Danijel Skočaj

Generative models trained in an unsupervised manner may set high likelihood and low reconstruction loss to Out-of-Distribution (OoD) samples. This increases Type II errors and leads to missed anomalies, overall decreasing Anomaly Detection…

机器学习 · 计算机科学 2022-02-03 Nikolaos Dionelis , Mehrdad Yaghoobi , Sotirios A. Tsaftaris

Class imbalance is a persistent challenge in visual recognition, particularly in safety-critical domains where collecting positive examples is expensive and rare events are inherently underrepresented. We propose a lightweight synthetic…

计算机视觉与模式识别 · 计算机科学 2026-05-13 Daniil Dushenev , Nazariy Karpov , Daniil Zinovjev , Alexander Gorin , Konstantin Kulikov

Few-shot image synthesis entails generating diverse and realistic images of novel categories using only a few example images. While multiple recent efforts in this direction have achieved impressive results, the existing approaches are…

计算机视觉与模式识别 · 计算机科学 2025-06-03 Parul Gupta , Munawar Hayat , Abhinav Dhall , Thanh-Toan Do

Object detection, a quintessential task in the realm of perceptual computing, can be tackled using a generative methodology. In the present study, we introduce a novel framework designed to articulate object detection as a denoising…

计算机视觉与模式识别 · 计算机科学 2025-04-04 Lifan Jiang , Zhihui Wang , Changmiao Wang , Ming Li , Jiaxu Leng

Anomaly detection in time series data, to identify points that deviate from normal behaviour, is a common problem in various domains such as manufacturing, medical imaging, and cybersecurity. Recently, Generative Adversarial Networks (GANs)…

机器学习 · 计算机科学 2025-05-27 Md Abul Bashar , Richi Nayak

Generative Adversarial Networks (GANs) dominate the research field in image-based virtual try-on, but have not resolved problems such as unnatural deformation of garments and the blurry generation quality. While the generative quality of…

计算机视觉与模式识别 · 计算机科学 2024-04-29 Jianhao Zeng , Dan Song , Weizhi Nie , Hongshuo Tian , Tongtong Wang , Anan Liu

Industrial anomaly detection faces significant challenges due to the scarcity of anomalous samples and the complexity of real-world anomalies. In this paper, we propose a foundation model-based anomaly synthesis pipeline (FMAS) that…

计算机视觉与模式识别 · 计算机科学 2026-03-04 Wensheng Wu , Zheming Lu , Ziqian Lu , Zewei He , Xuecheng Sun , Zhao Wang , Jungong Han , Yunlong Yu

Unsupervised anomaly detection is a challenging task. Autoencoders (AEs) or generative models are often employed to model the data distribution of normal inputs and subsequently identify anomalous, out-of-distribution inputs by high…

机器学习 · 计算机科学 2025-06-12 Yalin Liao , Austin J. Brockmeier

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

Generative models, such as Generative Adversarial Networks (GANs), have been used for unsupervised anomaly detection. While performance keeps improving, several limitations exist particularly attributed to difficulties at capturing…

机器学习 · 计算机科学 2022-02-03 Nikolaos Dionelis , Mehrdad Yaghoobi , Sotirios A. Tsaftaris

Anomaly detection has gained considerable attention due to its broad range of applications, particularly in industrial defect detection. To address the challenges of data collection, researchers have introduced zero-/few-shot anomaly…

计算机视觉与模式识别 · 计算机科学 2024-01-03 Chaoqin Huang , Aofan Jiang , Ya Zhang , Yanfeng Wang

Synthesizing realistic and diverse anomalous samples from limited data is vital for robust model generalization. However, existing methods struggle to reconcile fidelity and diversity, often hampered by distribution misalignment and…

计算机视觉与模式识别 · 计算机科学 2026-05-19 Fuyun Wang , Yuanzhi Wang , Xu Guo , Sujia Huang , Tong Zhang , Dan Wang , Hui Yan , Xin Liu , Zhen Cui

We propose a text-guided variational image generation method to address the challenge of getting clean data for anomaly detection in industrial manufacturing. Our method utilizes text information about the target object, learned from…

计算机视觉与模式识别 · 计算机科学 2024-03-27 Mingyu Lee , Jongwon Choi

Automatic image anomaly detection is important for quality inspection in the manufacturing industry. The usual unsupervised anomaly detection approach is to train a model for each object class using a dataset of normal samples. However, a…

计算机视觉与模式识别 · 计算机科学 2024-09-04 Yuanwei Li , Elizaveta Ivanova , Martins Bruveris

Industrial image anomaly detection is a challenging problem owing to extreme class imbalance and the scarcity of labeled defective samples, particularly in few-shot settings. We propose BayPrAnoMeta, a Bayesian generalization of Proto-MAML…

机器学习 · 计算机科学 2026-01-29 Soham Sarkar , Tanmay Sen , Sayantan Banerjee