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Accuracy anomaly detection in user-level social multimedia traffic is crucial for privacy security. Compared with existing models that passively detect specific anomaly classes with large labeled training samples, user-level social…

Cryptography and Security · Computer Science 2024-09-04 Tongtong Feng , Qi Qi , Jingyu Wang

Amodal segmentation is a challenging task that aims to predict the complete geometric shape of objects, including their occluded regions. Although existing methods primarily focus on amodal segmentation within the training domain, these…

Computer Vision and Pattern Recognition · Computer Science 2026-04-23 Bo Zhang , Zhuotao Tian , Xin Tao , Songlin Tang , Jun Yu , Wenjie Pei

Out-of-distribution (OOD) object detection is a challenging task due to the absence of open-set OOD data. Inspired by recent advancements in text-to-image generative models, such as Stable Diffusion, we study the potential of generative…

Computer Vision and Pattern Recognition · Computer Science 2024-09-10 Jiahui Liu , Xin Wen , Shizhen Zhao , Yingxian Chen , Xiaojuan Qi

Detecting out-of-distribution (OOD) inputs is pivotal for deploying safe vision systems in open-world environments. We revisit diffusion models, not as generators, but as universal perceptual templates for OOD detection. This research…

Computer Vision and Pattern Recognition · Computer Science 2025-07-31 Lemar Abdi , Amaan Valiuddin , Francisco Caetano , Christiaan Viviers , Fons van der Sommen

Out-Of-Distribution (OOD) detection is critical to deploy deep learning models in safety-critical applications. However, the inherent hierarchical concept structure of visual data, which is instrumental to OOD detection, is often poorly…

Computer Vision and Pattern Recognition · Computer Science 2024-09-26 Alvaro Gonzalez-Jimenez , Simone Lionetti , Dena Bazazian , Philippe Gottfrois , Fabian Gröger , Marc Pouly , Alexander Navarini

High-quality Earth Observation (EO) imagery is essential for accurate analysis and informed decision making across sectors. However, data scarcity caused by atmospheric conditions, seasonal variations, and limited geographical coverage…

Computer Vision and Pattern Recognition · Computer Science 2025-03-27 Tiago Sousa , Benoît Ries , Nicolas Guelfi

In many manufacturing settings, annotating data for machine learning and computer vision is costly, but synthetic data can be generated at significantly lower cost. Substituting the real-world data with synthetic data is therefore appealing…

Machine Learning · Computer Science 2024-06-28 Lukas Malte Kemeter , Rasmus Hvingelby , Paulina Sierak , Tobias Schön , Bishwajit Gosswam

Universal anomaly detection still remains a challenging problem in machine learning and medical image analysis. It is possible to learn an expected distribution from a single class of normative samples, e.g., through epistemic uncertainty…

Computer Vision and Pattern Recognition · Computer Science 2023-10-03 Johanna P. Müller , Matthew Baugh , Jeremy Tan , Mischa Dombrowski , Bernhard Kainz

Unsupervised Domain Adaptation (UDA) aims at improving the generalization capability of a model trained on a source domain to perform well on a target domain for which no labeled data is available. In this paper, we consider the semantic…

Computer Vision and Pattern Recognition · Computer Science 2020-04-28 Teo Spadotto , Marco Toldo , Umberto Michieli , Pietro Zanuttigh

Multi-class anomaly detection aims to build unified models across diverse product categories. However, as the number of categories grows, its performance often degrades due to increasingly complex and heterogeneous normal distributions. To…

Computer Vision and Pattern Recognition · Computer Science 2026-05-26 Yaoxuan Feng , Yuxin Li , Weijiang Lv , Zixuan Zhao , Yubiao Wang , Wenchao Chen , Bo Chen , Hongwei Liu

This paper presents a novel anomaly detection methodology termed Statistical Aggregated Anomaly Detection (SAAD). The SAAD approach integrates advanced statistical techniques with machine learning, and its efficacy is demonstrated through…

Machine Learning · Computer Science 2024-06-14 Dacian Goina , Eduard Hogea , George Maties

Due to the high cost of collection and labeling, there are relatively few datasets for camouflaged object detection (COD). In particular, for certain specialized categories, the available image dataset is insufficiently populated. Synthetic…

Computer Vision and Pattern Recognition · Computer Science 2025-09-30 Zhihao Luo , Luojun Lin , Zheng Lin

Segmenting objects in an environment is a crucial task for autonomous driving and robotics, as it enables a better understanding of the surroundings of each agent. Although camera sensors provide rich visual details, they are vulnerable to…

Computer Vision and Pattern Recognition · Computer Science 2025-05-07 Huawei Sun , Bora Kunter Sahin , Georg Stettinger , Maximilian Bernhard , Matthias Schubert , Robert Wille

We present an overview and evaluation of a new, systematic approach for generation of highly realistic, annotated synthetic data for training of deep neural networks in computer vision tasks. The main contribution is a procedural world…

Computer Vision and Pattern Recognition · Computer Science 2017-10-19 Apostolia Tsirikoglou , Joel Kronander , Magnus Wrenninge , Jonas Unger

To operate safely, autonomous vehicles (AVs) need to detect and handle unexpected objects or anomalies on the road. While significant research exists for anomaly detection and segmentation in 2D, research progress in 3D is underexplored.…

Computer Vision and Pattern Recognition · Computer Science 2025-05-06 Alexey Nekrasov , Malcolm Burdorf , Stewart Worrall , Bastian Leibe , Julie Stephany Berrio Perez

Arbitrary-oriented object detection (AOOD) is a challenging task to detect objects in the wild with arbitrary orientations and cluttered arrangements. Existing approaches are mainly based on anchor-based boxes or dense points, which rely on…

Computer Vision and Pattern Recognition · Computer Science 2022-05-26 Linhui Dai , Hong Liu , Hao Tang , Zhiwei Wu , Pinhao Song

Unsupervised Out-of-Distribution (OOD) detection consists in identifying anomalous regions in images leveraging only models trained on images of healthy anatomy. An established approach is to tokenize images and model the distribution of…

Computer Vision and Pattern Recognition · Computer Science 2023-08-04 Sergio Naval Marimont , Vasilis Siomos , Giacomo Tarroni

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

Out-of-distribution (OOD) object detection is an important yet underexplored task. A reliable object detector should be able to handle OOD objects by localizing and correctly classifying them as OOD. However, a critical issue arises when…

Computer Vision and Pattern Recognition · Computer Science 2026-03-18 Sadia Ilyas , Annika Mütze , Klaus Friedrichs , Thomas Kurbiel , Matthias Rottmann

Open-world object detection (OWOD) extends traditional object detection to identifying both known and unknown object, necessitating continuous model adaptation as new annotations emerge. Current approaches face significant limitations: 1)…

Computer Vision and Pattern Recognition · Computer Science 2025-07-29 Junwen Duan , Wei Xue , Ziyao Kang , Shixia Liu , Jiazhi Xia