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Face Recognition Systems (FRS) are vulnerable to morph attacks. A face morph is created by combining multiple identities with the intention to fool FRS and making it match the morph with multiple identities. Current Morph Attack Detection…

Computer Vision and Pattern Recognition · Computer Science 2023-08-23 Nitish Shukla

Deep unsupervised approaches are gathering increased attention for applications such as pathology detection and segmentation in medical images since they promise to alleviate the need for large labeled datasets and are more generalizable…

Computer Vision and Pattern Recognition · Computer Science 2023-08-01 Ioannis Lagogiannis , Felix Meissen , Georgios Kaissis , Daniel Rueckert

Self-supervised learning (SSL) has emerged as a powerful paradigm for learning representations without labeled data. Most SSL approaches rely on strong, well-established, handcrafted data augmentations to generate diverse views for…

Machine Learning · Computer Science 2026-01-16 Berken Utku Demirel , Christian Holz

Face anti-spoofing is critical to the security of face recognition systems. Depth supervised learning has been proven as one of the most effective methods for face anti-spoofing. Despite the great success, most previous works still…

Computer Vision and Pattern Recognition · Computer Science 2020-03-19 Zezheng Wang , Zitong Yu , Chenxu Zhao , Xiangyu Zhu , Yunxiao Qin , Qiusheng Zhou , Feng Zhou , Zhen Lei

Face presentation attack detection (PAD) is an essential measure to protect face recognition systems from being spoofed by malicious users and has attracted great attention from both academia and industry. Although most of the existing…

Computer Vision and Pattern Recognition · Computer Science 2021-10-22 Zhi Li , Haoliang Li , Xin Luo , Yongjian Hu , Kwok-Yan Lam , Alex C. Kot

Unsupervised anomaly detection (UAD) methods are trained with normal (or healthy) images only, but during testing, they are able to classify normal and abnormal (or disease) images. UAD is an important medical image analysis (MIA) method to…

Image and Video Processing · Electrical Eng. & Systems 2023-08-16 Yu Tian , Fengbei Liu , Guansong Pang , Yuanhong Chen , Yuyuan Liu , Johan W. Verjans , Rajvinder Singh , Gustavo Carneiro

Unsupervised person re-identification (re-ID) has attracted increasing research interests because of its scalability and possibility for real-world applications. State-of-the-art unsupervised re-ID methods usually follow a clustering-based…

Computer Vision and Pattern Recognition · Computer Science 2022-07-08 Tianyang Liu , Yutian Lin , Bo Du

Self-supervised learning (SSL) has emerged as a promising alternative to create supervisory signals to real-world problems, avoiding the extensive cost of manual labeling. SSL is particularly attractive for unsupervised tasks such as…

Machine Learning · Computer Science 2023-07-31 Jaemin Yoo , Tiancheng Zhao , Leman Akoglu

Supervised fine-tuning methods (SFT) perform great efficiency on artificial intelligence interpretation in SAR images, leveraging the powerful representation knowledge from pre-training models. Due to the lack of domain-specific pre-trained…

Computer Vision and Pattern Recognition · Computer Science 2025-01-22 Xinyang Pu , Feng Xu

3D object detection is essential for autonomous driving and robotic perception, yet its reliance on large-scale manually annotated data limits scalability and adaptability. To reduce annotation dependency, unsupervised and…

Computer Vision and Pattern Recognition · Computer Science 2026-04-14 Yushen He , Lei Zhao , Weidong Chen

Self-supervised learning approaches leverage unlabeled samples to acquire generic knowledge about different concepts, hence allowing for annotation-efficient downstream task learning. In this paper, we propose a novel self-supervised method…

Computer Vision and Pattern Recognition · Computer Science 2020-10-27 Aiham Taleb , Christoph Lippert , Tassilo Klein , Moin Nabi

Over the past years, the main research innovations in face recognition focused on training deep neural networks on large-scale identity-labeled datasets using variations of multi-class classification losses. However, many of these datasets…

Computer Vision and Pattern Recognition · Computer Science 2022-11-15 Fadi Boutros , Marcel Klemt , Meiling Fang , Arjan Kuijper , Naser Damer

Face morphing attacks compromise biometric security by creating document images that verify against multiple identities, posing significant risks from document issuance to border control. Differential Morphing Attack Detection (D-MAD)…

Computer Vision and Pattern Recognition · Computer Science 2026-03-31 Raul Ismayilov , Luuk Spreeuwers

Deep neural networks are capable of learning powerful representations to tackle complex vision tasks but expose undesirable properties like the over-fitting issue. To this end, regularization techniques like image augmentation are necessary…

Computer Vision and Pattern Recognition · Computer Science 2025-04-17 Haohang Xu , Shuangrui Ding , Manqi Zhao , Dongsheng Jiang

Small area change detection from synthetic aperture radar (SAR) is a highly challenging task. In this paper, a robust unsupervised approach is proposed for small area change detection from multi-temporal SAR images using deep learning.…

Computer Vision and Pattern Recognition · Computer Science 2020-11-24 Xinzheng Zhang , Hang Su , Ce Zhang , Xiaowei Gu , Xiaoheng Tan , Peter M. Atkinson

Effective suppression of surface-related multiples is essential to prevent imaging artifacts and erroneous structural interpretations. While conventional approaches rely on accurate priors or subsurface model knowledge, and supervised…

Geophysics · Physics 2026-05-01 Huan Song , Shijun Cheng , Huanhuan Tang , Wei Ouyang , Weijian Mao

Prevailing defense mechanisms against adversarial face images tend to overfit to the adversarial perturbations in the training set and fail to generalize to unseen adversarial attacks. We propose a new self-supervised adversarial defense…

Computer Vision and Pattern Recognition · Computer Science 2021-04-07 Debayan Deb , Xiaoming Liu , Anil K. Jain

Supervised learning-based adversarial attack detection methods rely on a large number of labeled data and suffer significant performance degradation when applying the trained model to new domains. In this paper, we propose a self-supervised…

Computer Vision and Pattern Recognition · Computer Science 2024-07-08 Yi Li , Plamen Angelov , Neeraj Suri

The proliferation of IoT devices has significantly increased network vulnerabilities, creating an urgent need for effective Intrusion Detection Systems (IDS). Machine Learning-based IDS (ML-IDS) offer advanced detection capabilities but…

Cryptography and Security · Computer Science 2025-02-12 Elvin Li , Zhengli Shang , Onat Gungor , Tajana Rosing

Log analysis is one of the main techniques that engineers use for troubleshooting large-scale software systems. Over the years, many supervised, semi-supervised, and unsupervised log analysis methods have been proposed to detect system…

Software Engineering · Computer Science 2024-04-22 Yongzheng Xie , Hongyu Zhang , Muhammad Ali Babar