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The adoption of large-scale iris recognition systems around the world has brought to light the importance of detecting presentation attack images (textured contact lenses and printouts). This work presents a new approach in iris…

Computer Vision and Pattern Recognition · Computer Science 2018-11-27 Andrey Kuehlkamp , Allan Pinto , Anderson Rocha , Kevin Bowyer , Adam Czajka

The clinical time-series setting poses a unique combination of challenges to data modeling and sharing. Due to the high dimensionality of clinical time series, adequate de-identification to preserve privacy while retaining data utility is…

Privacy issue is a main concern in developing face recognition techniques. Although synthetic face images can partially mitigate potential legal risks while maintaining effective face recognition (FR) performance, FR models trained by face…

Computer Vision and Pattern Recognition · Computer Science 2024-11-01 Zhonglin Sun , Siyang Song , Ioannis Patras , Georgios Tzimiropoulos

Biometric systems are nowadays employed across a broad range of applications. They provide high security and efficiency and, in many cases, are user friendly. Despite these and other advantages, biometric systems in general and Automatic…

Synthetic data has garnered attention as a Privacy Enhancing Technology (PET) in sectors such as healthcare and finance. When using synthetic data in practical applications, it is important to provide protection guarantees. In the…

The use of synthetic data for training computer vision algorithms has become increasingly popular due to its cost-effectiveness, scalability, and ability to provide accurate multi-modality labels. Although recent studies have demonstrated…

Computer Vision and Pattern Recognition · Computer Science 2023-03-28 Eli Friedman , Assaf Lehr , Alexey Gruzdev , Vladimir Loginov , Max Kogan , Moran Rubin , Orly Zvitia

Face recognition systems are often used for biometric authentication. Nevertheless, it is known that without any protective measures, face recognition systems are vulnerable to presentation attacks. To tackle this security problem, methods…

Computer Vision and Pattern Recognition · Computer Science 2026-04-22 Mathias Ibsen , Loris Tim Ide , Christian Rathgeb , Christoph Busch

Images of morphed faces pose a serious threat to face recognition--based security systems, as they can be used to illegally verify the identity of multiple people with a single morphed image. Modern detection algorithms learn to identify…

Computer Vision and Pattern Recognition · Computer Science 2022-07-05 Marija Ivanovska , Andrej Kronovšek , Peter Peer , Vitomir Štruc , Borut Batagelj

Synthetic image generation has opened up new opportunities but has also created threats in regard to privacy, authenticity, and security. Detecting fake images is of paramount importance to prevent illegal activities, and previous research…

Computer Vision and Pattern Recognition · Computer Science 2023-02-27 Md Awsafur Rahman , Bishmoy Paul , Najibul Haque Sarker , Zaber Ibn Abdul Hakim , Shaikh Anowarul Fattah

This paper investigates the use of synthetic face data to enhance Single-Morphing Attack Detection (S-MAD), addressing the limitations of availability of large-scale datasets of bona fide images due to privacy concerns. Various morphing…

Computer Vision and Pattern Recognition · Computer Science 2025-10-14 David Benavente-Rios , Juan Ruiz Rodriguez , Gustavo Gatica

Deep learning-based face recognition (FR) technology exacerbates privacy concerns in photo sharing. In response, the research community developed a suite of anti-FR methods to block identity extraction by unauthorized FR systems. Benefiting…

Cryptography and Security · Computer Science 2025-09-16 Tao Wang , Yushu Zhang , Xiangli Xiao , Kun Xu , Lin Yuan , Wenying Wen , Yuming Fang

Although face recognition systems have seen a massive performance enhancement in recent years, they are still targeted by threats such as presentation attacks, leading to the need for generalizable presentation attack detection (PAD)…

Computer Vision and Pattern Recognition · Computer Science 2025-01-07 Guray Ozgur , Eduarda Caldeira , Tahar Chettaoui , Fadi Boutros , Raghavendra Ramachandra , Naser Damer

We have witnessed rapid advances in both face presentation attack models and presentation attack detection (PAD) in recent years. When compared with widely studied 2D face presentation attacks, 3D face spoofing attacks are more challenging…

Computer Vision and Pattern Recognition · Computer Science 2020-12-15 Shan Jia , Xin Li , Chuanbo Hu , Guodong Guo , Zhengquan Xu

Nowadays, the development of a Presentation Attack Detection (PAD) system for ID cards presents a challenge due to the lack of images available to train a robust PAD system and the increase in diversity of possible attack instrument…

Computer Vision and Pattern Recognition · Computer Science 2025-08-19 Qingwen Zeng , Juan E. Tapia , Izan Garcia , Juan M. Espin , Christoph Busch

Synthetic data generation, leveraging generative machine learning techniques, offers a promising approach to mitigating privacy concerns associated with real-world data usage. Synthetic data closely resembles real-world data while…

Machine Learning · Computer Science 2025-08-25 Weijie Niu , Alberto Huertas Celdran , Karoline Siarsky , Burkhard Stiller

The diffusion of fingerprint verification systems for security applications makes it urgent to investigate the embedding of software-based presentation attack detection algorithms (PAD) into such systems. Companies and institutions need to…

Cryptography and Security · Computer Science 2021-10-22 Marco Micheletto , Gian Luca Marcialis , Giulia Orrù , Fabio Roli

Facial landmark localization is a very crucial step in numerous face related applications, such as face recognition, facial pose estimation, face image synthesis, etc. However, previous competitions on facial landmark localization (i.e.,…

Computer Vision and Pattern Recognition · Computer Science 2019-07-25 Yinglu Liu , Hao Shen , Yue Si , Xiaobo Wang , Xiangyu Zhu , Hailin Shi , Zhibin Hong , Hanqi Guo , Ziyuan Guo , Yanqin Chen , Bi Li , Teng Xi , Jun Yu , Haonian Xie , Guochen Xie , Mengyan Li , Qing Lu , Zengfu Wang , Shenqi Lai , Zhenhua Chai , Xiaoming Wei

Presentation Attack Detection (PAD) has been extensively studied, particularly in the visible spectrum. With the advancement of sensing technology beyond the visible range, multispectral imaging has gained significant attention in this…

Computer Vision and Pattern Recognition · Computer Science 2023-11-21 Narayan Vetrekar , Raghavendra Ramachandra , Sushma Venkatesh , Jyoti D. Pawar , R. S. Gad

Facial expression datasets remain limited in scale due to the subjectivity of annotations and the labor-intensive nature of data collection. This limitation poses a significant challenge for developing modern deep learning-based facial…

Computer Vision and Pattern Recognition · Computer Science 2025-08-13 Xilin He , Cheng Luo , Xiaole Xian , Bing Li , Muhammad Haris Khan , Zongyuan Ge , Weicheng Xie , Siyang Song , Linlin Shen , Bernard Ghanem , Xiangyu Yue

Recognizing pain in video is crucial for improving patient-computer interaction systems, yet traditional data collection in this domain raises significant ethical and logistical challenges. This study introduces a novel approach that…

Computer Vision and Pattern Recognition · Computer Science 2024-09-26 Jonas Nasimzada , Jens Kleesiek , Ken Herrmann , Alina Roitberg , Constantin Seibold