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The authentication field is evolving towards mechanisms able to keep users continuously authenticated without the necessity of remembering or possessing authentication credentials. While existing continuous authentication systems have…

Mobile devices and technologies have become increasingly popular, offering comparable storage and computational capabilities to desktop computers allowing users to store and interact with sensitive and private information. The security and…

Cryptography and Security · Computer Science 2020-05-12 Mohammed Abuhamad , Ahmed Abusnaina , DaeHun Nyang , David Mohaisen

Attention mechanism has recently attracted increasing attentions in the field of facial action unit (AU) detection. By finding the region of interest of each AU with the attention mechanism, AU-related local features can be captured. Most…

Computer Vision and Pattern Recognition · Computer Science 2019-10-21 Zhiwen Shao , Zhilei Liu , Jianfei Cai , Yunsheng Wu , Lizhuang Ma

Facial motion capture in mixed reality headsets enables real-time avatar animation, allowing users to convey non-verbal cues during virtual interactions. However, as facial motion data constitutes a behavioral biometric, its use raises…

Cryptography and Security · Computer Science 2025-07-16 Adriano Castro , Simon Hanisch , Matin Fallahi , Thorsten Strufe

This work proposes and analyzes the use of keystroke biometrics for content de-anonymization. Fake news have become a powerful tool to manipulate public opinion, especially during major events. In particular, the massive spread of fake news…

Cryptography and Security · Computer Science 2020-05-19 Aythami Morales , Alejandro Acien , Julian Fierrez , John V. Monaco , Ruben Tolosana , Ruben Vera-Rodriguez , Javier Ortega-Garcia

We present a minimalistic but effective neural network that computes dense facial correspondences in highly unconstrained RGB images. Our network learns a per-pixel flow and a matchability mask between 2D input photographs of a person and…

Computer Vision and Pattern Recognition · Computer Science 2017-09-05 Ronald Yu , Shunsuke Saito , Haoxiang Li , Duygu Ceylan , Hao Li

We address the use of selfie ocular images captured with smartphones to estimate age and gender. Partial face occlusion has become an issue due to the mandatory use of face masks. Also, the use of mobile devices has exploded, with the…

Computer Vision and Pattern Recognition · Computer Science 2021-05-06 Fernando Alonso-Fernandez , Kevin Hernandez Diaz , Silvia Ramis , Francisco J. Perales , Josef Bigun

Human communication is the vocal and non verbal signal to communicate with others. Human expression is a significant biometric object in picture and record databases of surveillance systems. Face appreciation has a serious role in biometric…

Computer Vision and Pattern Recognition · Computer Science 2023-05-12 P. Deivendran , P. Suresh Babu , G. Malathi , K. Anbazhagan , R. Senthil Kumar

The human face has a high potential for biometric identification due to its many individual traits. At the same time, such identification is vulnerable to biometric copies. These presentation attacks pose a great challenge in unsupervised…

Computer Vision and Pattern Recognition · Computer Science 2021-08-11 Martin Thümmel , Sven Sickert , Joachim Denzler

Prevailing user authentication schemes on smartphones rely on explicit user interaction, where a user types in a passcode or presents a biometric cue such as face, fingerprint, or iris. In addition to being cumbersome and obtrusive to the…

Computer Vision and Pattern Recognition · Computer Science 2019-01-17 Debayan Deb , Arun Ross , Anil K. Jain , Kwaku Prakah-Asante , K. Venkatesh Prasad

Facial recognition has always been a challeng- ing task for computer vision scientists and experts. Despite complexities arising due to variations in camera parameters, illumination and face orientations, significant progress has been made…

Computer Vision and Pattern Recognition · Computer Science 2018-09-11 Saumya Kumaar , Abhinandan Dogra , Abrar Majeedi , Hanan Gani , Ravi M. Vishwanath , S N Omkar

Visual speech recognition is a technique to identify spoken content in silent speech videos, which has raised significant attention in recent years. Advancements in data-driven deep learning methods have significantly improved both the…

Computer Vision and Pattern Recognition · Computer Science 2025-08-12 Lei Yang , Junshan Jin , Mingyuan Zhang , Yi He , Bofan Chen , Shilin Wang

Facial expression recognition is a crucial component in enhancing human-computer interaction and developing emotion-aware systems. Real-time detection and interpretation of facial expressions have become increasingly important for various…

Computer Vision and Pattern Recognition · Computer Science 2025-12-08 Talha Enes Koksal , Abdurrahman Gumus

We present a face detection algorithm based on Deformable Part Models and deep pyramidal features. The proposed method called DP2MFD is able to detect faces of various sizes and poses in unconstrained conditions. It reduces the gap in…

Computer Vision and Pattern Recognition · Computer Science 2015-08-19 Rajeev Ranjan , Vishal M. Patel , Rama Chellappa

Simulating facial appearance change following bony movement is a critical step in orthognathic surgical planning for patients with jaw deformities. Conventional biomechanics-based methods such as the finite-element method (FEM) are labor…

Computer Vision and Pattern Recognition · Computer Science 2022-10-06 Xi Fang , Daeseung Kim , Xuanang Xu , Tianshu Kuang , Hannah H. Deng , Joshua C. Barber , Nathan Lampen , Jaime Gateno , Michael A. K. Liebschner , James J. Xia , Pingkun Yan

Latent space-based facial attribute editing methods have gained popularity in applications such as digital entertainment, virtual avatar creation, and human-computer interaction systems due to their potential for efficient and flexible…

Computer Vision and Pattern Recognition · Computer Science 2026-03-17 Bo Liu , Xuan Cui , Run Zeng , Wei Duan , Chongwen Liu , Jinrui Qian , Lianggui Tang , Hongping Gan

Today, deep learning represents the most popular and successful form of machine learning. Deep learning has revolutionised the field of pattern recognition, including biometric recognition. Biometric systems utilising deep learning have…

Computer Vision and Pattern Recognition · Computer Science 2023-03-07 Christian Rathgeb , Jascha Kolberg , Andreas Uhl , Christoph Busch

Cameras are prevalent in our daily lives, and enable many useful systems built upon computer vision technologies such as smart cameras and home robots for service applications. However, there is also an increasing societal concern as the…

Computer Vision and Pattern Recognition · Computer Science 2020-10-01 Xiuye Gu , Weixin Luo , Michael S. Ryoo , Yong Jae Lee

For the time being, mobile devices employ implicit authentication mechanisms, namely, unlock patterns, PINs or biometric-based systems such as fingerprint or face recognition. While these systems are prone to well-known attacks, the…

Machine Learning · Computer Science 2020-11-09 Cezara Benegui , Radu Tudor Ionescu

The widespread adoption of face recognition has led to increasing privacy concerns, as unauthorized access to face images can expose sensitive personal information. This paper explores face image protection against viewing and recovery…

Computer Vision and Pattern Recognition · Computer Science 2024-03-20 Yuxi Mi , Zhizhou Zhong , Yuge Huang , Jiazhen Ji , Jianqing Xu , Jun Wang , Shaoming Wang , Shouhong Ding , Shuigeng Zhou