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Many existing facial expression recognition (FER) systems encounter substantial performance degradation when faced with variations in head pose. Numerous frontalization methods have been proposed to enhance these systems' performance under…

Computer Vision and Pattern Recognition · Computer Science 2024-04-16 Omar Ikne , Benjamin Allaert , Ioan Marius Bilasco , Hazem Wannous

Airwriting Recognition is the task of identifying letters written in free space with finger movement. Electromyography (EMG) is a technique used to record electrical activity during muscle contraction and relaxation as a result of movement…

Human-Computer Interaction · Computer Science 2022-11-01 Ayush Tripathi , Lalan Kumar , Prathosh A. P. , Suriya Prakash Muthukrishnan

Surface electromyography provides a practical way to infer human movement intention from wearable muscle recordings, but models trained under a single acquisition setting often lose reliability when the user, session, electrode layout, or…

Machine Learning · Computer Science 2026-05-26 Zhenghao Huang , Huilin Yao , Kaikai Wang

Facial expression recognition (FER) aims to analyze emotional states from static images and dynamic sequences, which is pivotal in enhancing anthropomorphic communication among humans, robots, and digital avatars by leveraging AI…

Computer Vision and Pattern Recognition · Computer Science 2024-08-29 Yan Wang , Shaoqi Yan , Yang Liu , Wei Song , Jing Liu , Yang Chang , Xinji Mai , Xiping Hu , Wenqiang Zhang , Zhongxue Gan

Surface Electromyography (sEMG) provides vital insights into muscle function, but it can be noisy and challenging to acquire. Inertial Measurement Units (IMUs) provide a robust and wearable alternative to motion capture systems. This paper…

Machine Learning · Computer Science 2025-11-24 Shubhranil Basak , Mada Hemanth , Madhav Rao

Reconstructing 3D face models from a single image is an inherently ill-posed problem, which becomes even more challenging in the presence of occlusions. In addition to fewer available observations, occlusions introduce an extra source of…

Computer Vision and Pattern Recognition · Computer Science 2025-03-04 Pratheba Selvaraju , Victoria Fernandez Abrevaya , Timo Bolkart , Rick Akkerman , Tianyu Ding , Faezeh Amjadi , Ilya Zharkov

As 3D facial avatars become more widely used for communication, it is critical that they faithfully convey emotion. Unfortunately, the best recent methods that regress parametric 3D face models from monocular images are unable to capture…

Computer Vision and Pattern Recognition · Computer Science 2022-04-26 Radek Danecek , Michael J. Black , Timo Bolkart

Cryo-electron microscopy (cryo-EM) allows for the high-resolution reconstruction of 3D structures of proteins and other biomolecules. Successful reconstruction of both shape and movement greatly helps understand the fundamental processes of…

Computer Vision and Pattern Recognition · Computer Science 2023-10-12 Xinhang Liu , Yan Zeng , Yifan Qin , Hao Li , Jiakai Zhang , Lan Xu , Jingyi Yu

Facial expression recognition (FER) plays a significant role in the ubiquitous application of computer vision. We revisit this problem with a new perspective on whether it can acquire useful representations that improve FER performance in…

Computer Vision and Pattern Recognition · Computer Science 2023-01-04 Jiawei Mao , Guangyi Zhao , Yuanqi Chang , Xuesong Yin , Xiaogang Peng , Rui Xu

Dynamic facial expression recognition has many useful applications in social networks, multimedia content analysis, security systems and others. This challenging process must be done under recurrent problems of image illumination and low…

Computer Vision and Pattern Recognition · Computer Science 2020-12-29 Ali Raza Shahid , Sheheryar Khan , Hong Yan

Surface electromyography (sEMG) signals show promise for effective human-machine interfaces, particularly in rehabilitation and prosthetics. However, challenges remain in developing systems that respond quickly to user intent, produce…

The reconstruction of 3D objects from brain signals has gained significant attention in brain-computer interface (BCI) research. Current research predominantly utilizes functional magnetic resonance imaging (fMRI) for 3D reconstruction…

Graphics · Computer Science 2025-05-06 Xia Deng , Shen Chen , Jiale Zhou , Lei Li

Event-based cameras are bio-inspired sensors that asynchronously capture pixel intensity changes with microsecond latency, high temporal resolution, and high dynamic range, providing information on the spatiotemporal dynamics of a scene. We…

Computer Vision and Pattern Recognition · Computer Science 2026-01-01 Rodrigo Verschae , Ignacio Bugueno-Cordova

We explore surface electromyography (sEMG) as a non-invasive input modality for mapping muscle activity to keyboard inputs, targeting immersive typing in next-generation human-computer interaction (HCI). This is especially relevant for…

Human-Computer Interaction · Computer Science 2025-11-25 Kunwoo Lee , Dhivya Sreedhar , Pushkar Saraf , Chaeeun Lee , Kateryna Shapovalenko

Event cameras offer unique advantages for facial keypoint alignment under challenging conditions, such as low light and rapid motion, due to their high temporal resolution and robustness to varying illumination. However, existing RGB facial…

Computer Vision and Pattern Recognition · Computer Science 2026-03-31 Donghwa Kang , Junho Kim , Dongwoo Kang

This study investigates the impact of electrode shift and sensor reapplication on common surface electromyography (sEMG) features in lower limb muscles, factors which have, thus far, precluded clinicians from being able to attribute…

Signal Processing · Electrical Eng. & Systems 2025-09-19 Fraser Douglas , Mona Pei , Calvin Kuo

Facial expressions convey nonverbal cues which play an important role in interpersonal relations, and are widely used in behavior interpretation of emotions, cognitive science, and social interactions. In this paper we analyze different…

Computer Vision and Pattern Recognition · Computer Science 2016-04-18 Deepak Ghimire , Joonwhoan Lee , Ze-Nian Li , Sunghwan Jeong

Video facial expression recognition is useful for many applications and received much interest lately. Although some solutions give really good results in a controlled environment (no occlusion), recognition in the presence of partial…

Computer Vision and Pattern Recognition · Computer Science 2021-12-06 Delphine Poux , Benjamin Allaert , Nacim Ihaddadene , Ioan Marius Bilasco , Chaabane Djeraba , Mohammed Bennamoun

Facial expression recognition is a pivotal component in machine learning, facilitating various applications. However, convolutional neural networks (CNNs) are often plagued by catastrophic forgetting, impeding their adaptability. The…

Computer Vision and Pattern Recognition · Computer Science 2024-04-19 Israel A. Laurensi , Alceu de Souza Britto , Jean Paul Barddal , Alessandro Lameiras Koerich

Capturing dynamic spatiotemporal neural activity is essential for understanding large-scale brain mechanisms. Functional magnetic resonance imaging (fMRI) provides high-resolution cortical representations that form a strong basis for…

Image and Video Processing · Electrical Eng. & Systems 2026-04-01 Wanying Qu , Jianxiong Gao , Wei Wang , Yanwei Fu