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Facial action units (AUs) detection is fundamental to facial expression analysis. As AU occurs only in a small area of the face, region-based learning has been widely recognized useful for AU detection. Most region-based studies focus on a…

Computer Vision and Pattern Recognition · Computer Science 2020-02-12 Yao Xia

Facial action unit (FAU) intensities are popular descriptors for the analysis of facial behavior. However, FAUs are sparsely represented when only a few are activated at a time. In this study, we explore the possibility of representing the…

Computer Vision and Pattern Recognition · Computer Science 2021-08-24 Minh Tran , Ellen Bradley , Michelle Matvey , Joshua Woolley , Mohammad Soleymani

Recognizing human emotion/expressions automatically is quite an expected ability for intelligent robotics, as it can promote better communication and cooperation with humans. Current deep-learning-based algorithms may achieve impressive…

Computer Vision and Pattern Recognition · Computer Science 2021-04-05 Tao Pu , Tianshui Chen , Yuan Xie , Hefeng Wu , Liang Lin

The muscular activities caused the activation of certain AUs for every facial expression at the certain duration of time throughout the facial expression. This paper presents the methods to recognise facial Action Unit (AU) using facial…

Computer Vision and Pattern Recognition · Computer Science 2017-12-04 N. Hussain , H. Ujir , I. Hipiny , J-L Minoi

Automatic detection of facial Action Units (AUs) allows for objective facial expression analysis. Due to the high cost of AU labeling and the limited size of existing benchmarks, previous AU detection methods tend to overfit the dataset,…

Computer Vision and Pattern Recognition · Computer Science 2023-08-25 Yufeng Yin , Di Chang , Guoxian Song , Shen Sang , Tiancheng Zhi , Jing Liu , Linjie Luo , Mohammad Soleymani

Micro-Expression Recognition (MER) is a challenging task as the subtle changes occur over different action regions of a face. Changes in facial action regions are formed as Action Units (AUs), and AUs in micro-expressions can be seen as the…

Computer Vision and Pattern Recognition · Computer Science 2021-03-24 Ling Zhou , Qirong Mao , Ming Dong

Multimodal foundation models have significantly improved feature representation by integrating information from multiple modalities, making them highly suitable for a broader set of applications. However, the exploration of multimodal…

Computer Vision and Pattern Recognition · Computer Science 2025-04-15 Kaiwen Zheng , Xuri Ge , Junchen Fu , Jun Peng , Joemon M. Jose

Facial Action Unit (AU) detection is a crucial task for emotion analysis from facial movements. The apparent differences of different subjects sometimes mislead changes brought by AUs, resulting in inaccurate results. However, most of the…

Computer Vision and Pattern Recognition · Computer Science 2023-03-07 Jiyuan Cao , Zhilei Liu , Yong Zhang

This paper describes an approach to the facial action units detections. The involved action units (AU) include AU1 (Inner Brow Raiser), AU2 (Outer Brow Raiser), AU4 (Brow Lowerer), AU6 (Cheek Raise), AU12 (Lip Corner Puller), AU15 (Lip…

Computer Vision and Pattern Recognition · Computer Science 2020-02-11 Xianpeng Ji , Yu Ding , Lincheng Li , Yu Chen , Changjie Fan

Facial Action Unit (AU) detection is a crucial task in affective computing and social robotics as it helps to identify emotions expressed through facial expressions. Anatomically, there are innumerable correlations between AUs, which…

Computer Vision and Pattern Recognition · Computer Science 2023-08-16 Xin Liu , Kaishen Yuan , Xuesong Niu , Jingang Shi , Zitong Yu , Huanjing Yue , Jingyu Yang

Facial action unit (AU) detection remains a challenging task, due to the subtlety, dynamics, and diversity of AUs. Recently, the prevailing techniques of self-attention and causal inference have been introduced to AU detection. However,…

Computer Vision and Pattern Recognition · Computer Science 2024-10-16 Zhiwen Shao , Hancheng Zhu , Yong Zhou , Xiang Xiang , Bing Liu , Rui Yao , Lizhuang Ma

Facial Action Coding System consists of 44 action units (AUs) and more than 7000 combinations. Hidden Markov models (HMMs) classifier has been used successfully to recognize facial action units (AUs) and expressions due to its ability to…

Computer Vision and Pattern Recognition · Computer Science 2010-04-06 Mahmoud Khademi , Mohammad T. Manzuri-Shalmani , Mohammad H. Kiapour , Ali A. Kiaei

Although state-of-the-art classifiers for facial expression recognition (FER) can achieve a high level of accuracy, they lack interpretability, an important feature for end-users. Experts typically associate spatial action units (AUs) from…

Computer Vision and Pattern Recognition · Computer Science 2024-10-04 Soufiane Belharbi , Marco Pedersoli , Alessandro Lameiras Koerich , Simon Bacon , Eric Granger

Human affective behavior analysis plays a vital role in human-computer interaction (HCI) systems. In this paper, we introduce our submission to the CVPR 2023 Competition on Affective Behavior Analysis in-the-wild (ABAW). We propose a…

Computer Vision and Pattern Recognition · Computer Science 2023-03-21 Jun Yu , Renda Li , Zhongpeng Cai , Gongpeng Zhao , Guochen Xie , Jichao Zhu , Wangyuan Zhu

The Facial Action Coding System (FACS) for studying facial expressions is manual and requires significant effort and expertise. This paper explores the use of automated techniques to generate Action Units (AUs) for studying facial…

Computer Vision and Pattern Recognition · Computer Science 2024-06-14 Shivansh Chandra Tripathi , Rahul Garg

Facial Action Coding System is an approach for modeling the complexity of human emotional expression. Automatic action unit (AU) detection is a crucial research area in human-computer interaction. This paper describes our submission to the…

Computer Vision and Pattern Recognition · Computer Science 2022-03-24 Duy Le Hoai , Eunchae Lim , Eunbin Choi , Sieun Kim , Sudarshan Pant , Guee-Sang Lee , Soo-Huyng Kim , Hyung-Jeong Yang

Patient pain can be detected highly reliably from facial expressions using a set of facial muscle-based action units (AUs) defined by the Facial Action Coding System (FACS). A key characteristic of facial expression of pain is the…

Machine Learning · Computer Science 2018-02-21 Zhanli Chen , Rashid Ansari , Diana J. Wilkie

The quantified measurement of facial expressiveness is crucial to analyze human affective behavior at scale. Unfortunately, methods for expressiveness quantification at the video frame-level are largely unexplored, unlike the study of…

Computer Vision and Pattern Recognition · Computer Science 2021-10-08 Md Taufeeq Uddin , Shaun Canavan

Current Facial Action Unit (FAU) detection methods generally encounter difficulties due to the scarcity of labeled video training data and the limited number of training face IDs, which renders the trained feature extractor insufficient…

Computer Vision and Pattern Recognition · Computer Science 2024-07-17 Qiaoqiao Jin , Rui Shi , Yishun Dou , Bingbing Ni

Previous approaches to model and analyze facial expression analysis use three different techniques: facial action units, geometric features and graph based modelling. However, previous approaches have treated these technique separately.…

Computer Vision and Pattern Recognition · Computer Science 2016-06-03 Mehdi Ghayoumi , Arvind K Bansal