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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

Despite their continued popularity, categorical approaches to affect recognition have limitations, especially in real-life situations. Dimensional models of affect offer important advantages for the recognition of subtle expressions and…

Computer Vision and Pattern Recognition · Computer Science 2021-06-16 Vassilios Vonikakis , Stefan Winkler

In-the-wild dynamic facial expression recognition (DFER) encounters a significant challenge in recognizing emotion-related expressions, which are often temporally and spatially diluted by emotion-irrelevant expressions and global context.…

Computer Vision and Pattern Recognition · Computer Science 2024-12-19 Xingjian Wang , Li Chai

Capturing complex temporal relationships between video and audio modalities is vital for Audio-Visual Emotion Recognition (AVER). However, existing methods lack attention to local details, such as facial state changes between video frames,…

Computer Vision and Pattern Recognition · Computer Science 2024-05-28 Tong Shi , Xuri Ge , Joemon M. Jose , Nicolas Pugeault , Paul Henderson

Microexpressions are fast and spatially small facial expressions that are difficult to detect. Therefore motion magnification techniques, which aim at amplifying and hence revealing subtle motion in videos, appear useful for handling such…

Computer Vision and Pattern Recognition · Computer Science 2024-01-17 Philipp Flotho , Cosmas Heiss , Gabriele Steidl , Daniel J. Strauss

Dynamic facial expression recognition (DFER) infers emotions from the temporal evolution of expressions, unlike static facial expression recognition (SFER), which relies solely on a single snapshot. This temporal analysis provides richer…

Computer Vision and Pattern Recognition · Computer Science 2025-10-31 Yin Chen , Jia Li , Yu Zhang , Zhenzhen Hu , Shiguang Shan , Meng Wang , Richang Hong

Micro-expressions are spontaneous, rapid and subtle facial movements that can neither be forged nor suppressed. They are very important nonverbal communication clues, but are transient and of low intensity thus difficult to recognize.…

Computer Vision and Pattern Recognition · Computer Science 2023-04-11 Zhijun Zhai , Jianhui Zhao , Chengjiang Long , Wenju Xu , Shuangjiang He , Huijuan Zhao

Multimodal emotion recognition (MER) aims to identify emotional states by integrating and analyzing information from multiple modalities. However, inherent modality heterogeneity and inconsistencies in emotional cues remain key challenges…

Multimedia · Computer Science 2025-08-05 Peiyuan Jiang , Yao Liu , Qiao Liu , Zongshun Zhang , Jiaye Yang , Lu Liu , Daibing Yao

Multimodal Emotion Recognition (MER) aims to automatically identify and understand human emotional states by integrating information from various modalities. However, the scarcity of annotated multimodal data significantly hinders the…

Human-Computer Interaction · Computer Science 2024-09-11 Zhixian Zhao , Haifeng Chen , Xi Li , Dongmei Jiang , Lei Xie

Emotional Intelligence in Human-Computer Interaction has attracted increasing attention from researchers in multidisciplinary research fields including psychology, computer vision, neuroscience, artificial intelligence, and related…

Human-Computer Interaction · Computer Science 2020-02-25 Amine Djerghri , Ahmed Rachid Hazourli , Alice Othmani

Micro-expression recognition can obtain the real emotion of the individual at the current moment. Although deep learning-based methods, especially Transformer-based methods, have achieved impressive results, these methods have high…

Computer Vision and Pattern Recognition · Computer Science 2026-04-10 Junbo Wang , Liangyu Fu , Yuke Li , Yining Zhu , Xuecheng Wu , Kun Hu

Dynamic facial expression recognition (DFER) is an important task in the field of computer vision. To apply automatic DFER in practice, it is necessary to accurately recognize ambiguous facial expressions, which often appear in data in the…

Computer Vision and Pattern Recognition · Computer Science 2025-03-04 Ryosuke Kawamura , Hideaki Hayashi , Noriko Takemura , Hajime Nagahara

Facial Expression Recognition (FER) has consistently been a focal point in the field of facial analysis. In the context of existing methodologies for 3D FER or 2D+3D FER, the extraction of expression features often gets entangled with…

Computer Vision and Pattern Recognition · Computer Science 2024-03-14 Hebeizi Li , Hongyu Yang , Di Huang

Facial expressions are the most common universal forms of body language. In the past few years, automatic facial expression recognition (FER) has been an active field of research. However, it is still a challenging task due to different…

Computer Vision and Pattern Recognition · Computer Science 2021-08-23 Rauf Momin , Ali Shan Momin , Khalid Rasheed , Muhammad Saqib

Facial micro-expressions recognition has attracted much attention recently. Micro-expressions have the characteristics of short duration and low intensity, and it is difficult to train a high-performance classifier with the limited number…

Computer Vision and Pattern Recognition · Computer Science 2022-05-31 Yanxin Song , Jianzong Wang , Tianbo Wu , Zhangcheng Huang , Jing Xiao

Micro-expression recognition plays a pivotal role in understanding hidden emotions and has applications across various fields. Traditional recognition methods assume access to all training data at once, but real-world scenarios involve…

Computer Vision and Pattern Recognition · Computer Science 2026-03-31 Zhengqin Lai , Xiaopeng Hong , Yabin Wang , Xiaobai Li

The performance of a computer vision model depends on the size and quality of its training data. Recent studies have unveiled previously-unknown composition biases in common image datasets which then lead to skewed model outputs, and have…

Computer Vision and Pattern Recognition · Computer Science 2021-08-20 Yunliang Chen , Jungseock Joo

Micro-facial expressions are brief and involuntary facial movements that reflect genuine emotional states. While most prior work focuses on classifying discrete micro-expression categories, far fewer studies address the continuous evolution…

Computer Vision and Pattern Recognition · Computer Science 2025-12-02 Riyadh Mohammed Almushrafy

Understanding human affective behaviour, especially in the dynamics of real-world settings, requires Facial Expression Recognition (FER) models to continuously adapt to individual differences in user expression, contextual attributions, and…

Computer Vision and Pattern Recognition · Computer Science 2023-05-12 Nikhil Churamani , Tolga Dimlioglu , German I. Parisi , Hatice Gunes

Facial Expression Recognition (FER) is crucial in many research domains because it enables machines to better understand human behaviours. FER methods face the problems of relatively small datasets and noisy data that don't allow classical…

Computer Vision and Pattern Recognition · Computer Science 2022-07-01 Jules Bonnard , Arnaud Dapogny , Ferdinand Dhombres , Kévin Bailly