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Micro-actions are subtle, localized movements lasting 1-3 seconds such as scratching one's head or tapping fingers. Such subtle actions are essential for social communication, ubiquitously used in natural interactions, and thus critical for…

Computer Vision and Pattern Recognition · Computer Science 2026-04-24 Naga VS Raviteja Chappa , Evangelos Sariyanidi , Lisa Yankowitz , Gokul Nair , Casey J. Zampella , Robert T. Schultz , Birkan Tunç

In this study, the Multivariate Empirical Mode Decomposition (MEMD) is applied to multichannel EEG to obtain scale-aligned intrinsic mode functions (IMFs) as input features for emotion detection. The IMFs capture local signal variation…

Signal Processing · Electrical Eng. & Systems 2022-06-03 Monira Islam , Tan Lee

Automatic recognition of the quality of movement in human beings is a challenging task, given the difficulty both in defining the constraints that make a movement correct, and the difficulty in using noisy data to determine if these…

Human-Computer Interaction · Computer Science 2016-02-12 Carlos Palma , Augusto Salazar , Francisco Vargas

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

Gestures are an integral part of our daily interactions with the environment. Hand gesture recognition (HGR) is the process of interpreting human intent through various input modalities, such as visual data (images and videos) and…

Human-Computer Interaction · Computer Science 2025-12-10 Soroush Baghernezhad , Elaheh Mohammadreza , Vinicius Prado da Fonseca , Ting Zou , Xianta Jiang

Gait recognition is widely used in diversified practical applications. Currently, the most prevalent approach is to recognize human gait from RGB images, owing to the progress of computer vision technologies. Nevertheless, the perception…

Computer Vision and Pattern Recognition · Computer Science 2022-11-02 Yanyan Huang , Yong Wang , Kun Shi , Chaojie Gu , Yu Fu , Cheng Zhuo , Zhiguo Shi

EMG-based hand gesture recognition uses electromyographic~(EMG) signals to interpret and classify hand movements by analyzing electrical activity generated by muscle contractions. It has wide applications in prosthesis control,…

Machine Learning · Computer Science 2024-11-26 Parshuram N. Aarotale , Ajita Rattani

Existing techniques for 3D action recognition are sensitive to viewpoint variations because they extract features from depth images which change significantly with viewpoint. In contrast, we directly process the pointclouds and propose a…

Computer Vision and Pattern Recognition · Computer Science 2014-09-23 Hossein Rahmani , Arif Mahmood , Du Q. Huynh , Ajmal Mian

One of the most arduous and captivating domains under image processing is handwritten character recognition. In this paper we have proposed a feature extraction technique which is a combination of unique features of geometric, zone-based…

Computer Vision and Pattern Recognition · Computer Science 2020-01-14 Sai Abhishikth Ayyadevara , P N V Sai Ram Teja , Bharath K P , Rajesh Kumar M

Facial micro-expressions, characterized by their subtle and brief nature, are valuable indicators of genuine emotions. Despite their significance in psychology, security, and behavioral analysis, micro-expression recognition remains…

Computer Vision and Pattern Recognition · Computer Science 2025-10-16 Luu Tu Nguyen , Vu Tram Anh Khuong , Thi Bich Phuong Man , Thi Duyen Ngo , Thanh Ha Le

The multichannel electrode array used for electromyogram (EMG) pattern recognition provides good performance, but it has a high cost, is computationally expensive, and is inconvenient to wear. Therefore, researchers try to use as few…

Signal Processing · Electrical Eng. & Systems 2022-05-24 Md. Johirul Islam , Shamim Ahmad , Fahmida Haque , Mamun Bin Ibne Reaz , Mohammad A. S. Bhuiyan , Md. Rezaul Islam

Studies in the area of neuroscience have revealed the relationship between emotional patterns and brain functional regions, demonstrating that dynamic relationships between different brain regions are an essential factor affecting emotion…

Computer Vision and Pattern Recognition · Computer Science 2021-12-17 Yijin Zhou , Fu Li , Yang Li , Youshuo Ji , Guangming Shi , Wenming Zheng , Lijian Zhang , Yuanfang Chen , Rui Cheng

BACKGROUND: Learning to perform new movements is usually achieved by following visual demonstrations. Haptic guidance by a force feedback device is a recent and original technology which provides additional proprioceptive cues during…

Medical Physics · Physics 2008-12-18 Jérémy Bluteau , Sabine Coquillart , Yohan Payan , Edouard Gentaz

Humans modify their facial expressions in order to communicate their internal states and sometimes to mislead observers regarding their true emotional states. Evidence in experimental psychology shows that discriminative facial responses…

Computer Vision and Pattern Recognition · Computer Science 2018-01-10 Kaustubh Kulkarni , Ciprian Adrian Corneanu , Ikechukwu Ofodile , Sergio Escalera , Xavier Baro , Sylwia Hyniewska , Juri Allik , Gholamreza Anbarjafari

Micro expression recognition (MER) is crucial for inferring genuine emotion. Applying a multimodal large language model (MLLM) to this task enables spatio-temporal analysis of facial motion and provides interpretable descriptions. However,…

Computer Vision and Pattern Recognition · Computer Science 2025-11-17 Ren Zhang , Huilai Li , Chao qi , Guoliang Xu , Tianyu Zhou , Wei wei , Jianqin Yin

Negative emotions are linked to the onset of neurodegenerative diseases and dementia, yet they are often difficult to detect through observation. Physiological signals from wearable devices offer a promising noninvasive method for…

Human-Computer Interaction · Computer Science 2025-10-28 Muhammad Irfan , Anum Nawaz , Ayse Kosal Bulbul , Riku Klen , Abdulhamit Subasi , Tomi Westerlund , Wei Chen

Psychological studies indicate that emotional states are expressed in the way people walk and the human gait is investigated in terms of its ability to reveal a person's emotional state. And Microsoft Kinect is a rapidly developing,…

Computers and Society · Computer Science 2015-08-05 Shun Li , Changye Zhu , Liqing Cui , Nan Zhao , Baobin Li , Tingshao Zhu

Electromyography (EMG) is a way of measuring the bioelectric activities that take place inside the muscles. EMG is usually performed to detect abnormalities within the nerves or muscles of a target area. The recent developments in the field…

Computer Vision and Pattern Recognition · Computer Science 2021-01-19 Niloy Sikder , Abu Shamim Mohammad Arif , Abdullah-Al Nahid

Use of the electroencephalogram (EEG) and machine learning approaches to recognize emotions can facilitate affective human computer interactions. However, the type of EEG data constitutes an obstacle for cross-individual EEG feature…

Machine Learning · Computer Science 2021-05-26 Xiaolong Zhong , Zhong Yin

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