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Successful training of convolutional neural networks is often associated with sufficiently deep architectures composed of high amounts of features. These networks typically rely on a variety of regularization and pruning techniques to…

Computer Vision and Pattern Recognition · Computer Science 2017-10-23 Martin Mundt , Tobias Weis , Kishore Konda , Visvanathan Ramesh

Automated Facial Expression Recognition (FER) has been a challenging task for decades. Many of the existing works use hand-crafted features such as LBP, HOG, LPQ, and Histogram of Optical Flow (HOF) combined with classifiers such as Support…

Computer Vision and Pattern Recognition · Computer Science 2020-04-17 Behzad Hasani , Mohammad H. Mahoor

Parametric factor copula models typically work well in modeling multivariate dependencies due to their flexibility and ability to capture complex dependency structures. However, accurately estimating the linking copulas within these models…

Methodology · Statistics 2025-10-22 Bahareh Ghanbari , Pavel Krupskiy , Laleh Tafakori , Yan Wang

Automatic facial expression recognition is an important research area in the emotion recognition and computer vision. Applications can be found in several domains such as medical treatment, driver fatigue surveillance, sociable robotics,…

Computer Vision and Pattern Recognition · Computer Science 2020-02-03 Sevegni Odilon Clement Allognon , Alessandro L. Koerich , Alceu de S. Britto

Emotion recognition (ER) from facial images is one of the landmark tasks in affective computing with major developments in the last decade. Initial efforts on ER relied on handcrafted features that were used to characterize facial images…

Computer Vision and Pattern Recognition · Computer Science 2021-09-09 Fernanda Hernández-Luquin , Hugo Jair Escalante

Analysing coronary artery plaque segments with respect to their functional significance and therefore their influence to patient management in a non-invasive setup is an important subject of current research. In this work we compare and…

Image and Video Processing · Electrical Eng. & Systems 2019-12-16 Felix Denzinger , Michael Wels , Katharina Breininger , Anika Reidelshöfer , Joachim Eckert , Michael Sühling , Axel Schmermund , Andreas Maier

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

There are relatively few works dealing with conformal prediction for multi-task learning issues, and this is particularly true for multi-target regression. This paper focuses on the problem of providing valid (i.e., frequency calibrated)…

Machine Learning · Computer Science 2021-01-29 Soundouss Messoudi , Sébastien Destercke , Sylvain Rousseau

Algorithmic detection of facial palsy offers the potential to improve current practices, which usually involve labor-intensive and subjective assessment by clinicians. In this paper, we present a multimodal fusion-based deep learning model…

Computer Vision and Pattern Recognition · Computer Science 2025-03-14 Heng Yim Nicole Oo , Min Hun Lee , Jeong Hoon Lim

Facial action unit (AU) recognition is a crucial task for facial expressions analysis and has attracted extensive attention in the field of artificial intelligence and computer vision. Existing works have either focused on designing or…

Computer Vision and Pattern Recognition · Computer Science 2019-04-23 Guanbin Li , Xin Zhu , Yirui Zeng , Qing Wang , Liang Lin

Expressing and identifying emotions through facial and physical expressions is a significant part of social interaction. Emotion recognition is an essential task in computer vision due to its various applications and mainly for allowing a…

Computer Vision and Pattern Recognition · Computer Science 2021-12-15 Willams Costa , David Macêdo , Cleber Zanchettin , Lucas S. Figueiredo , Veronica Teichrieb

With the development of deep learning, the structure of convolution neural network is becoming more and more complex and the performance of object recognition is getting better. However, the classification mechanism of convolution neural…

Computer Vision and Pattern Recognition · Computer Science 2019-10-22 Yongpei Zhu , Hongwei Fan , Kehong Yuan

Automatically understanding and recognising human affective states using images and computer vision can improve human-computer and human-robot interaction. However, privacy has become an issue of great concern, as the identities of people…

Computer Vision and Pattern Recognition · Computer Science 2021-11-16 Jimiama M. Mase , Natalie Leesakul , Fan Yang , Grazziela P. Figueredo , Mercedes Torres Torres

In this work we are interested in identifying clusters of "positional equivalent" actors, i.e. actors who play a similar role in a system. In particular, we analyze weighted bipartite networks that describes the relationships between actors…

Data Analysis, Statistics and Probability · Physics 2015-06-19 Alessandro Chessa , Irene Crimaldi , Massimo Riccaboni , Luca Trapin

The ability to recognize facial expressions automatically enables novel applications in human-computer interaction and other areas. Consequently, there has been active research in this field, with several recent works utilizing…

Computer Vision and Pattern Recognition · Computer Science 2016-12-12 Christopher Pramerdorfer , Martin Kampel

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

As artificial intelligence (AI) systems become increasingly embedded in our daily life, the ability to recognize and adapt to human emotions is essential for effective human-computer interaction. Facial expression recognition (FER) provides…

Computer Vision and Pattern Recognition · Computer Science 2025-12-16 Thibault Geoffroy , Myriam Maumy , Lionel Prevost

In the recent past, algorithms based on Convolutional Neural Networks (CNNs) have achieved significant milestones in object recognition. With large examples of each object class, standard datasets train well for inter-class variability.…

Computer Vision and Pattern Recognition · Computer Science 2018-06-11 Shrinivasan Sankar , Adrien Bartoli

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

Facial expressions play an important role in conveying the emotional states of human beings. Recently, deep learning approaches have been applied to image recognition field due to the discriminative power of Convolutional Neural Network…

Computer Vision and Pattern Recognition · Computer Science 2018-07-30 Yingruo Fan , Jacqueline C. K. Lam , Victor O. K. Li