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Animal pose estimation has recently come into the limelight due to its application in biology, zoology, and aquaculture. Deep learning methods have effectively been applied to human pose estimation. However, the major bottleneck to the…

Computer Vision and Pattern Recognition · Computer Science 2021-11-17 Samayan Bhattacharya , Sk Shahnawaz

Sensor-based Human Activity Recognition facilitates unobtrusive monitoring of human movements. However, determining the most effective sensor placement for optimal classification performance remains challenging. This paper introduces a…

Machine Learning · Computer Science 2023-07-07 Orhan Konak , Alexander Wischmann , Robin van de Water , Bert Arnrich

Background: Pain assessment in individuals with neurological conditions, especially those with limited self-report ability and altered facial expressions, presents challenges. Existing measures, relying on direct observation by caregivers,…

Computer Vision and Pattern Recognition · Computer Science 2024-01-23 Álvaro Sabater-Gárriz , F. Xavier Gaya-Morey , José María Buades-Rubio , Cristina Manresa Yee , Pedro Montoya , Inmaculada Riquelme

Human pose analysis has garnered significant attention within both the research community and practical applications, owing to its expanding array of uses, including gaming, video surveillance, sports performance analysis, and…

Computer Vision and Pattern Recognition · Computer Science 2023-10-23 Lijuan Zhou , Xiang Meng , Zhihuan Liu , Mengqi Wu , Zhimin Gao , Pichao Wang

Although pain is frequent in old age, older adults are often undertreated for pain. This is especially the case for long-term care residents with moderate to severe dementia who cannot report their pain because of cognitive impairments that…

Computer Vision and Pattern Recognition · Computer Science 2021-01-12 Siavash Rezaei , Abhishek Moturu , Shun Zhao , Kenneth M. Prkachin , Thomas Hadjistavropoulos , Babak Taati

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

Automatic continuous time, continuous value assessment of a patient's pain from face video is highly sought after by the medical profession. Despite the recent advances in deep learning that attain impressive results in many domains, pain…

Computer Vision and Pattern Recognition · Computer Science 2017-01-18 Joy Egede , Michel Valstar , Brais Martinez

The labeled data required to learn pose estimation for articulated objects is difficult to provide in the desired quantity, realism, density, and accuracy. To address this issue, we develop a method to learn representations, which are very…

Computer Vision and Pattern Recognition · Computer Science 2018-05-24 Georg Poier , David Schinagl , Horst Bischof

Cattle activity is an essential index for monitoring health and welfare of the ruminants. Thus, changes in the livestock behavior are a critical indicator for early detection and prevention of several diseases. Rumination behavior is a…

Computer Vision and Pattern Recognition · Computer Science 2021-01-27 Safa Ayadi , Ahmed ben said , Rateb Jabbar , Chafik Aloulou , Achraf Chabbouh , Ahmed Ben Achballah

Ulcerative colitis (UC) classification, which is an important task for endoscopic diagnosis, involves two main difficulties. First, endoscopic images with the annotation about UC (positive or negative) are usually limited. Second, they show…

Image and Video Processing · Electrical Eng. & Systems 2023-03-03 Shota Harada , Ryoma Bise , Hideaki Hayashi , Kiyohito Tanaka , Seiichi Uchida

For human pose estimation in still images, this paper proposes three semi- and weakly-supervised learning schemes. While recent advances of convolutional neural networks improve human pose estimation using supervised training data, our…

Computer Vision and Pattern Recognition · Computer Science 2019-06-05 Norimichi Ukita , Yusuke Uematsu

Quantification of behavior is critical in applications ranging from neuroscience, veterinary medicine and animal conservation efforts. A common key step for behavioral analysis is first extracting relevant keypoints on animals, known as…

Computer Vision and Pattern Recognition · Computer Science 2025-04-22 Shaokai Ye , Anastasiia Filippova , Jessy Lauer , Steffen Schneider , Maxime Vidal , Tian Qiu , Alexander Mathis , Mackenzie Weygandt Mathis

Pain is a serious worldwide health problem that affects a vast proportion of the population. For efficient pain management and treatment, accurate classification and evaluation of pain severity are necessary. However, this can be…

Machine Learning · Computer Science 2023-12-19 Zhenyuan Lu , Burcu Ozek , Sagar Kamarthi

Human pose estimation aims to locate the human body parts and build human body representation (e.g., body skeleton) from input data such as images and videos. It has drawn increasing attention during the past decade and has been utilized in…

Computer Vision and Pattern Recognition · Computer Science 2023-07-06 Ce Zheng , Wenhan Wu , Chen Chen , Taojiannan Yang , Sijie Zhu , Ju Shen , Nasser Kehtarnavaz , Mubarak Shah

EEG-based analysis of pain perception, enhanced by machine learning, reveals how the brain encodes pain by identifying neural patterns evoked by noxious stimulation. However, a major challenge that remains is the generalization of machine…

Signal Processing · Electrical Eng. & Systems 2025-08-19 Mathis Rezzouk , Fabrice Gagnon , Alyson Champagne , Mathieu Roy , Philippe Albouy , Michel-Pierre Coll , Cem Subakan

Several factors contribute to the appearance of an object in a visual scene, including pose, illumination, and deformation, among others. Each factor accounts for a source of variability in the data, while the multiplicative interactions of…

Computer Vision and Pattern Recognition · Computer Science 2019-02-26 Mengjiao Wang , Zhixin Shu , Shiyang Cheng , Yannis Panagakis , Dimitris Samaras , Stefanos Zafeiriou

Pain is a personal, subjective experience that is commonly evaluated through visual analog scales (VAS). While this is often convenient and useful, automatic pain detection systems can reduce pain score acquisition efforts in large-scale…

Computer Vision and Pattern Recognition · Computer Science 2017-06-27 Daniel Lopez Martinez , Ognjen Rudovic , Rosalind Picard

In recent years, 3D parametric animal models have been developed to aid in estimating 3D shape and pose from images and video. While progress has been made for humans, it's more challenging for animals due to limited annotated data. To…

Computer Vision and Pattern Recognition · Computer Science 2024-11-01 Ci Li , Yi Yang , Zehang Weng , Elin Hernlund , Silvia Zuffi , Hedvig Kjellström

Despite the span in estimating pain from facial expressions, limited works have focused on estimating the sequence-level pain, which is reported by patients and used commonly in clinics. In this paper, we introduce a novel Statistical…

Computer Vision and Pattern Recognition · Computer Science 2025-04-09 Mina Bishay , Graham Page , Mohammad Mavadati

Getting pain intensity from face images is an important problem in autonomous nursing systems. However, due to the limitation in data sources and the subjectiveness in pain intensity values, it is hard to adopt modern deep neural networks…

Computer Vision and Pattern Recognition · Computer Science 2018-11-21 Conghui Li , Zhaocheng Zhu , Yuming Zhao