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In this paper, we study multi-label atomic activity recognition. Despite the notable progress in action recognition, it is still challenging to recognize atomic activities due to a deficiency in a holistic understanding of both multiple…

Computer Vision and Pattern Recognition · Computer Science 2024-04-23 Chi-Hsi Kung , Shu-Wei Lu , Yi-Hsuan Tsai , Yi-Ting Chen

For speech interaction, voice activity detection (VAD) is often used as a front-end. However, traditional VAD algorithms usually need to wait for a continuous tail silence to reach a preset maximum duration before segmentation, resulting in…

Audio and Speech Processing · Electrical Eng. & Systems 2023-05-23 Mohan Shi , Yuchun Shu , Lingyun Zuo , Qian Chen , Shiliang Zhang , Jie Zhang , Li-Rong Dai

Wearable sensor devices, which offer the advantage of recording daily objects used by a person while performing an activity, enable the feasibility of unsupervised Human Activity Recognition (HAR). Unfortunately, previous unsupervised…

Human-Computer Interaction · Computer Science 2023-06-12 Qingxin Xia , Takuya Maekawa , Takahiro Hara

Sensor-based human activity recognition has become a critical component of many emerging applications ranging from behavioral medicine to gaming. However, an unprecedented increase in the diversity of sensor devices in the…

Machine Learning · Computer Science 2020-03-18 Parastoo Alinia , Iman Mirzadeh , Hassan Ghasemzadeh

Surgical phase recognition is a basic component for different context-aware applications in computer- and robot-assisted surgery. In recent years, several methods for automatic surgical phase recognition have been proposed, showing…

Computer Vision and Pattern Recognition · Computer Science 2023-05-24 Isabel Funke , Dominik Rivoir , Stefanie Speidel

Laparoscopic surgery constrains surgeons spatial awareness because procedures are performed through a monocular, two-dimensional (2D) endoscopic view. Conventional training methods using dry-lab models or recorded videos provide limited…

Human-Computer Interaction · Computer Science 2025-11-05 Songyang Liu , Yunpeng Tan , Shuai Li

Human activity recognition using smart home sensors is one of the bases of ubiquitous computing in smart environments and a topic undergoing intense research in the field of ambient assisted living. The increasingly large amount of data…

Neural and Evolutionary Computing · Computer Science 2018-04-20 Deepika Singh , Erinc Merdivan , Ismini Psychoula , Johannes Kropf , Sten Hanke , Matthieu Geist , Andreas Holzinger

Radar-based human activity recognition has gained attention as a privacy-preserving alternative to vision and wearable sensors, especially in sensitive environments like long-term care facilities. Micro-Doppler spectrograms derived from…

Image and Video Processing · Electrical Eng. & Systems 2026-02-25 Huy Trinh , Davis Liu , Munia Humaira , Peter Lee , Zhou Wang

Automatic recognition of fine-grained surgical activities, called steps, is a challenging but crucial task for intelligent intra-operative computer assistance. The development of current vision-based activity recognition methods relies…

Computer Vision and Pattern Recognition · Computer Science 2023-04-12 Sanat Ramesh , Diego Dall'Alba , Cristians Gonzalez , Tong Yu , Pietro Mascagni , Didier Mutter , Jacques Marescaux , Paolo Fiorini , Nicolas Padoy

The development of effective training and evaluation strategies is critical. Conventional methods for assessing surgical proficiency typically rely on expert supervision, either through onsite observation or retrospective analysis of…

Computer Vision and Pattern Recognition · Computer Science 2026-01-01 Yan Meng , Daniel A. Donoho , Marcelle Altshuler , Omar Arnaout

Objectives Computer vision (CV) is a field of artificial intelligence that enables machines to interpret and understand images and videos. CV has the potential to be of assistance in the operating room (OR) to track surgical instruments. We…

Long Short Term Memory LSTM-based structures have demonstrated their efficiency for daily living recognition activities in smart homes by capturing the order of sensor activations and their temporal dependencies. Nevertheless, they still…

Machine Learning · Computer Science 2021-11-25 Damien Bouchabou , Sao Mai Nguyen , Christophe Lohr , Benoit Leduc , Ioannis Kanellos

To support the modern machine-type communications, a crucial task during the random access phase is device activity detection, which is to detect the active devices from a large number of potential devices based on the received signal at…

Information Theory · Computer Science 2021-12-21 Yang Li , Zhilin Chen , Yunqi Wang , Chenyang Yang , Yik-Chung Wu

In the human activity recognition research area, prior studies predominantly concentrate on leveraging advanced algorithms on public datasets to enhance recognition performance, little attention has been paid to executing real-time kitchen…

Signal Processing · Electrical Eng. & Systems 2024-09-11 Mengxi Liu , Sungho Suh , Juan Felipe Vargas , Bo Zhou , Agnes Grünerbl , Paul Lukowicz

To develop intelligent speech assistants and integrate them seamlessly with intra-operative decision-support frameworks, accurate and efficient surgical phase recognition is a prerequisite. In this study, we propose a multimodal framework…

Audio and Speech Processing · Electrical Eng. & Systems 2024-06-24 Kubilay Can Demir , Belen Lojo Rodriguez , Tobias Weise , Andreas Maier , Seung Hee Yang

Detection, tracking, and pose estimation of surgical instruments are crucial tasks for computer assistance during minimally invasive robotic surgery. In the majority of cases, the first step is the automatic segmentation of surgical tools.…

Computer Vision and Pattern Recognition · Computer Science 2017-03-28 Daniil Pakhomov , Vittal Premachandran , Max Allan , Mahdi Azizian , Nassir Navab

Prior work has primarily formulated CA-HAR as a multi-label classification problem, where model inputs are time-series sensor data and target labels are binary encodings representing whether a given activity or context occurs. These CA-HAR…

Machine Learning · Computer Science 2025-04-11 Wen Ge , Guanyi Mou , Emmanuel O. Agu , Kyumin Lee

Surgery is a high-stakes domain where surgeons must navigate critical anatomical structures and actively avoid potential complications while achieving the main task at hand. Such surgical activity has been shown to affect long-term patient…

Skeleton-based human action recognition aims to classify human skeletal sequences, which are spatiotemporal representations of actions, into predefined categories. To reduce the reliance on costly annotations of skeletal sequences while…

Computer Vision and Pattern Recognition · Computer Science 2025-10-30 Zhigang Tu , Zhengbo Zhang , Jia Gong , Junsong Yuan , Bo Du

Word-level sign language recognition (WSLR) has attracted attention because it is expected to overcome the communication barrier between people with speech impairment and those who can hear. In the WSLR problem, a method designed for action…

Computer Vision and Pattern Recognition · Computer Science 2024-11-21 Mizuki Maruyama , Shrey Singh , Katsufumi Inoue , Partha Pratim Roy , Masakazu Iwamura , Michifumi Yoshioka