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We propose a system that estimates people's body and head orientations using low-resolution point cloud data from two LiDAR sensors. Our models make accurate estimations in real-world conversation settings where subjects move naturally with…

Computer Vision and Pattern Recognition · Computer Science 2024-10-02 Onur N. Tepencelik , Wenchuan Wei , Pamela C. Cosman , Sujit Dey

Modern advanced driver-assistance systems analyze the driving performance to gather information about the driver's state. Such systems are able, for example, to detect signs of drowsiness by evaluating the steering or lane keeping behavior…

Computer Vision and Pattern Recognition · Computer Science 2020-09-29 Mariella Dreissig , Mohamed Hedi Baccour , Tim Schaeck , Enkelejda Kasneci

Understanding driver activity is vital for in-vehicle systems that aim to reduce the incidence of car accidents rooted in cognitive distraction. Automating real-time behavior recognition while ensuring actions classification with high…

Computer Vision and Pattern Recognition · Computer Science 2021-02-23 Chaoyun Zhang , Rui Li , Woojin Kim , Daesub Yoon , Paul Patras

The performance of CBIR algorithms is usually measured on an isolated workstation. In a real-world environment the algorithms would only constitute a minor component among the many interacting components. The Internet dramati-cally changes…

Information Retrieval · Computer Science 2015-06-25 Neil J. Gunther , Giordano B. Beretta

Alcohol consumption is a significant public health concern and a major cause of accidents and fatalities worldwide. This study introduces a novel video-based facial sequence analysis approach dedicated to the detection of alcohol…

Computer Vision and Pattern Recognition · Computer Science 2025-12-05 Bita Baroutian , Atefe Aghaei , Mohsen Ebrahimi Moghaddam

Functional ultrasound imaging (fUSI) is a cutting-edge technology that measures changes in cerebral blood volume (CBV) by detecting backscattered echoes from red blood cells moving within its field of view (FOV). It offers high…

Neurons and Cognition · Quantitative Biology 2025-08-20 Jared Deighton , Shan Zhong , Kofi Agyeman , Wooseong Choi , Charles Liu , Darrin Lee , Vasileios Maroulas , Vasileios Christopoulos

Augmented and virtual reality is being deployed in different fields of applications. Such applications might involve accessing or processing critical and sensitive information, which requires strict and continuous access control. Given that…

Computer Vision and Pattern Recognition · Computer Science 2020-10-23 Fadi Boutros , Naser Damer , Kiran Raja , Raghavendra Ramachandra , Florian Kirchbuchner , Arjan Kuijper

Addressing the issues of severe noise and high frequency structural degradation in visible images under low-light conditions, this paper proposes a Near Infrared (NIR) aided low light image restoration method based on Frequency Decoupled…

Computer Vision and Pattern Recognition · Computer Science 2026-04-21 Ligen Shi , Zengyu Pang , Chang Liu , Shuchen Sun , Jun Qiu

The field of neuroimaging has truly become data rich, and novel analytical methods capable of gleaning meaningful information from large stores of imaging data are in high demand. Those methods that might also be applicable on the level of…

The massive availability of cameras results in a wide variability of imaging conditions, producing large intra-class variations and a significant performance drop if heterogeneous images are compared for person recognition. However, as…

Computer Vision and Pattern Recognition · Computer Science 2022-03-31 Fernando Alonso-Fernandez , Kiran B. Raja , R. Raghavendra , Cristoph Busch , Josef Bigun , Ruben Vera-Rodriguez , Julian Fierrez

Many surveillance cameras switch between daytime and nighttime modes based on illuminance levels. During the day, the camera records ordinary RGB images through an enabled IR-cut filter. At night, the filter is disabled to capture…

Computer Vision and Pattern Recognition · Computer Science 2024-12-19 Muyao Niu , Zhuoxiao Li , Yifan Zhan , Huy H. Nguyen , Isao Echizen , Yinqiang Zheng

Activity recognition using built-in sensors in smart and wearable devices provides great opportunities to understand and detect human behavior in the wild and gives a more holistic view of individuals' health and well being. Numerous…

Signal Processing · Electrical Eng. & Systems 2020-11-16 Mehrdad Fazli , Kamran Kowsari , Erfaneh Gharavi , Laura Barnes , Afsaneh Doryab

The alertness level of drivers can be estimated with the use of computer vision based methods. The level of fatigue can be found from the value of PERCLOS. It is the ratio of closed eye frames to the total frames processed. The main…

Computer Vision and Pattern Recognition · Computer Science 2015-05-25 Anjith George , Aurobinda Routray

Estimating a child's age from ocular biometric images is challenging due to subtle physiological changes and the limited availability of longitudinal datasets. Although most biometric age estimation studies have focused on facial features…

Image and Video Processing · Electrical Eng. & Systems 2025-05-09 Naveenkumar G Venkataswamy , Poorna Ravi , Stephanie Schuckers , Masudul H. Imtiaz

Operators experience complicated physiological and psychological states when exposed to extreme heat stress, which can impair cognitive function and decrease performance significantly, ultimately leading to severe secondary disasters.…

Human-Computer Interaction · Computer Science 2024-04-04 Yan Zhang , Ming Jia , Meng Li , JianYu Wang , XiangMin Hu , ZhiHui Xu , Tao Chen

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

Human pose estimation, the process of identifying joint positions in a person's body from images or videos, represents a widely utilized technology across diverse fields, including healthcare. One such healthcare application involves in-bed…

Computer Vision and Pattern Recognition · Computer Science 2024-02-02 Ziya Ata Yazıcı , Sara Colantonio , Hazım Kemal Ekenel

The human brain provides a range of functions such as expressing emotions, controlling the rate of breathing, etc., and its study has attracted the interest of scientists for many years. As machine learning models become more sophisticated,…

Human-Computer Interaction · Computer Science 2020-05-25 Felix G. Hamza-Lup , Adytia Suri , Ionut E. Iacob , Ioana R. Goldbach , Lateef Rasheed , Paul N. Borza

Unhealthy behaviors, e.g., physical inactivity and unhealthful food choice, are the primary healthcare cost drivers in developed countries. Pervasive computational, sensing, and communication technology provided by smartphones and…

Machine Learning · Computer Science 2021-01-29 Arash Mahyari , Peter Pirolli

Recent developments in hardware, computer graphics, and AI may soon enable AR/VR head-mounted displays (HMDs) to become everyday devices like smartphones and tablets. Eye trackers within HMDs provide a special opportunity for such setups as…

Computer Vision and Pattern Recognition · Computer Science 2025-07-17 Mengdi Wang , Efe Bozkir , Enkelejda Kasneci
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