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The risk of unauthorized remote access of streaming video from networked cameras underlines the need for stronger privacy safeguards. We propose a lens-free coded aperture camera system for human action recognition that is…

Computer Vision and Pattern Recognition · Computer Science 2019-04-18 Zihao W. Wang , Vibhav Vineet , Francesco Pittaluga , Sudipta Sinha , Oliver Cossairt , Sing Bing Kang

Motion sensors integrated into wearable and mobile devices provide valuable information about the device users. Machine learning and, recently, deep learning techniques have been used to characterize sensor data. Mostly, a single task, such…

Machine Learning · Computer Science 2023-11-15 Egemen İşgüder , Özlem Durmaz İncel

Real-time Human Activity Recognition (HAR) has wide-ranging applications in areas such as context-aware environments, public safety, assistive technologies, and autonomous monitoring and surveillance systems. However, existing real-time HAR…

Computer Vision and Pattern Recognition · Computer Science 2026-01-26 Wasi Ullah , Yasir Noman Khalid , Saddam Hussain Khan

Video-based visual relation detection tasks, such as video scene graph generation, play important roles in fine-grained video understanding. However, current video visual relation detection datasets have two main limitations that hinder the…

Computer Vision and Pattern Recognition · Computer Science 2024-04-09 Tao Wu , Runyu He , Gangshan Wu , Limin Wang

Recent advancements in artificial intelligence hold ample potential for monitoring applications using surveillance cameras. However, concerns about privacy and model bias have made it challenging to utilize them in public. Although…

Computer Vision and Pattern Recognition · Computer Science 2026-05-05 Mulugeta Weldezgina Asres , Lei Jiao , Christian Walter Omlin

Video generation has advanced rapidly, improving evaluation methods, yet assessing video's motion remains a major challenge. Specifically, there are two key issues: 1) current motion metrics do not fully align with human perceptions; 2) the…

Computer Vision and Pattern Recognition · Computer Science 2025-03-18 Xinran Ling , Chen Zhu , Meiqi Wu , Hangyu Li , Xiaokun Feng , Cundian Yang , Aiming Hao , Jiashu Zhu , Jiahong Wu , Xiangxiang Chu

Human activity recognition (HAR) is a classification task that aims to classify human activities or predict human behavior by means of features extracted from sensors data. Typical HAR systems use wearable sensors and/or handheld and mobile…

Reliable three-dimensional human pose estimation (3D HPE) remains challenging due to the differences in viewpoints, environments, and camera conventions among datasets. As a result, methods that achieve near-optimal in-dataset accuracy…

Computer Vision and Pattern Recognition · Computer Science 2025-09-23 Saad Manzur , Bryan Vela , Brandon Vela , Aditya Agrawal , Lan-Anh Dang-Vu , David Li , Wayne Hayes

BuddyBench introduces a privacy-constrained multi-task benchmark for pediatric social-communication personalization. Unlike existing neurodevelopmental repositories that primarily emphasize imaging, genetics, or cross-sectional clinical…

Artificial Intelligence · Computer Science 2026-05-28 Jeyeon Eo , Joo Young Kim , Ran Ju , Minyoung Jung , Unggi Lee

Human Activity Recognition has gained significant attention due to its diverse applications, including ambient assisted living and remote sensing. Wearable sensor-based solutions often suffer from user discomfort and reliability issues,…

In the last few years there has been a growing interest in Human Activity Recognition~(HAR) topic. Sensor-based HAR approaches, in particular, has been gaining more popularity owing to their privacy preserving nature. Furthermore, due to…

Machine Learning · Computer Science 2019-03-13 Parviz Asghari , Elnaz Soelimani , Ehsan Nazerfard

Human activity recognition (HAR) from on-body sensors is a core functionality in many AI applications: from personal health, through sports and wellness to Industry 4.0. A key problem holding up progress in wearable sensor-based HAR,…

Signal Processing · Electrical Eng. & Systems 2024-05-21 Si Zuo , Vitor Fortes Rey , Sungho Suh , Stephan Sigg , Paul Lukowicz

With the advancement of deep neural networks and computer vision-based Human Activity Recognition, employment of Point-Cloud Data technologies (LiDAR, mmWave) has seen a lot interests due to its privacy preserving nature. Given the high…

Computer Vision and Pattern Recognition · Computer Science 2022-12-06 Mohammad Arif Ul Alam , Md Mahmudur Rahman , Jared Q Widberg

Human action recognition (HAR) in videos is one of the core tasks of video understanding. Based on video sequences, the goal is to recognize actions performed by humans. While HAR has received much attention in the visible spectrum, action…

Computer Vision and Pattern Recognition · Computer Science 2022-04-20 Soufiane Lamghari , Guillaume-Alexandre Bilodeau , Nicolas Saunier

Reliable facial expression recognition plays a critical role in human-machine interactions. However, most of the facial expression analysis methodologies proposed to date pay little or no attention to the protection of a user's privacy. In…

Computer Vision and Pattern Recognition · Computer Science 2018-09-10 Jiawei Chen , Janusz Konrad , Prakash Ishwar

Foundation models (FMs) are large neural networks trained on broad datasets, excelling in downstream tasks with minimal fine-tuning. Human activity recognition in video has advanced with FMs, driven by competition among different…

Computer Vision and Pattern Recognition · Computer Science 2024-07-23 Thinesh Thiyakesan Ponbagavathi , Kunyu Peng , Alina Roitberg

This paper takes initial strides at designing and evaluating a vision-based system for privacy ensured activity monitoring. The proposed technology utilizing Artificial Intelligence (AI)-empowered proactive systems offering continuous…

Computer Vision and Pattern Recognition · Computer Science 2021-02-09 Anbumalar Saravanan , Justin Sanchez , Hassan Ghasemzadeh , Aurelia Macabasco-O'Connell , Hamed Tabkhi

Traditional approaches to differential privacy assume a fixed privacy requirement $\epsilon$ for a computation, and attempt to maximize the accuracy of the computation subject to the privacy constraint. As differential privacy is…

Machine Learning · Computer Science 2017-06-01 Katrina Ligett , Seth Neel , Aaron Roth , Bo Waggoner , Z. Steven Wu

The surge in multimodal AI's success has sparked concerns over data privacy in vision-and-language tasks. While CLIP has revolutionized multimodal learning through joint training on images and text, its potential to unintentionally disclose…

Machine Learning · Computer Science 2024-03-04 Alyssa Huang , Peihan Liu , Ryumei Nakada , Linjun Zhang , Wanrong Zhang

Deep generative models are often trained on sensitive data, such as genetic sequences, health data, or more broadly, any copyrighted, licensed or protected content. This raises critical concerns around privacy-preserving synthetic data, and…

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