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This paper presents a method for continuous indoor-outdoor environment detection on mobile devices based solely on WiFi fingerprints. Detection of indoor outdoor switching is an important part of identifying a user's context, and it…

信号处理 · 电气工程与系统科学 2019-08-05 Guy Shtar , Bracha Shapira , Lior Rokach

Automatic detection of students' engagement in online learning settings is a key element to improve the quality of learning and to deliver personalized learning materials to them. Varying levels of engagement exhibited by students in an…

计算机视觉与模式识别 · 计算机科学 2021-10-19 Ali Abedi , Shehroz S. Khan

With the rising number of interconnected devices and sensors, modeling distributed sensor networks is of increasing interest. Recurrent neural networks (RNN) are considered particularly well suited for modeling sensory and streaming data.…

机器学习 · 计算机科学 2017-11-15 Stephan Baier , Sigurd Spieckermann , Volker Tresp

Human behavior recognition has been considered as a core technology that can facilitate variety of applications. However, accurate detection and recognition of human behavior is still a big challenge that attracts a lot of research efforts.…

人机交互 · 计算机科学 2017-12-04 Zhu Wang , Bin Guo , Zhiwen Yu , Xingshe Zhou

We propose a drone signal out-of-distribution detection (OODD) algorithm based on the cognitive fusion of Zadoff-Chu (ZC) sequences and time-frequency images (TFI). ZC sequences are identified by analyzing the communication protocols of DJI…

机器学习 · 计算机科学 2026-01-27 Jie Li , Jing Li , Lu Lv , Zhanyu Ju , Fengkui Gong

While diffusion models have set a new benchmark for quality in Low-Dose Computed Tomography (LDCT) denoising, their clinical adoption is critically hindered by extreme computational costs, with inference times often exceeding thousands of…

计算机视觉与模式识别 · 计算机科学 2025-09-30 Tangtangfang Fang , Jingxi Hu , Xiangjian He , Jiaqi Yang

The number of wireless devices is drastically increasing, resulting in many devices contending for radio resources. In this work, we present an algorithm to detect active devices for unsourced random access, i.e., the devices are…

信息论 · 计算机科学 2023-01-13 Gilles Callebaut , François Rottenberg , Liesbet Van der Perre , Erik G. Larsson

Unintentional or accidental falls are one of the significant health issues in senior persons. The population of senior persons is increasing steadily. So, there is a need for an automated fall detection monitoring system. This paper…

计算机视觉与模式识别 · 计算机科学 2025-06-05 Ekram Alam , Abu Sufian , Paramartha Dutta , Marco Leo

From the viewpoint of physical-layer authentication, spoofing attacks can be foiled by checking channel state information (CSI). Existing CSI-based authentication algorithms mostly require a deep knowledge of the channel to deliver decent…

机器学习 · 计算机科学 2018-07-26 Qian Wang , Hang Li , Zhi Chen , Dou Zhao , Shuang Ye , Jiansheng Cai

This paper presents a method that can accurately detect heads especially small heads under the indoor scene. To achieve this, we propose a novel method, Feature Refine Net (FRN), and a cascaded multi-scale architecture. FRN exploits the…

计算机视觉与模式识别 · 计算机科学 2018-11-27 Dezhi Peng , Zikai Sun , Zirong Chen , Zirui Cai , Lele Xie , Lianwen Jin

Wi-Fi sensing systems are severely hindered by domain shifts when deployed in unseen real-world environments. While existing methods attempt to tackle this through Unsupervised Domain Adaptation (UDA) or Domain Generalization (DG), they…

机器学习 · 计算机科学 2026-03-16 Ke Xu , Zhiyong Zheng , Hongyuan Zhu , Lei Wang , Jiangtao Wang

The rapid development of Wi-Fi technologies in recent years has caused a significant increase in the traffic usage. Hence, knowledge obtained from Wi-Fi network measurements can be helpful for a more efficient network management. In this…

网络与互联网体系结构 · 计算机科学 2024-08-20 Seyedeh Soheila Shaabanzadeh , Juan Sánchez-González

Fine-grained person perception such as body segmentation and pose estimation has been achieved with many 2D and 3D sensors such as RGB/depth cameras, radars (e.g., RF-Pose) and LiDARs. These sensors capture 2D pixels or 3D point clouds of…

计算机视觉与模式识别 · 计算机科学 2019-04-02 Fei Wang , Sanping Zhou , Stanislav Panev , Jinsong Han , Dong Huang

Pedestrian detection is an essential task in autonomous driving research. In addition to typical color images, thermal images benefit the detection in dark environments. Hence, it is worthwhile to explore an integrated approach to take…

计算机视觉与模式识别 · 计算机科学 2019-03-25 Yang Zheng , Izzat H. Izzat , Shahrzad Ziaee

Change detection (CD) in remote sensing imagery is a crucial task with applications in environmental monitoring, urban development, and disaster management. CD involves utilizing bi-temporal images to identify changes over time. The…

计算机视觉与模式识别 · 计算机科学 2024-06-28 Hongjia Chen , Xin Xu , Fangling Pu

Multi-grained features extracted from convolutional neural networks (CNNs) have demonstrated their strong discrimination ability in supervised person re-identification (Re-ID) tasks. Inspired by them, this work investigates the way of…

计算机视觉与模式识别 · 计算机科学 2022-11-23 Jiachen Li , Menglin Wang , Xiaojin Gong

Person Re-identification (ReID) is to identify the same person across different cameras. It is a challenging task due to the large variations in person pose, occlusion, background clutter, etc How to extract powerful features is a…

计算机视觉与模式识别 · 计算机科学 2017-10-19 Dangwei Li , Xiaotang Chen , Zhang Zhang , Kaiqi Huang

Robust face detection in the wild is one of the ultimate components to support various facial related problems, i.e. unconstrained face recognition, facial periocular recognition, facial landmarking and pose estimation, facial expression…

计算机视觉与模式识别 · 计算机科学 2016-06-20 Chenchen Zhu , Yutong Zheng , Khoa Luu , Marios Savvides

The way to accurately and effectively identify people has always been an interesting topic in research and industry. With the rapid development of artificial intelligence in recent years, facial recognition gains lots of attention due to…

计算机视觉与模式识别 · 计算机科学 2018-11-20 Yang Li , Sangwhan Cha

Quasi-static human activities such as lying, standing or sitting produce very low Doppler shifts and highly spread radar signatures, making them difficult to detect with conventional constant-false-alarm rate (CFAR) detectors tuned for…

信号处理 · 电气工程与系统科学 2026-02-17 Huy Trinh , George Shaker