Search Results for author: Hansi Liu

Found 5 papers, 3 papers with code

ViFiT: Reconstructing Vision Trajectories from IMU and Wi-Fi Fine Time Measurements

1 code implementation MobiCom ISACom 2023 Bryan Bo Cao, Abrar Alali, Hansi Liu, Nicholas Meegan, Marco Gruteser, Kristin Dana, Ashwin Ashok, Shubham Jain

Tracking subjects in videos is one of the most widely used functions in camera-based IoT applications such as security surveillance, smart city traffic safety enhancement, vehicle to pedestrian communication and so on.

ViFi-Loc: Multi-modal Pedestrian Localization using GAN with Camera-Phone Correspondences

no code implementations22 Nov 2022 Hansi Liu, Kristin Dana, Marco Gruteser, HongSheng Lu

During inference, it generates refined position estimations based only on pedestrians' phone data that consists of GPS, IMU and FTM.

Generative Adversarial Network Self-Learning +1

ViFiCon: Vision and Wireless Association Via Self-Supervised Contrastive Learning

no code implementations11 Oct 2022 Nicholas Meegan, Hansi Liu, Bryan Cao, Abrar Alali, Kristin Dana, Marco Gruteser, Shubham Jain, Ashwin Ashok

We introduce ViFiCon, a self-supervised contrastive learning scheme which uses synchronized information across vision and wireless modalities to perform cross-modal association.

Contrastive Learning Region Proposal

Vi-Fi: Associating Moving Subjects across Vision and Wireless Sensors

1 code implementation ACM/IEEE International Conference on Information Processing in Sensor Networks (IPSN) 2022 Hansi Liu, Abrar Alali, Mohamed Ibrahim, Bryan Bo Cao, Nicholas Meegan, Hongyu Li, Marco Gruteser, Shubham Jain, Kristin Dana, Ashwin Ashok, Bin Cheng, HongSheng Lu

In this paper, we present Vi-Fi, a multi-modal system that leverages a user’s smartphone WiFi Fine Timing Measurements (FTM) and inertial measurement unit (IMU) sensor data to associate the user detected on a camera footage with their corresponding smartphone identifier (e. g. WiFi MAC address).

Graph Matching Multimodal Association

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