WhoFi: Deep Person Re-Identification via Wi-Fi Channel Signal Encoding
2025/07/17 by Danilo Avola, Emad Emam, Avola, Danilo +7 · 12 voices
Engineering · Computer Science · #Indoor and Outdoor Localization Technologies #Video Surveillance and Tracking Methods #Gait Recognition and Analysis
paper · pdf · doi:10.48550/arxiv.2507.12869
Abstract
Person Re-Identification is a key and challenging task in video surveillance. While traditional methods rely on visual data, issues like poor lighting, occlusion, and suboptimal angles often hinder performance. To address these challenges, we introduce WhoFi, a novel pipeline that utilizes Wi-Fi signals for person re-identification. Biometric features are extracted from Channel State Information (CSI) and processed through a modular Deep Neural Network (DNN) featuring a Transformer-based encoder. The network is trained using an in-batch negative loss function to learn robust and generalizable biometric signatures. Experiments on the NTU-Fi dataset show that our approach achieves competitive results compared to state-of-the-art methods, confirming its effectiveness in identifying individuals via Wi-Fi signals.
Citations
Discussions
- WhoFi: Deep Person Re-Identification via Wi-Fi Channel Signal Encoding [hn, 55 points, 10 comments]
- You can be identified via Wi-Fi by analyzing how your body affects signal amplitude. 95.5% detection accuracy. arxiv.org/pdf/2507.128... [bsky, 36 points, 2 comments]
- Eksperci potrafią identyfikować i śledzić ludzi dzięki sygnałom Wi-Fi odbijającym się od ciała — z dokładnością ponad 95%. Technologia może mieć zastosowanie w bezpieczeństwie, ale budzi obawy o prywa [bsky, 7 points, 0 comments]
- WhoFi: Deep Person Re-Identification via Wi-Fi Channel Signal Encoding [hn, 4 points, 0 comments]
- 🤔Tracking (people without tech - where is the policy tho?: arxiv.org/abs/2507.12869 #whofi #encoding #infosci #videosurveillance #infopolicy [bsky, 1 points, 0 comments]
- This research introduces "WhoFi" for Re-Identification via Wi-Fi signals : - Uses Wi-Fi CSI (Channel State Info) - Encoder extracts signal patterns - Signature module creates a unique ID - L2-normaliz [bsky, 1 points, 0 comments]
- WhoFi: Deep Person Re-Identification via Wi-Fi Channel Signal Encoding [hn, 1 points, 0 comments]
- WhoFi: Deep Person Re-Identification via Wi-Fi Channel Signal Encoding https://arxiv.org/abs/2507.12869 [bsky, 0 points, 0 comments]
- WhoFi: Deep Person Re-Identification via Wi-Fi Channel Signal Encoding [bsky, 0 points, 0 comments]
- WhoFi: Deep Person Re-Identification via Wi-Fi Channel Signal Encoding https://arxiv.org/abs/2507.12869 (https://news.ycombinator.com/item?id=44685869) [bsky, 0 points, 0 comments]
- Wi-Fi for person re-ID? “WhoFi” uses CSI signal distortions as biometric signatures—no camera needed. A Transformer-based DNN outperforms visual baselines on NTU-Fi. Privacy-preserving, robust, and su [bsky, 0 points, 0 comments]
- WhoFi: Deep Person Re-Identification via Wi-Fi Channel Signal Encoding [bsky, 0 points, 0 comments]
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