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mmHand: Toward Pixel-Level-Accuracy Hand Localization Using a Single Commodity mmWave Device

Summary

The paper introduces mmHand, a device-free, privacy-preserving dynamic hand localization system that reaches pixel-level accuracy using a single commodity mmWave radar, validated on 12 subjects across three scenarios.

SourcearXiv Computer VisionAuthor: Xiaoyu Zhang, Zhengxiong Li, Chenhan Xu, Luchuan Song, Huining Li, Hongfei Xue, Yingxiao Wu, Wenyao Xu
mmHand: Toward Pixel-Level-Accuracy Hand Localization Using a Single Commodity mmWave Device
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[Submitted on 20 Oct 2026]

Title:mmHand: Toward Pixel-Level-Accuracy Hand Localization Using a Single Commodity mmWave Device

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Abstract:The hand localization problem has been a longstanding focus due to its many applications. The task involves modeling the hand as a singular point and determining its position within a defined coordinate system. However, due to data modality limitations, existing hand localization technologies face several challenges. For example, vision-based localization raises privacy concerns, while wearable-based methods compromise user comfort. In this paper, we introduce mmHand, a new device-free, privacy-preserving dynamic hand localization system with pixel-level accuracy, using a single commodity mmWave device. We first propose a mmImage generation tool to fully extract spatial information from raw mmWave data and introduce a novel 2D image-format representation of mmWave data. Next, we design a framework that provides a new quality evaluation method and pixel space labeling for the mmWave data. Finally, we present a cross-modality spatial feature-enhanced model with high spatial feature extraction capabilities, which can accurately localize hand positions at the pixel level in the mmWave radar U-V pixel coordinate system. We evaluate the system with experiments on 12 subjects in three scenarios, and the results across four metrics demonstrate the effectiveness of our hand localization system.

Subjects:

Computer Vision and Pattern Recognition (cs.CV)

Cite as: arXiv:2611.05404 [cs.CV]

(or arXiv:2611.05404v1 [cs.CV] for this version)

https://doi.org/10.48550/arXiv.2611.05404

arXiv-issued DOI via DataCite

Journal reference: IEEE Internet of Things Journal, vol. 12, no. 12, pp. 20800-20814, 2025

Related DOI:

https://doi.org/10.1109/JIOT.2025.3546560

DOI(s) linking to related resources

Submission history

From: Xiaoyu Zhang [view email] [v1] Tue, 20 Oct 2026 04:44:47 UTC (15,590 KB)

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Key points

  • Device-free, privacy-preserving hand localization with a single commodity mmWave device
  • mmImage tool converts raw mmWave data into a novel 2D image-format representation
  • Framework provides new quality evaluation and pixel-space labeling for mmWave data
  • Cross-modality spatial feature-enhanced model localizes hands at pixel level in the U-V coordinate system

Highlights and analysis are generated automatically and may contain errors. Check the original source.