Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Video

Updated: Jan 5, 2026

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
08:48

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

Published on: September 25, 2020

6.2K

Intelligent metasurface imager and recognizer.

Lianlin Li1, Ya Shuang1, Qian Ma2

  • 11State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronics, Peking University, Beijing, 100871 China.

Light, Science & Applications
|October 25, 2019
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Development of a CRISPRi system in <i>Fusarium fujikuroi</i> and its application in gibberellic acid production.

Engineering microbiology·2026
Same author

An Assisting Contact Electrification Strategy for Achieving Self-Recoverable Mechanoluminescence.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

Chiral Quasi-Bound States in the Continuum on the Verge of the Light Cone.

Nano letters·2026
Same author

Metaceramic enables ultrahigh-temperature record rectification and programmable 3D thermal control.

Science advances·2026
Same author

A less-for-more metamaterial paradigm via Laplace-Helmholtz correspondence.

Reports on progress in physics. Physical Society (Great Britain)·2026
Same author

A Machine Learning Approach to Prioritize Place-Based Prevention to Address Cardiovascular Disease Burden in New York City.

American journal of preventive medicine·2026
Same journal

Two-photon 3D imaging of optically stimulated neural activity at 100 Hz.

Light, science & applications·2026
Same journal

Quasi-bound states in the continuum driven photoresponse in multiple quantum wells for machine vision.

Light, science & applications·2026
Same journal

Spin-photon qubits for scalable quantum network.

Light, science & applications·2026
Same journal

Dual-mode switchable and reconfigurable Van der Waals phototransistor for multi-state image encryption.

Light, science & applications·2026
Same journal

Weak polarization electric field Ⅲ-N LEDs on polar plane with enhanced efficiency and strong lateral carrier confinement.

Light, science & applications·2026
Same journal

Bi-layer photonic random meta-composite for cryogenic thermal control by ultra-broadband scattering matched reflectance.

Light, science & applications·2026
See all related articles

This study introduces a smart metasurface system using artificial neural networks (ANNs) for real-time, non-cooperative human monitoring. It enables passive, privacy-preserving imaging and recognition via ubiquitous Wi-Fi signals.

Area of Science:

  • Applied Physics
  • Artificial Intelligence
  • Electrical Engineering

Background:

  • Conventional remote monitoring systems require user cooperation or active devices, limiting real-world applications.
  • There is a growing demand for non-intrusive, passive monitoring solutions for daily life applications.

Purpose of the Study:

  • To develop a novel system for simultaneous, real-time imaging and recognition of multiple non-cooperative individuals using radio-frequency signals.
  • To enable adaptive control of data flow and recognition tasks through an integrated artificial neural network (ANN) hierarchy.

Main Methods:

  • A smart metasurface imager and recognizer was developed, integrated with a network of three ANNs.
  • Microwave data was processed to generate full-body images, classify specific body parts (hand, chest), and recognize hand gestures at Wi-Fi frequencies.
Keywords:
Electronics, photonics and device physicsOptical physics

More Related Videos

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
09:33

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Published on: June 7, 2019

6.6K
Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
13:44

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

15.8K

Related Experiment Videos

Last Updated: Jan 5, 2026

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
08:48

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

Published on: September 25, 2020

6.2K
Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
09:33

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Published on: June 7, 2019

6.6K
Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
13:44

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

15.8K
  • The system was designed to operate passively, utilizing ambient Wi-Fi signals.

    • Main Results:

    • The system achieved instantaneous in situ full-scene imaging of multiple non-cooperative individuals.
    • Adaptive recognition of hand gestures and classification of designated body spots were successfully demonstrated.
    • The intelligent metasurface system proved effective even when passively excited by stray Wi-Fi signals.

    Conclusions:

    • The proposed intelligent metasurface strategy offers a new paradigm for privacy-preserving remote sensing.
    • This technology has potential applications in smart cities, smart homes, human-device interaction, and health monitoring.