Visible light based activity sensing using ceiling photosensors

Mohamed Ibrahim, Viet Nguyen, Siddharth Rupavatharam, Minitha Jawahar, Marco Gruteser, Richard Howard

Research output: Chapter in Book/Report/Conference proceedingConference contribution

15 Scopus citations

Abstract

This paper explores the feasibility of tracking motion and activities of humans using visible light. Shadows created by casting visible light on humans and objects are sensed using sensors that are embedded along with the light sources. Existing Visible Light Sensing (VLS) techniques require either light sensors deployed on the floor or a person carrying a device. Our approach seeks to measure light reflected off the floor to achieve an entirely device-free and light-source based system. We co-locate photosensors with LED light sources to observe the changes in light level occurring on the floor. Our system also uses a sensitive standard difference measurement technique to detect small voltage changes, together with a time division flickering scheme to differentiate between light nodes. We evaluate the feasibility of our system in detecting simple activities, and show that it can detect door opening events at 12% Equal Error Rate.

Original languageEnglish (US)
Title of host publicationProceedings of the 3rd Workshop on Visible Light Communication Systems, VLCS 2016
PublisherAssociation for Computing Machinery
Pages43-48
Number of pages6
ISBN (Electronic)9781450342537
DOIs
StatePublished - Oct 3 2016
Event3rd ACM Workshop on Visible Light Communication Systems, VLCS 2016 - New York, United States
Duration: Oct 3 2016Oct 7 2016

Publication series

NameProceedings of the Annual International Conference on Mobile Computing and Networking, MOBICOM
Volume03-07-October-2016

Other

Other3rd ACM Workshop on Visible Light Communication Systems, VLCS 2016
CountryUnited States
CityNew York
Period10/3/1610/7/16

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Hardware and Architecture
  • Software

Keywords

  • Activity sensing
  • Ceiling photosensors
  • Visible light sensing

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  • Cite this

    Ibrahim, M., Nguyen, V., Rupavatharam, S., Jawahar, M., Gruteser, M., & Howard, R. (2016). Visible light based activity sensing using ceiling photosensors. In Proceedings of the 3rd Workshop on Visible Light Communication Systems, VLCS 2016 (pp. 43-48). [2981554] (Proceedings of the Annual International Conference on Mobile Computing and Networking, MOBICOM; Vol. 03-07-October-2016). Association for Computing Machinery. https://doi.org/10.1145/2981548.2981554