Visual Light Landmarks for Mobile Devices
Niranjini Rajagopal, Patrick Lazik, Anthony Rowe

Citation
Niranjini Rajagopal, Patrick Lazik, Anthony Rowe. "Visual Light Landmarks for Mobile Devices". Talk or presentation, 5, November, 2013; Poster presented at the 2013 TerraSwarm Annual Meeting.

Abstract
We present a system that enables interior ambient LED lighting luminaires to communicate with mobile devices, by exploiting the rolling shutter camera sensors that are common on tablets, laptops and smartphones. The light operates above the humanly perceivable flicker frequency where the cameras and photodiodes can still detect changes in light intensity. Our system supports multiple light sources in a single collision domain, and works for both, line-of-sight operation as well as from reflected surfaces like those found in architectural lighting. The poster will be accompanied by a demonstration. Four LED ambient lights, acting as location landmarks will transmit modulated data, and a mobile device will receive and process the signal in order to identify the closest landmark. This will allow observers to see the practical effects of – multiple-access, distance from the lights, camera parameters, and LED frequency of operation etc.

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Citation formats

• HTML

  Niranjini Rajagopal, Patrick Lazik, Anthony Rowe. <a
  href="http://www.terraswarm.org/pubs/203.html"><i>Visual
  Light Landmarks for Mobile Devices</i></a>, Talk
  or presentation,  5, November, 2013; Poster presented at the
  <a
  href="http://www.terraswarm.org/conferences/13/annual"
  >2013 TerraSwarm Annual Meeting</a>.

• Plain text

  Niranjini Rajagopal, Patrick Lazik, Anthony Rowe.
  "Visual Light Landmarks for Mobile Devices". Talk
  or presentation,  5, November, 2013; Poster presented at the
  <a
  href="http://www.terraswarm.org/conferences/13/annual"
  >2013 TerraSwarm Annual Meeting</a>.

• BibTeX

  @presentation{RajagopalLazikRowe13_VisualLightLandmarksForMobileDevices,
      author = {Niranjini Rajagopal and Patrick Lazik and Anthony
                Rowe},
      title = {Visual Light Landmarks for Mobile Devices},
      day = {5},
      month = {November},
      year = {2013},
      note = {Poster presented at the <a
                href="http://www.terraswarm.org/conferences/13/annual"
                >2013 TerraSwarm Annual Meeting</a>},
      abstract = {We present a system that enables interior ambient
                LED lighting luminaires to communicate with mobile
                devices, by exploiting the rolling shutter camera
                sensors that are common on tablets, laptops and
                smartphones. The light operates above the humanly
                perceivable flicker frequency where the cameras
                and photodiodes can still detect changes in light
                intensity. Our system supports multiple light
                sources in a single collision domain, and works
                for both, line-of-sight operation as well as from
                reflected surfaces like those found in
                architectural lighting. The poster will be
                accompanied by a demonstration. Four LED ambient
                lights, acting as location landmarks will transmit
                modulated data, and a mobile device will receive
                and process the signal in order to identify the
                closest landmark. This will allow observers to see
                the practical effects of – multiple-access,
                distance from the lights, camera parameters, and
                LED frequency of operation etc.},
      URL = {http://terraswarm.org/pubs/203.html}
  }
  

Posted by Niranjini Rajagopal on 12 Nov 2013.