Issue link: https://let.epubxp.com/i/320907
29 www.officer.com June 2014 Law Enforcement Technology COVER STORY according to its brochure, "room gen- eral layout, including dimensions and major infrastructure elements." Officers are presented with a 3-D image of the room, as well as a similar top-down view from a previous model. Apart from sound waves and radar, Massachusetts Institute of Technology (MIT) published a paper reporting the possibility of utilizing a Wi-Fi signal for human detection and tracking behind a wall—it tells of a successful experiment where a team tracked an iRobot Create robot. In the film "The Dark Knight," a system turned cellphones into a type of sonar; returning signals created a 3-D digital map of the world, allowing characters to see layout and positions. The MIT team calls their version Wi-Vi (Wi-Fi Vision). The paper, "See Through Walls with Wi-Fi!" written by Fadel Adib and Dina Katabi, lists three areas where this technology can be utilized: gesture-based interfaces, infrared and thermal imaging, and through-wall radar. It explains an early attempt in using a Wi-Fi signal to see through a wall was done in 2012. However, this required a transmitter and a receiver inside the room—not very practical when placement of such a device inside is, well, not an option. The paper writes, "in contrast, Wi-Vi can perform through-wall imaging See what you've been missing. 6496 pr-infrared.com • 800-722-8078 A DIVISION OF P&R; TECHNOLOGIES, INC Thermal imaging sees clearly in total darkness —and through light smoke, dust, fog, even foliage! FLIR LS $3,999 FLIR M-24 $5,880 FLIR M-18 $9,208 FLIR T70 SIGHT $14,900 Circle 57 on Reader Service Card A vertical take off and landing UAV integrated with Camero-Tech's radar technology sends the detection data to a handheld. The Airbrone Imagine Drone might also help with search and rescue operations. LET_26-31_ThroughWall0614.indd 29 5/20/14 1:45 PM