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                                                             on Gopher (inofficial)
   URI Visit Hacker News on the Web
       
       
       COMMENT PAGE FOR:
   URI   Seeing Around Corners Using Smartphone-Grade Lidar
       
       
        transpute wrote 1 hour 33 min ago:
        Ordinary WiFi can "see" through walls/corners with biometric
        fingerprinting of humans, [1] Researchers collected WiFi signal
        recordings from nearly 200 participants as they walked through a WiFi
        field using different walking styles. The data was recorded from four
        different perspectives using both the BFI method and an older WiFi
        sensing approach relying on channel state information, or CSI. 
        
          “This technology turns every router into a potential means for
        surveillance,” said co-author Julian Todt in the press release. “If
        you regularly pass by a café that operates a WiFi network, you could
        be identified there without noticing it and be recognized later – for
        example by public authorities or companies.”
        
          The researchers are urging the IEEE, the organization that sets
        industry standards, to include stronger privacy safeguards in the
        upcoming 802.11bf standard, which is meant to standardize WiFi sensing
        applications.
        
   URI  [1]: https://gizmodo.com/researchers-issue-warning-about-tech-that-...
       
        aftbit wrote 4 hours 18 min ago:
        Smartphone grade lidar == FaceID ?
       
          momoschili wrote 3 hours 7 min ago:
          depends on what phone you have but LIDAR sensors are used for more
          than just faceID
       
        mberlove wrote 4 hours 23 min ago:
        This specific finding is minor, but its implications are not IMHO. From
        the article it appears the researchers consider this a discovery in
        effect.
        
        If consumer hardware is already capable (in many settings) of
        reproducing what were formerly research-level and industry-grade
        techniques, it may be a transformation in more areas of technology than
        would be obvious. I am very curious to see if there will be further
        findings in this area.
       
          momoschili wrote 3 hours 9 min ago:
          This is a very natural progression of technologies that escape
          industry/defense to get into the consumer's hand.
       
          libria wrote 3 hours 56 min ago:
          The military/LEO is probably already envisioning a Daredevil like
          helmet with augmented-reality lenses that overlay non-line-of-sight
          threats in real time.
       
            deburo wrote 2 hours 52 min ago:
            Didn't we already have a video of that? I don't remember the data
            sources used to generate the overlay, however. Was it multiple
            solders' helmets sharing their data, and/or perhaps even a drone
            from above?
       
        ofrzeta wrote 6 hours 25 min ago:
        So this only works if you have walls opposite of this corner?
       
          wongarsu wrote 5 hours 14 min ago:
          The video thumbnail implies bouncing off the ground, not a wall. Not
          sure how the geometry works out for that
       
          libria wrote 6 hours 9 min ago:
          It seems to require a lidar reflective object. Likely more generally,
          the effectiveness lowers the less objects there are to bounce and
          return signal.
          
          It could probably work with less accuracy/resolution against visible
          vehicles in the opposite lane, a hedgerow, postal box, pedestrian
          carrying a visible laptop and possibly synthesize all of these to
          improve its guess.
       
        cuechan wrote 7 hours 50 min ago:
        Why not just place a mirror at 45 degrees in the corner? That way you
        don't need the lidar but you can just look around the corner? It would
        also work better with the lidar.
       
          noman-land wrote 2 hours 0 min ago:
          Mirrors allow two-way looking.
       
          devmor wrote 7 hours 14 min ago:
          I would be interested in seeing your  visual mockups of how such a
          solution works on one of the article’s examples, like a car.
       
            wongarsu wrote 6 hours 11 min ago:
            Like this: [1] Or this: [2] Reasonably common in difficult corners
            in Germany and Austria. Probably elsewhere too.
            
            The downside is that it's road infrastructure that has to be
            installed. The upside is that it works for everyone, including
            people in 20 year old cars or on bicycles.
            
   URI      [1]: https://c8.alamy.com/compde/t0580m/der-verkehr-kurve-spieg...
   URI      [2]: https://cdn-01-artemis.media-brady.com/Assets/ImageRoot/DM...
       
              pfortuny wrote 49 min ago:
              These are very common in Spain too.
       
              devmor wrote 1 hour 46 min ago:
              You know what, that’s fair. That’s a good solution.
              
              If it weren’t for the struggles of getting municipal
              infrastructure installed, I’d prefer it.
       
            dietrichsam wrote 6 hours 56 min ago:
            Every car just needs n number of mirrors on articulating joints and
            to sense any oncoming cars that need to see around a corner and
            then receive a command to reposition said mirror.
       
       
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