Facial recognition tech booms despite accuracy concerns. Police arrests surge while airports and restaurants trial facial payments and passport-free travel.

A big biometric security company in the UK, Facewatch, is in hot water after their facial recognition system caused a major snafu - the system wrongly identified a 19-year-old girl as a shoplifter.

  • Buddahriffic@lemmy.worldEnglish
    8·
    7 months ago

    I’m curious how well the systems can differentiate doppelgangers and identical twins. Or if some makeup is enough to fool it.

    • PM_Your_Nudes_Please@lemmy.worldEnglish
      22·
      7 months ago

      Facial recognition uses a few key elements of the face to hone in on matches, and traditional makeup doesn’t obscure any of those areas. In order to fool facial recognition, the goal is often to avoid face detection in the first place; Asymmetry, large contrasting colors, obscuring one (or both) eyes, hiding the oval head shape and jawline, and rhinestones (which sparkle and reflect light nearly randomly, making videos more confusing) seem to work well. But as neural nets improve, they also get harder to fool, so what works for one system may not work for every system.

      CV Dazzle (originally inspired by dazzle camouflage used on some warships) is a makeup style that tries to fool the most popular facial recognition systems.

      Note that those tend to obscure the bridge of the nose, the brow line, the jawline, etc… Because those are key identification areas for facial recognition.

      • Buddahriffic@lemmy.worldEnglish
        5·
        7 months ago

        Yeah, if we can still recognize those as faces, it’s possible for a neural net to do so as well.

        But I’m talking more about differentiating faces than hiding entirely from such systems. Like makeup can be used to give the illusion that the shape of the face is different with false contour shading. You can’t really change the jawline (I think… I’m not skilled in makeup myself but have an awareness of what it can do) but you can change where the cheekbones appear to be, as well as the overall shape of the cheeks, and you can adjust the nose, too (unless it’s a profile angle).

        I think the danger in trying to hide that you have a face entirely is that if it gets detected, there’s a good chance that it will be flagged for attempting to fool the system because those examples you gave are pretty obvious, once you know what’s going on.

        It would be like going in to a bank with a ski mask to avoid being recognized vs going in as Mrs Doubtfire. Even if they are just trying to do banking that one time, the ski mask will attract unwanted attention while using a different face would accomplish the goal of avoiding attention.