I wired my tree with 500 LED lights and calculated their 3D coordinates | Lobsters

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I wired my tree with 500 LED lights and calculated their 3D coordinates video hardware visualization youtube.com
via ignaloidas 2 years ago | archive
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  Nesh 2 years ago | link
  TL;DW:
  
  Put the LEDs on the target tree
  
  turn off lights, put camera from viewing point
  
  run script that maps LEDs to 2D coordinates (turn on 1 LED, take photo, find brightest pixels average)
  
  write code that turns on the lights depending on this coordinate list instead of their pixels order
  
  Done
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    fkooman 2 years ago | link
    
    It goes a bit further by also mapping them to 3D coordinates (by rotating the tree and fixing LED detection bugs when the LEDs are hidden behind branches at some angles).
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      Nesh 2 years ago | link
      
      Good point, didn’t actually watch it all. Thanks for part 2 😁
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  sigio 2 years ago | link
  
  A few days ago Techmoan also posted a video of a X-mas tree with adressable led’s, but that was a commercial off-the-shelf solution, which used a phone-camera and app to control the leds. It did a 3d-scan in a matter of seconds, by toggling all leds at the same time, but with different colors. Must be quite a nice bit of tech/maths behind that to do it so quickly. https://www.youtube.com/watch?v=DYVMeyGEWes (the techmoan video)