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).
Good point, didn’t actually watch it all. Thanks for part 2 😁
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)