 Go for it All right, so hi everybody So I'm Cedric Honet. My name is not here So as with I was saying I basically worked on miniaturizing this thing Well, you saw the picture here. I also have it Basically it's wearable for rats I'm making it short, but there is to track 3d position of things Rats for example, but not just And you have a sub-minimetric increase so maybe The same place is to start with visualization of thing. I only have five minutes. I'm going to go super fast Okay, the video doesn't work, so I'll show you later. I don't Basically The the system can be put in a 3d printed object and it allows reconstructing a position and calibrating the position of the So the way the system works is that we have Oops Cedric was pointing at the city Yeah, so if you see at the ceiling You have those boxes that have They have lasers that scan the room and with those signals You can actually Estimate your position Using special timings. So if there's one thing that you have to remember of what I'm going to show you The simplicity But the the accuracy of what you can get out of just these simple lasers that are scanning them So what happens is that there is a flash and then a scan so You measure the time between the flash in the scan and it tells you where you are according to Let's say a virtual zero degree north. So let's say imagine Here's zero degree north and I'm going to scan but before I send a flash to everyone and you all start counting Zero one three you're at 30 degrees for example And then four and five so using the time because we know the speed of the rotation using this time You can estimate your position in 3d. So how does it work? You have a horizontal and a vertical scan that tell you We give you two angles and the point that you in 3d, but you have two places So here you see me And if you have one vector that points at you Another one that does the same You're hopefully at the intersection and you can estimate your position There's many other ways to do it. They're either not as accurate the tree forever. They're way too expensive We want to do tracking of tiny things and a lot of them and this is not possible with this kind of optical System or its periods I'm going to skip a few things not timing The normal approach is to use FPGAs. I know some of you guys like to play with them. I Found this trick that can be interesting for some of you Basically this microcontroller that I use. It's a it's a Bluetooth energy chip that has Context number four and a few other funds and this this is a very cool trick called PPI for programmable interface and basically it's something in the middle between an FPGA and a DMA that allows Basically in parallel in hardware doing time stamps of those photodiode signals that we get from these cans I can explain a bit more later if you're interested I won't go too much more in the detail because I have only one minute I basically did a characterization of the system using CNC and In this tracker and there's this thing that is interesting that no one Really talked about earlier Which is that the way the system is designed? it has this Distortion that 30 centimeters away from the base So if you have a distortion matrix you can reconstruct your position And I'm still working on this to improve the positioning, but basically for now we have something between 0.5 and 0.9 millimeter accuracy. So it's still reasonable There's many steps that we still need to work on if any of you is interested in Playing with the JavaScript for 3D visualization in VR and AR Please come talk to me I'm going to just skip that and basically these slides are on that URL If you want to contact me with some questions This is the first letter of my first name in the last name. It's a great one I think it shows. Anyway, the awesome guys They record all of it so you can find that later That's all for my five minutes