I did an installation last week with the radarTouch from Lang and had no problems via TUIO. Everything just worked.
I contacted Leuze ahead of our project, but never got an answer, so I don’t know what’s the difference here. Also I don’t know what the pricing of the Leuze is.
The Lang radarTouch is pretty expensive, but I guess that Lang developed the custom calibration software, which they deploy with their dongle.
I don’t know anything about the coolux airscan, but if I remember correctly I contacted a reseller a few years ago and it was significantly cheaper than the radarTouch. But for some reasons we didn’t work with the airScan, so I have no experiences to share.
Yes, you will run into issues like shadowing and occlusion.
Think of it as a light emitter. It sends out IR light through a rotating prisma in the form of a japanese fan and does a runtime measurement when some obstacle enters the user-defined scanning area (I think). So, of course someone (or something) right in front of the device will cast a big shadow.
Maybe you can combine 2 or more of them for a better coverage? Technically this shouldn’t be a big problem.
You have to position the devices in a way that the don’t “spill” into each others sensor, of course.
I don’t know how to combine them, but they provide a combination in the setup software and also you could just fetch the tuio data from both devices and combine them in vvvv, no?
The thermal cam has only a resolution of 16x16 px… Not that much.