Sorry, don't buy it.
Gait analysis is excellent at identifying people, and that's projecting from a 2D image at a distance.
Anything which can draw a moving voxel cloud around a human is going to figure out who that human is eventually.
Gait analysis is excellent at identifying people, and that's projecting from a 2D image at a distance.
Anything which can draw a moving voxel cloud around a human is going to figure out who that human is eventually.
Plenty of real world privacy exists on a spectrum. My family knowing I'm in the bathroom is a far cry form them pointing a camera at me.
If stores track you "anonymously" with this ... Who cares? It's less invasive than the ubiquitous security cameras they have pointed at you.
If you have ideas how to reconstruct an image with 4 receivers / 2-3 transmitters, please, buy a dev kit from TI (they cost <$200, https://www.mouser.com/c/?q=mmwave) and show us a demo.