[eternalvision]

Slightly off-topic: Does anyone know what is state-of-the-art for small cameras suitable for surreptitious security?

[bigiain]

Something lie this?

http://boingboing.net/2017/08/04/theyll-never-see-this-tiny-...

[eternalvision]

That's cool, but was thinking of something along the lines of what a PhD EE might conceive. Small chips out of sight using ultrasonic waves to create a detailed real-time 3d-map of a physical space, for instance.

[bigiain]

Ahhh - so not quite a "camera", but have you seen this:

http://people.csail.mit.edu/fadel/wivi/design.html

https://www.businessinsider.com.au/wifi-camera-sees-through-...

https://www.engadget.com/2017/06/19/researchers-map-a-buildi...