New artificial intelligence technology developed at MIT can see through walls, and it knows what you’re doing.  

RF-Pose, created by researchers at the Computer Science and Artificial Intelligence Laboratory (CSAIL), uses wireless signals to estimate a person’s pose through a wall. It can only come up with a 2D stick figure of your movements, but it can nonetheless see your actions. The system, described in a new paper [PDF], uses a neural network to piece together radio signals bouncing off the human body. It takes advantage of the fact that the body reflects radio frequency signals in the Wi-Fi range. These Wi-Fi signals can move through walls, but not through people.