This is a decoded image from a LIDAR. LIDAR is an acronym for LIght Detection And Ranging. There was one placed in the middle of a robotics expo hall I was visiting a couple of days ago. You can clearly see the people walking around. You can also see things like people lining up at the back snack bar and sitting at tables eating.
This hardware is used on vehicles to scan the surroundings and not crash into things. It’s very expensive and of military grade.
Music: Bjorn Fogelberg