While you're correct, it isn't mandatory to have two cameras for decent depth perception. However it would require a new sensor type. Humans are capable of sen

While you're correct, it isn't mandatory to have two cameras for decent depth perception. However it would require a new sensor type. Humans are capable of sensing depth with only one eye, this is due to the shape of our eye. Camera's work by receiving a 3D image on a 2D sensor. Our eyes work by receiving a 3D image on a 3D sensor. Our focal point is akin to a 2D sensor, but our peripheral vision wraps around a huge portion of our eye, which gives us the ability to triangulate. While I doubt they'll have come up with a 3D sensor, I wanted to make it a point that depth perception with a single sensor is difficult for a computer presently. It would be entirely possible to design a more complicated camera, to compensate for the algorithms. From the video, I'd guess they're either using two similar resolution cameras. Or they might be cheaping out. Using a 12MP camera would give you amazing picture resolution, however for 3D recognition, you could probably get away with amazing resolution for a project like this with something less than 1MP as the companion. This is essentially how one of our eyes work, we have incredible resolution in the focal point, but our peripheral vision is rather poor, but our brain superimposes the images scanned (quite literally our eye scans the environment using the focal point) and fakes everything. I'm sure using a small, cheap companion sensor would provide 3D extremely well for movement recognition.