A few years ago, Apple bought Primsense. Primsense made the sensor in the original Kinect. They've now integrated this into their Face ID system, or at least th

A few years ago, Apple bought Primsense. Primsense made the sensor in the original Kinect. They've now integrated this into their Face ID system, or at least that's what the keynote suggests. It projects a known random dot pattern and an ASIC does some image processing to figure out the depth in the image (nice patent, by the way). So they have two bits of info: the 3D reconstruction and an infrared image with/without dots, they also have a colour image using the FaceTime camera. I would be surprised if they didn't use more information than just the point cloud. Biometric security at airports uses a similar system, you can see the laser light when yo go through the e-Passport gates. https://techcrunch.com/2017/09/12/iphone-x-basically-has-a-kinect-on-the-front-to-enable-faceid/ https://techcrunch.com/2017/09/12/iphone-x-basically-has-a-k...