ISTOCK
Have you ever wondered how your phone or tablet unlocks itself just by looking at your face? This clever technology is called facial recognition, and it uses a mix of maths, cameras, and computer smarts to work its magic.
When you set up facial recognition on your device, the camera takes a detailed picture of your face. But it’s not just a photo—it measures things like the distance between your eyes, the shape of your cheekbones, and the curve of your jaw. All these details are turned into a unique code, a bit like a digital map that only matches your face.
Each time you try to unlock your device, the camera quickly scans your face and compares it to the saved map. If everything lines up, your device unlocks in a snap. The process is so fast, you barely notice it’s happening.
Advanced systems even work in low light or from different angles, and some can tell the difference between a real face and a photo, so no one can trick it with a picture. Thanks to facial recognition, your device stays secure and only unlocks for you—no passwords needed!