Biometric recognition technology used in smart door locks

1、 Fingerprint recognition technology (the most basic and popular)
Optical fingerprint recognition
Capture fingerprint images through light reflection
Low cost, but poor fingerprint recognition for wet hands, dirty hands, and elderly people with shallow fingerprints
Easy to be cracked by fake fingerprint film, with average security
Semiconductor fingerprint recognition (capacitive)
Detecting changes in the capacitance of the dermis layer and conducting in vivo testing
Fast recognition, high accuracy, and anti fake fingerprints
At present, high-end intelligent locks are standard equipment
AI self-learning fingerprint
The fingerprint template will be updated every time it is unlocked
Stronger adaptability to finger peeling, wear, and changes in dryness and wetness
2、 Facial recognition technology (now high-end mainstream)
2D facial recognition (largely phased out)
With just a regular camera, photos and videos can be cracked
Extremely low security, no longer used by legitimate brands
3D structured light facial recognition
Reconstructing a 3D facial model by projecting tens of thousands of light points
Anti photo, video, mask, can also be used in low light
The highest security level is commonly used in high-end models from Apple, Huawei, and Deshmann
3D ToF facial recognition
Flight time ranging, calculating facial depth information
Anti strong light, anti backlight, good outdoor stability
Xiaomi and some mid-range high-end locks are commonly used
binocular stereo vision
Dual camera simulation of human eye distance measurement
Moderate cost, better safety than 2D, slightly lower than structured light/ToF