How does face swipe payment work? What is the principle of face swipe face payment?

The principle of face swipe payment is face recognition technology, and face recognition is a form of biometrics.

"Biometrics" sounds lofty, but in human terms it means: teaching a machine to recognize a person - letting the machine determine whether the person who is using the account right now is the owner of the account or not, in order to perform identity verification.

Extended reading:

Technical principle: facial feature template recognition

Alipay's face recognition technology uses regional feature analysis algorithms that are widely used in the field, which combines computer image processing technology and biostatistics principles in one, the use of computer image processing technology to extract the portrait feature points from the video, and the use of biostatistics principles of biometrics for analysis to establish a mathematical model, i.e., a face feature template. The built face feature template is used to characterize the human face image with the person under test, and a similarity value is given according to the result of the analysis. From this value it can be determined if it is the same person.

To be more technically geeky, Alibaba provided materials showing the technical principle is: this system face recognition in all aspects of all based on deep neural network technology (CNN), through the face detection, key point localization, feature extraction and feature comparison and other technical means, from the image or video discovery, localization of the face and then identify the face belongs to the identity of the person.

The system is said to have accumulated 1 billion face image data.