Do you know what technical principles the face recognition attendance machine uses?

We often see Face Recognition Time Attendance machines, and you can successfully punch in while standing in front of the Time Attendance machine. Do you know what technical principles are used by Face Recognition time attendance machines? The following time attendance machine retail editor will share with you, I hope Help everyone.

Facial recognition, specifically refers to the computer technology that uses the analysis and comparison of facial visual feature information for identity identification. Face recognition is a popular computer technology research field. ) itself to distinguish individual organisms.
The face recognition technology is based on the facial features of the person, and the input face image or video stream. First determine whether there is a human face, if there is a human face, then further give the position, size and location of each face. The location information of each main facial organ, and based on this information, the identity features contained in each face are further extracted and compared with known faces to identify the identity of each face.
A widely used regional feature analysis algorithm in face recognition technology, which integrates computer graphics
Image processing technology and biostatistics principles are integrated, using computer image processing technology to extract portrait feature points from video, using biostatistics principles to analyze and establish a mathematical model, that is, face feature template, using the established face feature template Carry out feature analysis with the face of the person being tested, and give a similarity value according to the analysis result, through which it can be determined whether it is the same person.