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Face recognition mainly has the following characteristics:

First, the advantages of face recognition

1. Nature refers to identifying people by observing their natural facial biological characteristics. The identification method is very convenient, and users do not need to carry any certificates or do other operations.

2. Imperceptibility, which can actively obtain the recognized face image information and make the tested individual unconscious. Face recognition is a multi-light source face image recognition technology that uses visible light to obtain face image information, or combines infrared light and visible light. This special collection method can be ignored and will not fall into the situation of camouflage and deception.

3. Non-contact, compared with other biometric technologies, face recognition is non-contact, users do not need to directly contact the face with the equipment, and can meet the needs of many people for continuous recognition and sorting of face image information at the same time.

4. Non-invasive, the non-contact of face recognition also brings non-invasive experience to the interviewee. Face collection does not need the cooperation of collectors or the intervention of staff. Moreover, face is an exposed biological feature, so the recognition and collection of face is easy to be accepted by the public.

Second, the disadvantages of face recognition technology.

Because of the similarity of faces, there is little difference between different individuals, and the structures of all faces are similar, which increases the difficulty of identifying twins with makeup. There is also the variability of the face, the appearance of the face is very unstable, and many expressions can be produced through the change of the face, and the visual image of the face is different from different observation angles. In addition, face recognition is also affected by many factors, such as lighting conditions, a lot of face cover, age and so on.