Facial recognition software can be classified into a major category of technologies called biometric recognition. Biometric technology uses biometric information to verify identity. The theory behind biometric recognition is that our bodies contain unique features that can be used to distinguish us from others. In addition to facial recognition, biometric identity verification methods also include fingerprint scanning, retinal scanning, and speech recognition.

Facial recognition system, with facial recognition technology as its core, is an emerging biometric technology that is currently a high-precision and cutting-edge technology in the international scientific and technological field. Facial recognition is highly popular due to its non replicability, convenient collection, and no need for the cooperation of the subject being photographed. Facial recognition systems have a wide range of applications, including eliminating voting fraud, verifying withdrawal identities, and ensuring computer security.