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.

Your face is an important element that identifies you, and others will also recognize you through your face. Imagine how difficult it would be to recognize a person if all faces were the same. Apart from twins who look almost identical, a face is undoubtedly the most unique physical feature of a person. Not only do humans have the innate ability to recognize and distinguish millions of different faces, but computers are also catching up with this ability.