The system measures the facial hole and generates a facial pattern, which is a unique numerical code for the face. After storing the facial pattern, the system will compare it with thousands or millions of facial pattern data stored in the database. Each facial pattern is stored as an 84 byte file. The system can match facial pattern data in memory at a speed of 60 million faces per minute, and for facial pattern data in the hard drive, it can match 15 million faces per minute. Operators can view two photos declared as matches to determine if the computer's operation is accurate.

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.