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What biometric technologies are there?
Biometric technology includes fingerprint recognition, face recognition, voice recognition and signature recognition. ?

1, fingerprint identification

By analyzing the characteristics of ridges, valleys and endpoints, bifurcation points or bifurcation points of fingerprints, the feature values are extracted, and the identity of people is confirmed by comparing the feature values of fingerprints.

2. Face recognition

In real life, the identification between people is not through fingerprints, palm prints, irises, etc. , but through the face (face) recognition.

3. Speech recognition

Speech recognition is a behavioral feature recognition technology. Speech recognition equipment constantly measures and records the waveform and changes of speech. Speech recognition is based on accurately matching the collected speech with the registered speech template.

4. Signature verification?

Everyone has his own unique writing norms, so signature recognition can be used as a biometric and belongs to behavioral measurement. Digital signature is a process of measuring the image itself and the whole signature action, including the different speed, sequence and pressure between each letter.