Here is a summary of how biometric facial verification works:

1. Image Capture: A camera captures an image or video of a person’s face.

2. Feature Mapping: The system maps key facial features (e.g., distance between eyes, shape of the cheekbones, contour of the lips, etc.).

3. Data Conversion: These facial features are converted into a mathematical model—a "facial signature."

4. Comparison: The facial signature is compared to stored data (in a database or ID document) to confirm the person’s identity.

5. Decision: If the facial data matches, the system verifies or identifies the person.