Facial recognition

Facial recognition is a biometric technology that analyzes facial features in images or video to identify or verify a person’s identity.

Facial recognition is a biometric technology that identifies or verifies people by analyzing facial features. It's used in devices and security systems, but raises privacy and bias concerns.

What it is

Facial recognition systems typically detect a face in an image or video, align it, extract distinctive features such as the distance between facial landmarks, and convert those into a numerical template. That template is then compared to a stored database to verify or identify a person.

Key details

The technology can be used for one-to-one verification (e.g., unlocking a phone) or one-to-many identification (e.g., matching a face against a watchlist). Common uses include device unlocking, access control, identity verification, and some law enforcement and commercial applications. Accuracy varies by system, lighting, image quality, and demographic group; errors and false matches remain possible even as the technology improves.

Why it matters

Facial recognition raises privacy and surveillance concerns because facial data can be collected and stored at scale, and errors may amplify bias or lead to false positives. In Canada, biometric data such as facial information is generally subject to privacy law, and legality depends on the organization, purpose, consent, and compliance with applicable privacy requirements.