ATLANTA – Delta Air Lines plans to launch what it calls the nation's first "biometric terminal" by deploying facial recognition at multiple points in the international terminal at Hartsfield-Jackson Atlanta International Airport.

At the Maynard H. Jackson International Terminal and Concourse F at the Atlanta airport, Delta plans to use facial recognition at check-in, at the security checkpoint, at boarding and at Customs processing.

Atlanta-based Delta says international travelers flying on Delta between Atlanta and other countries can use facial recognition instead of their passports to get through those checkpoints at the airport.

It's similar to what has been launched at other airports globally, including a biometric terminal opened last fall at Singapore Changi airport. Other airlines have also tested the use of biometrics at other airports.

In Atlanta, plans are for the technology to be at Concourse F gates at Hartsfield-Jackson by Oct. 15 and throughout the international terminal by Dec. 1.

However, international travelers will still need to bring their passports, and will still need to show their boarding passes at the Transportation Security Administration checkpoint.

And Delta's deployment of facial recognition for international passengers in the international terminal doesn't change the process for those traveling on domestic flights, or people flying other airlines.

Passengers have the option to opt out of the facial recognition process, according to Delta.

Those who want to use facial recognition can approach a kiosk in the lobby and click "Look," or approach a camera at the ticket counter, the TSA checkpoint or when boarding. Once a green check mark flashes on the screen, the passenger can proceed.

Some privacy advocates have warned of risks of security based on facial scans.

A senior staff attorney with digital rights nonprofit Electronic Frontier Foundation, Jennifer Lynch has said she is wary of facial recognition, and sees a threat to privacy, "our constitutional 'right to travel' and right to anonymous association." And she said the greatest concern is the risk of a data breach.

According to Delta, facial recognition can save up to nine minutes of time during boarding. Passengers on Delta partner carriers Air France-KLM, Virgin Atlantic and Aeromexico can also use facial recognition technology in the international terminal at Hartsfield-Jackson.

"We're scaling first in Atlanta at Concourse F, and as we get experience with that we're going to look to scale it throughout our system ultimately," said Gil West, chief operating officer of Delta. "We think it will over time become the norm in the travel experience."