When Facebook announced the service last week, the company said it's using facial recognition technology to make it easier for users to tag photos of friends and family members.
The company has been quietly rolling out the new technology to test groups since late last year.
Once in service, Facebook's system could be able to recognize the faces of its 500 million to 700 million users worldwide.
In just a few weeks, the system will scan all photos posted to Facebook and will provide the names of the people who appear in each shot. All of Facebook's users will be automatically added to the database.
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