Facebook lets users know when their pictures pop up

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With the new facial recognition features, the lumbering social media network will alert you to uploaded photos in which you are featured - so long as you are in a group permitted to see them by the uploader.

For which Facebook has this page with instructions about how to turn off tag suggestions for photos of you. The new Facebook Photo Review will roll out globally in the next few weeks, except for Canada and Europe, where facial recognition tech would violate privacy laws. "We decided, in consultation with privacy advocates and people, that the best approach for this offering was to notify people on Facebook and provide a way to adjust it in their account settings at any time". After switching it on, it will recognize your photos on Facebook and will notify you.

According to a blog post from Joaquin Quiñonero Candela, the company's director of applied machine learning, you have to authorize Facebook to access, store, and then match your face data with uploads across the site.

Tech companies are putting in place a variety of functions using facial recognition technology, despite fears about how the facial data could be used.

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This way, upon receiving a notification that they appeared in someone's photos on Facebook, users can either tag themselves in the photos or ask the respective person to take them down.

Facebook lets the person posting a photo have the final say this way in order to deal with situations like public speaking events, where the speaker shouldn't have control over what's shared. Consequently, one has the option to opt out of the feature altogether.

"When you have face recognition enabled, our technology analyses the pixels in photos you're already tagged in and generates a string of numbers we call a template".

Facebook had launched an automatic alt-text tool two years ago, which describes photos to people with vision loss. "When photos and videos are uploaded to our systems, we compare those images to the template", said Rob Sherman, deputy chief privacy officer in his statement. And because of a new face recognition service the social network is rolling out Tuesday, he can now learn which friends are in photos, even those who haven't been tagged by another user. "We thought it was important to have a really straightforward way of controlling facial recognition technology", he said.