This is possible now. You need a database of faces. You could store and search them without compression in like clouds. Or you can compress them. 7 billion isn't that many pictures.
One problem is the databases of tagged faces typically have passport style photos and not sides. It would be easier with 3d type data of faces, like when we start using depth cameras at the DMV too. Or, we will develop sufficient methodology to figure it out well enough from the existing photos... depth from a single image.
It sounds sort of disturbing to me. Google reverse image search for faces... that team has done it or could do it easily. But privacy.
One problem is the databases of tagged faces typically have passport style photos and not sides. It would be easier with 3d type data of faces, like when we start using depth cameras at the DMV too. Or, we will develop sufficient methodology to figure it out well enough from the existing photos... depth from a single image.
It sounds sort of disturbing to me. Google reverse image search for faces... that team has done it or could do it easily. But privacy.