We already know that Facebook is equipped with a facial recognition or auto-tag technology that works on uploaded and shared photos so that when you upload a photo, it already knows who the people appear are and suggests their names to put the tags which will then be warnings for them. What we did not know is that Facebook is not only capable of recognizing the faces, but also the objects and scenes displayed in the photos .
He can therefore recognize, in each photo, if there are dogs, cats, dishes, hats, how many people there are, what they do, if it is night or day and everything is automatically detected.
This type of recognition, however, is hidden from users, visible only in the HTML code of the Facebook site as an alt tag.
The result of this recognition is the possibility of finding, in the Facebook search engine, all the photos in which a cat, a dog or a course appears.
Even if it's just a curiosity, you can see how Facebook tags your photos using a special Firefox extension.
The extension is called Show Facebook Computer Vision Tags and can be installed on Firefox
After installing it, all you have to do is open the Facebook home or the pages of our or other friends' profiles to see, above each photo, the keywords with which it can be found .
The tags on the photos indicate how many people there are, if there is a sky, the sea, a particular object, if it is night or day, if it is a panorama and many other things.
Tags can also include the time of day, what activity was photographed, and whether it is an indoor or outdoor photo.
For example, the photo above tells me that there is water, clouds, the sky, at night, outdoor.
At this point it is clear that thanks to these keywords it is possible to search for photos on Facebook that portray a certain type of subject.
However, this is only possible if you activate the real Facebook search engine, looking in English with the formula, photos with ...
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