I reckon they use image recognition too. I have a gash digital camera that gets a lot of use; no exif data beyond camera make/model.
Anyway; in 2005 I went on a skiing trip to Chamonix. Pics were uploaded about a month later, no Facebook activity at the time (or while I was there). The other day FB asked me if they had been taken in Chamonix. So... something else used there at the very least.
How does Facebook use image recognition to recognize that an image of a baby on a blanket with no surroundings visible was taken inside a certain hospital? I doubt it.
Regarding your Chamonix images, perhaps your friends uploaded photos taken at roughly the same time, with geo-tags? Perhaps you are tagged in some of them? That would make for pretty simple logic:
- Facebook knows that you were at a certain place a certain time through the geo-tagging of those photos, as your user is tagged in one of them
- You upload photos taken at the same time as the photos you were tagged in
Conclusion: You must have taken those photos where the photos you were tagged in were taken.
Regarding your Chamonix images, perhaps your friends uploaded photos taken at roughly the same time, with geo-tags?
Nope. Family holiday. Of those there I am the only one with photos on Facebook - and in fact at the time was the only family member with a Facebook account :)
I am intrigued because if it is image recognition there isn't much for them to have gone on. But I am stumped for what else they could have used.
Wow. Maybe they have a bunch of people looking at pictures, manually making suggestions? Google "similar images" search-like tool? It does sound scary if they really had nothing to go on other than the image data.
maybe Facebook just randomly guesses locations. those who get matches write comments on reddit wondering how the hell it works and those that get weird suggestions ignore them :)
Anyway; in 2005 I went on a skiing trip to Chamonix. Pics were uploaded about a month later, no Facebook activity at the time (or while I was there). The other day FB asked me if they had been taken in Chamonix. So... something else used there at the very least.