If you know the high school and year(s), you go thru the friends list of every person on Facebook who did post their high school from that year (or nearby years), and does show their friends, until you see her face.
That's only a couple hundred kids, each with a couple hundred friends.
If you still get nothing, start doing friend requests for the people that don't show their friends. I'll bet you'd get another 25-30 kids that way.
I don't see why you'd need facial recognition software to go thru 20,000 pictures.
3/4ths of them would be the wrong gender/age and be immediately disqualified.
But if you're a programmer, you can probably scrape and aggregate to speed things up - drop out the males, other high schools, only show pictures once, etc.
That's only a couple hundred kids, each with a couple hundred friends.
If you still get nothing, start doing friend requests for the people that don't show their friends. I'll bet you'd get another 25-30 kids that way.
I don't see why you'd need facial recognition software to go thru 20,000 pictures.
3/4ths of them would be the wrong gender/age and be immediately disqualified.
But if you're a programmer, you can probably scrape and aggregate to speed things up - drop out the males, other high schools, only show pictures once, etc.