I am working on a script that gets the amount of likes (or comments, shares) a public facebook photo has.
The photo is posted on a page, for example: https://www.facebook.com/photo.php?fbid=10151848827816729. These are viewable to the public and so it should be possible to get the amount of likes it has via Javascript.
Note that the Facebook Graph API does not return the amount of likes it has: https://graph.facebook.com/10151848827816729