You seem like a pervert asking this question lol! Just WHAT kind of picture are you asking for sonny?
Are you afraid of girls or something? They *ARE* scary .. IF you have an agenda but if you just try to be friends with her and talk to her like a human being you should be fine. After you get some rapport with her just ask her for her photo.
She *might* say no but the guys who are good with girls aren't afraid of rejection so if she rejects you just chalk it up to experience because good judgment is based on experience and experience is normally based on...bad judgment. lol
and here's yet another tip--> Study this smiley
so she looks like this