How exactly do you ask someone if you can take their picture in japanese? Also to take a picture with them? And then the best part, how do you explain you're a foreigner and that their fashion is hella cool?

And a side question, is it considered extremely weird and/or rude for a foreigner to ask a stranger for their picture? Cause I've already done it a couple times with hand gestures and they didn't seem to mind. But I'm still not sure and always hesitate.

EDIT: felt I needed to be a tad more specific incase someone actually answered.

Hello, Mr. Policeman, I'd like to report this weird foreigner who keeps making perverted gestures at me and trying to take my picture :O

j/k

:p That's what I'm trying to avoid cabbit.

delete

lol that was funny

May I take a picture of you? - watashi ha anata no eizou wo tottemoyoika
Together? - isshonika
I'm a foreigner. - watashi ha gaijin desu
Your fashion is cool. - anata no fashion ha kakkoi desu

And just in case the cops come, you can scream this while they're dragging you away

I am not a pervert! - watashi ha hentai janai

janai reminds me of the korean ania