Static!!
Yeah - I'm just doing a search on the 'net - my phone just started doing this too. I'm at sea level, and doesn't seem to be corrected by turning off the iphone and back on. Maybe I'll try to stick it in a fridge to see if it's a temp thing 🙂 But I haven't dropped it, so it doesn't seem to be damage related (at least not for me)...
I'm sure mine's way outta warranty...
Mine does take photos all green sometimes, or static like your photo. And it will just start working again. It's happened twice now for days at a time :-(