I did this myself recently.
I used AudiMute for the panels; uploaded the photos to them and they created the panels. My wife is very happy with them and that's what counts, in the living room!
My space is similar - Kitchen, dining area, living room, all along a line with a peaked ceiling at 20 feet. I need more than the 8 sq ft that I've done so far, so we're looking for photos I can blow up to three by six without losing too much resolution. That's the hard part.