I didn't and still wouldn't quilt through the photos. I had my photos professionally transferred to my fabric. I tried it at home, back in the late 1990's it did not work. The book I had did not quilt through the photos either. I think the holes left by the needle and the quilting threads would distort the pics. But I've not seen a quilt with quilting through the pics. It'd be interesting to see how it looks. It may be just fine.
Regards,
Kif