The photo manipulator explains his process: "It's actually pretty simple, most of these images are ~5 min jobs. The process is mostly just:
1) Copy the head onto a new layer.
2) Reduce background to 65% size (that's the value I was using anyway)
3) Puppet warp the base of the neck/hair to get it to match with the shrunk background as much as possible.
4) Mask away (with a soft brush) the edges of the head layer to make it consistent with the shrunk background." 艺术留学