We are looking at gain maps to see if we can reduce the artifacts. Styles with hard shadow are more challenging. eg Olaf Blecker http://i1.dripimg.com/t/460000/6554/96/450324_500_8a28bd.jpg
(Note that high contrast doesn't mean hard shadow)
Both papers use multi-scale approach to capture textures in different scales. While Bae's work is global transfer, this paper uses local transfer. This paper first uses a technique called "sift flow" in computer vision to compute the correspondences between example face and input face, and then transfer the image statistics locally, based on the correspondences.