Attached Link: http://graphics.informatik.uni-freiburg.de/people/volker/volker.html

Actually, facegen allows for the creation of a virtually limitless number of faces. I'm playing with the demo now. In fact, the company also offers a service where they convert photos to heads in a manner that looks to be far more accurate than past methods. It appears that the app is based on research in which you take 3D scans of a number of real heads to derive an "average" head. That head is subivided into eigenfaces...portions of the face such as forehead, nose, etc. which are then parameterized in relationship to each other to ensure that resulting heads look realisitc in their proportions. In theory, data captured from video, photographs, even a single photograph, can be compared to the "average" head, and a morph created reproducing the photographed head with great accuracy. there's an example at the facegen site, but if you really want to blow your mind, click on the link I've supplied and download the MPEG.