I'm working on image processing that involves facial features.
Where can I get a generic 3D model of a human face? (any format is fine as long as I can manipulate the data using C or Matlab)
You might have to make your own from a 3d face database, which may not be easy to do. This website has a good listing of public databases. http://www.face-rec.org/databases/
A Open-Source software called MakeHuman might be what you are looking for.