interpolation between meshes

Question

I have three face meshes (person A neutral face and expression face and person B neutral face). I'm trying to create a new face mesh by using this simple transformation method *y’_i = y_i + x’_i – x_i* where
*y_i* is person B neutral face vertices
*x’_i* is person A expression face vertices and
*x_i* is person B expression face vertices.
To do this vertices should be correspondence. For example the left eye corner of person B corresponds to left eye corner of person A. I also have x,y,z coordinates of 26 landmarks points of each face. How to build this correspondence relationship among two meshes?

Answer 1

There is no "quick" answer to this question as it is a very deep problem. You might want to look at this book: http://books.google.com/books?id=SKTFw38ZS0UC - even if you just browse it online you will understand this is not a simple question with a simple answer.