Build a face texture for a code that does 3D scan

We have a code(based on BodyFusion library) that does 3D face scan and builds a 3d model(*.obj) of a face. Currently, code deals with 3d points for constructing a model. We need to build a face texture and apply it to a model(*.obj) In particular, - to accumulate images from camera - to map pixels to the point that are considered as a face - to build a texture - to apply that texture to a model the working code we have to be provided.