I am working on my thesis related to 3D simulation of orthognatic surgery. The aim is to compare 2 3D models, which represent one object - face, but one of these models is slightly different fron the second one in some regions. The first one is a mesh (simulation of surgery) - reference model and the second one is a cloud - control model. Hypotheticaly, there is one region of these 2 objects (their surfaces), which is identical for both of them, it is forehead. I need to use this unchanged region to finely register these 2 models together (only over foreheads) and than measure distances between the rest regions.
And the question is, whether is the following method of registration suitable?
1. point-pair registration - selection of several,more or less coresponding points in the region of forehead, performing rough registration
2. fine registration using ICP algorithm
Does ICP algorithm use only regional points of forehead to finely register 2 models?
Thank You for your help