I managed to display the coordinates of x,y and z into a 3D mesh by using delaunay function. The coordinates are in .obj format actually and i have read it into matrix form.
Now, i would like to extract certain features / regions from the 3D mesh, reconstruct a new mesh and get the coordinates of it (I would like to extract specific ROI or volume of interest (VOI) form the mesh).
A 3D facial image mapped into triangular mesh, and i want to extract the nose region. the same method can be used as template for other data.