function [F, V] = vb_face_extract(imagefile, Radius, step, pmax, Bval)
% MRI構造画像から顔表面画像の抽出

function	B = morfology_operation(B, Radius, step, plot_mode, zindx, Nfig)
%-------- モルフォロジー変換 --------
% Apply morfology operations
% Dilation/erosion are done consecutively according to Radius
