IM2FRONT_BASE - Base function for IM2FRONT.

Contents

Syntax

  D = IM2FRONT_BASE();

See also

Ressembles: IM2FRONT, FMM_BASE. Requires: POTENTIAL2FRONT, IM2POTENTIAL.

Function implementation

function [D, Q] = im2front_base(I, start_pts, method, ...
    alpha, rho, sigma, der, int, samp, eign )

% we DO NOT accept a variable number of inputs (dealt with in IM2FRONT)
% if nargin<=9,     eign = 'l1';
%     if nargin<=8,     samp = 1;
%         if nargin<=7,     int = 'fast';
%             if nargin<=6,     der = 'fast';
%                 if nargin<=5,     sigma = 1;
%                     if nargin<=4,     rho = 3;
%                         if nargin<=3,     alpha = [1 2];   end
%                     end
%                 end
%             end
%         end
%     end
% end

C = size(I,3);

build the potential/cost function

if C==1 && any(strcmpi(method,{'pix','pixinv','iso'}))
    P = im2potential(I, method, alpha);

elseif C==1 && any(strcmpi(method(1:3),{'grd','iso'}))
    P = im2potential(I, method, alpha, sigma);

else % all other cases
    P = im2potential(I, method, alpha, rho, sigma, der, int, samp, eign);
end

propagate the front through this potential

[D, Q] = potential2front(P, start_pts);

end % end of im2front_base