Soft segmentation for robust area computation

The soft segmentation purpose is calculate the area of the object more accurately.

% This code implemented a demo of the soft segmentation method proposed in
%% Z Wang, Y Yang, A non-iterative clustering based soft segmentation approach for a class of fuzzy images
%%Applied Soft Computing 70, 988-999

% Tested methods include:
% Soft segmentation method based on slope difference distritbuion
% Expectation Maximization clustering
% Fuzzy Cmeans clustering
% Kmeans clustering