% Given a matrix (image), fills its borders with 0, for a better
% visualization. 
% Parameters: A: matrix
%             color: GL of the border
% Returns: The matrix with the border
function y=ImageBorder(A, color);
width=size(A);
height=width(2);
width=width(1);
y=A;
y(1,1:width)=0;
y(height, 1:width)=0;
y(1:height,1)=0;
y(1:height,width)=0;