% =============================================================================
% Math 336 - Image Processing - Laboratory 2
%
% A Matlab function for the intesity transformation...
%
%                /  L-1  for r >= L/2
%    s = T(r) = |
%                \   0   for r < L/2
% 
% Marty Kandes
% Department of Physics
% San Diego State University
% Fall 2008
% -----------------------------------------------------------------------------
function [F] = sb(IMAGE)
F = imread(IMAGE);
F = mat2gray(F);
[M,N] = size(F);
for I = 1:M
    for J = 1:N
        if F(I,J) >= 1/2
            F(I,J) = 1;
        else
            F(I,J) = 0;
        end;
    end;
end;
imshow(F);
end