Matlab code for Thresholding Operation in an Image

Thresholding operation  is the simplest method of image segmentation.

Thresholding can be used to convert gray scale image to a binary images

g(m,n)=   0 for  f(m,n) <T

255 otherwise

MATLAB CODE:

a=imread(‘cameraman.tif’);

figure

imshow(a);

[m n]=size(a);

th=input(‘enter the threshold parameter’);    % Enter the value lies between 0 to 255

for i=1:m

               for j=1:n

                        if a(i,j)<th

                                  b(i,j)=0;

                        else

                              b(i,j)=255;

                end

            end

  end

  figure

  imshow(b);

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