<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/1999/REC-html401-19991224/strict.dtd">
clc;
clear all;
close all;
im=imread('cameraman.tif');
[m n]=size(im);
pixels=[];
levels=256;
for k=0:levels-1
count=0;
for i=1:m
for j=1:n
if im(i,j)==k
count=count+1;
end
pixel(k+1)=count;
end
end
end
figure,stem((0:255),pixel);
figure,bar((0:255),(pixel./(m*n)));
figure,imhist(im);