基本的matlab图像处理代码

clc;
clear all;
%reading and showing
f1=imread('foreground.jpg');
%converting color image to grayimage
f2=rgb2gray(f1);
figure(1),imshow(f2);
%reading and showing
f3=imread('background.jpg');
%converting color image to grayimage
f4=rgb2gray(f3);
figure(2),imshow(f4);
%background subtracting
f5=abs(double(f2)-double(f4));
[M N]=size(f5);
T=20;
for i=1:M
   for j=1:N
      if f5(i,j)>T
         f5(i,j)=255;
      else
         f5(i,j)=0;
      end
   end
end
f5=uint8(f5);
figure(3);
imshow(f5);
 
% imclose the image